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Matrix?Analysis?Method?for?Precise?Simulation?of?Cable?Force?of?Cable-Stayed?Bridge ZHANG Yang-yong, WU Wan-zhong, ZHOU Yun-gang 2009, 28(6): 979-981.  DOI: 10.3969/j.issn.1674-0696.2009.06.01 Abstract ( )   PDF (250KB) ( )   In?the?process?of?establishing?model?of?cable-stayed?bridge?by?use?of?ANSYS,?it?is?necessary?to?input?the?initial?cable?force?precisely.?But?there?is?no?simple?method?provided?by?ANSYS?to?obtain?the?initial?internal?force?directly,?so?other?alternative?methods?should?be?used,?such?as?element?birth?and?death,?the?initial?strain?method?and?the?temperature?load?method.?After?discussing?the?problems?of?single?simulation?method?and?cyclic?iteration?method,?a?new?method?based?on?matrix?analysis?is?proposed.?This?method?considers?the?mutual?influence?of?cable?force,?modifies?the?cyclic?iteration?formula,?and?simulates?precisely?the?cable?forces?of?cable-stayed?bridges.?At?the?same?time,?the?conventional?cyclic?iteration?method?is?proved?as?special?cases?of?matrix?analysis?method.?The?feasibility?is?verified?by?cable?force?simulation?of?Sutong?cable-stayed?bridge.?The?method?also?provides?thought?to?further?develop?ANSYS?and?solve?similar?problems. References | Related Articles | Metrics

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Influence?of?Structural?Parameters?Variation?on?Dynamic?Characteristics??of?Concrete?Filled?Steel?Tubular?Arch?Bridge SUN Hao, QIAN Yong-jiu, CAI Ying-chun 2009, 28(6): 982-985.  DOI: 10.3969/j.issn.1674-0696.2009.06.02 Abstract ( )   PDF (463KB) ( )   The?main?bridge?of?the?Zhengzhou?Yellow?River?2nd?Bridge?is?a?concrete?filled?steel?tubular（CFST）?arch?bridge.?Choosing?the?main?bridge?as?the?research?object?,the?finite?element?procedure?ANSYS?is?used?to?establish?the?3D?finite?element?dynamic?model.?In?order?to?analyze?the?influence?of?structural?parameters?variation?on?dynamic?characteristics,?17?different?conditions?are?considered?in?the?calculation?and?analysis?process.?The?results?show?that?the?vertical?rigidity?of?this?CFST?bridge?is?stronger?than?the?lateral?rigidity?of?CFST?arch?rib.?The?changes?of?the?transverse?brace?style?have?little?effect?on?the?vertical?rigidity,?but?have?great?impact?on?the?lateral?rigidity?of?the?CFST?arch?rib.?The?brace?damage?is?sensitive?to?the?influence?of?natural?vibration?at?first?step?;?but?the?brace?damage?has?little?effect?on?the?vertical?rigidity.?The?damages?of?suspenders?and?bridge?deck?slabs?influence?faintly?on?dynamic?characteristics?of?the?structure. References | Related Articles | Metrics

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Vehicle-Bridge?Coupling?Vibration?of?Continuous?Beam?Arch?Bridge?Considering??Concrete?Creep?and?Temperature?Deformation?of?Bridge?Deck WANG Fan, GUO Xiang-rong 2009, 28(6): 986-990.  DOI: 10.3969/j.issn.1674-0696.2009.06.03 Abstract ( )   PDF (811KB) ( )   According?to?the?principle?of?total?potential?energy?with?stationary?value?in?elastic?system?dynamics?and?the?＂setting?in?right?position＂?rule?for?formulating?system?matrixes,?the?coupling?vibration?equation?of?vehicle-bridge?system?is?established,?considering?the?deformation?of?the?continuous?beam?concrete-filled?steel?tube?arch?bridge?deck?generated?by?the?creep?and?temperature,?and?making?the?deformation?overlaps?the?track?irregularities?in?the?form?of?combinational?curves.?The?computer?simulation?is?adopted?to?establish?the?dynamic?FEM?model?of?vehicle-bridge?system?and?the?effect?of?deck?creep?and?temperature?deformation?on?coupling?vibration?of?vehicle-bridge?system?is?researched.?The?results?show?that?track?irregularities?caused?by?the?deck?creep?and?temperature?deformation?influence?the?load?decrement?rate?of?wheel?weight,?the?vertical?acceleration?and?the?vertical?Sperling?index?so?obviously?that?track?irregularities?need?to?be?considered,?when?the?safety?and?driving?comfort?of?vehicle?on?the?bridge?is?evaluated,?especially?for?the?high-speed?trains References | Related Articles | Metrics

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Reasonably?Simplified?Calculation?Model?of?Integral?Simple?Supported?Slab??Bridge?with?Large?Width-Span?Ratio ZHOU Jian-ting, LAN Yong, YUAN Rui, PAN Dong-hong, DENG Zhi 2009, 28(6): 991-994.  DOI: 10.3969/j.issn.1674-0696.2009.06.04 Abstract ( )   PDF (381KB) ( )   Aiming?at?the?integral?simple?supported?slab?bridge?with?large?width-span?ratio,?the?approximation?and?limitation?of?the?calculation?principle?of?transverse?distribution?commonly?used?nowadays?are?analyzed.?Three?bridges?with?different?width-span?ratio?are?selected,and?five?kinds?of?ANSYS?finite?element?entity?models?are?established?according?to?different?deck-load?conditions.?A?reasonably?simplified?calculation?model?of?internal?force?of?integral?simple?supported?slab?is?put?forward?by?analyzing?the?difference?between?the?results?got?by?model?and?those?got?by?transverse?distribution?calculation?method. References | Related Articles | Metrics

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Effect?of?Prestressed?Force?on?Arch?of?Simply?Supported?Beam?Bridge MA Chun-jia, FENG Xiao-hao 2009, 28(6): 995-997.  DOI: 10.3969/j.issn.1674-0696.2009.06.05 Abstract ( )   PDF (428KB) ( )   For?flexural?members?of?prestressed?concrete,?exerting?prestressed?force?on?it?will?generate?an?upward?arch,?and?the?prestressed?force?directly?affects?the?arch?size?of?prestressed?concrete?structures.?Taking?Pingtanzi?Bridge?located?at?K?44?＋?528?section?of?Chongqing?Yu-Qian?Expressway?as?an?example,which?has?obvious?upward?arch?problem,?different?upward?arch?values?caused?by?the?partial?prestressed?component?of?A?and?that?of?B?are?analyzed?by?making?use?of?the?designing?parameters.?The?effect?of?prestressed?force?on?arch?of?PC?simply?supported?beam?bridge?is?obtained.?The?result?indicates?that?the?large?prestressed?force?will?make?girder?generate?large?arch?values. References | Related Articles | Metrics

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Numerical?Analysis?on?Stress?Concentration?Factors?for?Tubular?T-Joints BAI Yu-hui, CHEN Zhe, ZHOU Shui-xing 2009, 28(6): 998-999.  DOI: 10.3969/j.issn.1674-0696.2009.06.06 Abstract ( )   PDF (291KB) ( )   The?stress?distribution?of?tubular?T-joints?at?hot?spot?stress?areas?and?its?maximum?stress?concentration?factors?（SCFs）?under?the?axial?loads?are?analyzed?by?use?of?finite?element?method.?Through?the?computation,?it?is?found?that?the?maximum?stress?concentration?factors?are?located?at?the?saddle?position.?Therefore,?the?influence?rule?of?tubular?T-joint?geometric?parameters?on?the?stress?concentration?factors?is?also?investigated?through?analyzing?numerical?models?with?different?geometric?parameters. References | Related Articles | Metrics

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Secondary?Development?for?GUI?of?Box?Girder?Bridge?Based?on?ABAQUS WANG Jia-lin, LI Ping 2009, 28(6): 1000-1004.  DOI: 10.3969/j.issn.1674-0696.2009.06.07 Abstract ( )   PDF (508KB) ( )   The?secondary?development?function?in?widely-used?ABAQUS?software?and?the?principle?as?well?as?the?steps?to?develop?plug-in?in?ABAQUS?software?by?using?object-oriented?Python?language?are?introduced.?With?the?parametric?finite?element?modeling?of?variable?cross-section?box?girder?as?the?research?foundation,?the?menus?and?toolbars?of?box-girder?parametrically?modeling?are?developed?by?use?of?API?functions?provided?by?ABAQUS?and?AFX?GUI?Toolkit,which?improves?the?modeling?speed?of?box-girder?bridge?and?also?provides?powerful?support?for?sophisticated?finite?element?analysis?of?box-girder?bridge. References | Related Articles | Metrics

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Experimental?Study?on?Bending?Behavior?of?Steel?Box?Epoxy??Resin?Concrete?Composite?Beam SHEN Xin-kai, ZHOU Zhi-xiang, ZHUANG Jia-zhi 2009, 28(6): 1005-1007.  DOI: 10.3969/j.issn.1674-0696.2009.06.08 Abstract ( )   PDF (443KB) ( )   The?comparative?tests?of?bending?resistance,?ductility?and?ultimate?bearing?capacity?are?carried?out?between?steel?box?epoxy?resin?concrete?composite?beams?and?normal?steel?box?concrete?composite?beams.?The?test?results?demonstrate?that?steel?box?epoxy?resin?concrete?composite?beams?have?better?bending?resistance,?ductility?and?ultimate?bearing?capacity. References | Related Articles | Metrics

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Aerodynamic?Characteristics?of?High-Speed?Vehicle?and?Bridge?in?the?Crosswind HU Sai-long, GUO Wen-hua 2009, 28(6): 1008-1010.  DOI: 10.3969/j.issn.1674-0696.2009.06.09 Abstract ( )   PDF (537KB) ( )   Making?use?of?widely-used?fluid?dynamics?software?FLUENT,?two-dimensional?stationary?incompressible?Navier-?Stokes?equation?and?SST?turbulence?model,?the?resistant?force,?lifting?force?and?subversion?moment?coefficients?of?vehicle?cross?section,cross?section?of?32-meter?box-girder?of?simple?beam?bridge?and?the?combination?of?the?two?under?the?effect?of?15?m/s?crosswind?condition?are?analyzed?and?calculated?by?adopting?the?finite?volume?method.?The?result?of?numerical?analysis?shows?that?when?the?vehicle?is?on?the?simple?beam?bridge?under?the?effect?of?cross?wind,the?lifting?force?coefficients?suffered?by?the?vehicle?are?bigger?than?the?vehicle?itself;?the?subversion?moment?coefficients?are?obviously?smaller?than?the?vehicle?itself;the?lifting?force?coefficients?of?simple?beam?bridge?are?obviously?smaller?than?the?vehicle?itself. References | Related Articles | Metrics

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Application?of?Comprehensive?Investigation?in?Muzhailing?Super?Long?Tunnel HUANG Yong 2009, 28(6): 1011-1015.  DOI: 10.3969/j.issn.1674-0696.2009.06.10 Abstract ( )   PDF (715KB) ( )   Muzhailing?super?long?tunnel?in?Lanzhou-Chongqing?railway?has?many?characteristics,?such?as?great?buried?depth,?high?ground?stress,?tectonic?evolution,?and?large?scale?distribution?of?slate?and?carbonaceous?slate.?According?to?these?charac-?teristics,?various?investigating?means?are?used?during?the?process?of?investigation,?that?is?to?say,?making?use?of?the?macroscopic?function?of?remote?sensing,?taking?the?geology?investigation?as?the?foundation,?using?physical?exploration?to?decode?and?interpret,?as?well?as?taking?drilling?as?the?verification.?This?comprehensive?investigation?has?received?very?good?results?in?practical?work,?which?provides?references?and?experience?for?the?super?long?tunnel?investigation?in?mountainous?railway References | Related Articles | Metrics

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Percolation?Model?of?Asphalt?Concrete?Pavement?Crack?Damage WU Guo-xiong, DiNG Wang-fei, ZHANG Yang, LI Liang 2009, 28(6): 1016-1020.  DOI: 10.3969/j.issn.1674-0696.2009.06.11 Abstract ( )   PDF (664KB) ( )   Percolation?model?in?essence?belonging?to?a?branch?of?theory?of?probability?is?an?available?tool?to?deal?with?phase?transitions?and?critical?phenomena.?The?asphalt?concrete?pavement?appears?crack?damage,?because?numerous?micro-cracks?have?interaction.?The?limitless?connective?process?of?micro-cracks?belongs?to?percolation?problems?in?mathematics.?The?theory?of?percolation?is?applied?to?describing?the?destructive?process?of?asphalt?concrete?pavement,?and?then?the?appropriate?percolation?model?is?selected?out?to?analyze?and?compute?the?percolation?process?of?asphalt?concrete?pavement?cracking?under?nearest,?nearer,?and?third?neighbor?conditions.?The?method?of?renormalization?group?is?used?to?find?out?the?percolation?threshold?,which?can?determine?the?critical?condition?of?asphalt?concrete?pavement?crack.?The?proposed?model?provides?a?new?way?to?study?crack?damage?of?asphalt?concrete?pavement. References | Related Articles | Metrics

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Orthogonal?Analysis?on?Structure?Design?Parameters?of?Flexible?Base?Asphalt?Pavement ZHU Hong-zhou, TANG Bo-ming, LIU Bo-ying 2009, 28(6): 1021-1024.  DOI: 10.3969/j.issn.1674-0696.2009.06.12 Abstract ( )   PDF (306KB) ( )   The?typical?structures?of?flexible?base?asphalt?pavement?at?home?and?abroad?are?comprehensively?analyzed.?The?effect?of?key?structure?parameters?on?two?performance?indicators?of?flexible?base?asphalt?pavement,?that?is?the?rebound?deflection?of?pavement?surface?and?the?pitch?stress?at?the?bottom?of?asphalt?layer,?is?studied?by?the?orthogonal?method.?These?key?structure?parameters?includes?the?depth?of?asphalt?treated?base?and?unbound?graded?aggregate?base,?the?module?of?subgrade?and?so?on.?The?results?show?that：the?module?of?sub-grade?has?important?influence?on?rebound?deflection?of?pavement?surface;?increasing?the?thickness?of?asphalt?layer?can?reduce?the?tensile?stress?at?the?bottom?of?asphalt?layer?and?prolong?the?fatigue?life?of?asphalt?pavement;however,the?thickness?of?asphalt?layer?has?little?effect?on?prolonging?the?fatigue?life?of?asphalt?pavement?when?the?total?thickness?of?asphalt?layer?exceeds?25cm References | Related Articles | Metrics

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Performance?Research?on?Crumb?Rubber?Modified?Asphalt HE Zhao-yi, WEi Jie-lai, WU Hong-yu, WANG Qiang, ZHANG Wen-wu 2009, 28(6): 1025-1027.  DOI: 10.3969/j.issn.1674-0696.2009.06.13 Abstract ( )   PDF (275KB) ( )   Taking?rubber?powder?of?ramp?and?meridian?waste?tire?as?the?modifier,the?modified?asphalt?tests?of?routine?performance,?dynamic?shear?rheometer?（DSR）?and?bending?beam?rheometer（BBR）?are?conducted?with?three?kinds?of?particle?size,?including?20?mesh?,40?mesh?and?80?mesh,?as?well?as?the?condition?of?20%?mixing?amount.?The?modification?mechanism?and?thermodynamics?performance?of?rubber?powder?are?researched?from?the?experiments?of?differential?scanning?calorimetry.?The?results?indicate?that?modified?asphalt?performances?of?anti-rutting,?anti-fatigue?and?low?temperature?performance?are?improved?after?rubber?powder?modification;?the?rubber?powder?modification?effect?of?ramp?tire?is?superior?to?that?of?meridian?tire?;?the?improvement?effect?of?penetration?index,?anti-rutting?factor?and?elastic?recovery?of?modified?asphalt?is?better?in?the?case?of?greater?particle?size?rubber?powder,?and?the?low?temperature?performance?is?similar?to?that?of?smaller?particle?size?;?so?considering?the?performance-price?ratio,the?optimal?particle?size?is?20?mesh?and?the?optimal?mixing?amount?is?20%. References | Related Articles | Metrics

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Rutting?Characteristics?of?Asphalt?Pavement?at?Longitudinal?Slope YU Wen-sheng, LI Chang 2009, 28(6): 1028-1032.  DOI: 10.3969/j.issn.1674-0696.2009.06.14 Abstract ( )   PDF (616KB) ( )   The?indoor?creeping?experiment?is?carried?out?to?analyze?the?rutting?disease?at?longitudinal?slope,?and?then?the?parameters?are?determined?by?＂four-unit?and?five-parameter?model＂.?On?the?base?of?in-situ?test?result?of?temperature,?the?asphah?pavement?temperature?field?is?simulated?by?finite?element?method,?according?to?vertical?and?horizontal?stress?in?rectangle?load?area;then?the?rutting?amount?per?day?is?computed?under?conditions?of?typical?structure,?load?and?vehicle?speed.?Through?the?comparison?of?computing?results?under?changing?speed,?overload?level?and?longitudinal?slope?gradient,?the?increase?of?loading?time?caused?by?reduce?of?vehicle?speed?has?the?most?important?influence,?the?overload?does?the?second,?and?the?horizontal?load?has?little?influence.?In?the?actual?engineering,?on?the?one?hand,?improving?the?performance?of?anti-rutting?material?is?necessary;on?the?other?hand,?suitable?combination?of?grades?and?distances?is?important?to?guarantee?the?overall?vehicle?speed. References | Related Articles | Metrics

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Experimental?Study?on?Interface?Layer?Strength?Characteristics?of??Rigid-Flexible?Composite?Pavement WANG Huo-ming, LING Tian-qing, XiAO You-gao, TANG Qiang 2009, 28(6): 1033-1036.  DOI: 10.3969/j.issn.1674-0696.2009.06.15 Abstract ( )   PDF (344KB) ( )   Through?the?indoor?shear?test?and?pull-out?test?of?composite?board,a?comparative?study?is?carried?out?to?test?the?influence?of?different?cement?concrete?slab?treatments,?different?waterproof?adhesive?materials?as?well?as?different?asphalt?content?of?interface?layer?on?the?strength?of?the?interracial?layer.?And?the?comparative?study?of?the?durability?between?different?waterproof?adhesive?materials?is?also?carried?out.?Seoeral?results?are?obtained?through?the?study?of?laboratory?tests,?such?as?the?best?depth?of?fine?milling?interface,?the?optimum?asphalt?content?of?interface?with?different?treatments,?the?correlation?between?shear?strength?and?bond?strength?of?the?interface?layer. References | Related Articles | Metrics

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Finite?Element?Analysis?on?CRCP?Considering?the?Sub-grade?Friction ZHONG Chun-ling, , LIU Han-bing, ZHANG Yun-long, , XiE Yi 2009, 28(6): 1037-1040.  DOI: 10.3969/j.issn.1674-0696.2009.06.16 Abstract ( )   PDF (625KB) ( )   The?facilities?of?end?anchorage?of?continuously?reinforced?concrete?pavement（CRCP）?is?introduced,?the?issues?related?with?the?anchorage?beam?are?discussed?when?the?FEM?is?applied.?The?appropriate?parameters?are?selected,?CRCP?with?3?end?anchorage?beams?is?analyzed,?and?the?displacement?and?stress?change?of?various?sections?are?given. References | Related Articles | Metrics

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Pavement?Roughness?Evaluation?Method?Based?on?Three-Degree-Freedom??Models?Including?Human,?Vehicle?and?Road ZHANG Hong-liang, WANG Bing-gang, YANG Wan-qiao, 2009, 28(6): 1041-1045.  DOI: 10.3969/j.issn.1674-0696.2009.06.17 Abstract ( )   PDF (246KB) ( )   In?order?to?evaluate?the?riding?comfort?of?the?pavement?more?accurately,?the?weighted?root-mean-square?acceleration?of?the?passenger?is?selected?as?evaluation?index;?the?human-vehicle-road?system?is?simplified?into?a?three-degree-freedom?vibration?model?and?according?to?Newton＇s?law,the?vibration?differential?equations?are?established?and?solved?by?transfer?matrix?method.?As?a?result,?the?evaluation?method?for?pavement?roughness?based?on?human-vehicle-road?interaction?is?proposed.?The?analysis?results?show?that?the?evaluation?results?of?the?method?proposed?are?consistent?with?the?actual?conditions,?for?it?can?consider?the?impacts?of?pavement?types?and?highway?grades.?But?the?international?roughness?index,?the?power?spectral?density?and?the?standard?deviation?of?roughness?can＇t?describe?the?driving?comfort?well?under?partial?conditions. References | Related Articles | Metrics

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Asphalt?Composite?Seal?Overlay?Construction?and?Quality?Control?Technology WU Jin-liang, GAO Yan-zhi, YE Lei, PI Yu-hui 2009, 28(6): 1046-1048.  DOI: 10.3969/j.issn.1674-0696.2009.06.18 Abstract ( )   PDF (123KB) ( )   Asphalt?composite?seal?is?a?structure?of?developing?the?technology?of?knot?gravel?mud?face?mask.?It?is?widely?used?because?it?has?simple?structure,?high?performance?vs.?price?ratio,?and?convenient?for?rural?road?construction.?The?technology?summarization?of?asphalt?composite?seal?overlay?construction?is?got?from?various?aspects,?such?as?raw?materials,?mixture?ratio?designing,?and?construction?process;and?the?quality?control?is?also?discussed. References | Related Articles | Metrics

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Design?and?Application?of?Dust?Recycling?Instrument?at?Asphalt?Mixing?Plant MA Jun, GAO Li-chun 2009, 28(6): 1049-1021.  DOI: 10.3969/j.issn.1674-0696.2009.06.19 Abstract ( )   PDF (320KB) ( )   The?asphalt?concrete?will?produce?lots?of?dust?in?the?mixing?process.?If?the?dust?can＇t?be?recycled?well?,it?not?only?wastes?the?raw?materials?but?also?pollutes?the?environment.?Therefore,?the?dust?recycling?instrument?is?researched?and?manufactured,which?is?simple,?easy-to-use?and?easy-to-manufacture,?by?mechanical?and?electrical?control?device?combing?with?project?practice.?The?components?design,?technology?principle,?technical?process?and?application?situation?of?dust?recycling?instrument?are?introduced?in?detail. References | Related Articles | Metrics

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Numerical?Simulation?for?Failure?Process?of?Steel?Reinforced?Concrete?Columns WANG Sun, Li Ping 2009, 28(6): 1052-1055.  DOI: 10.3969/j.issn.1674-0696.2009.06.20 Abstract ( )   PDF (442KB) ( )   Currently?the?research?on?the?steel?reinforced?concrete?is?depended?mainly?on?the?experiment?data?to?deduce?and?summarize.?The?numerical?simulation?model?is?established?on?the?basis?of?software?ABAQUS.?Finally,the?accuracy?and?effectiveness?of?concrete?damage?plasticity?model?of?ABAQUS?in?the?analysis?of?high-strength?steel?reinforced?concrete?is?verified,through?the?comparative?analysis?on?the?experiment?data?and?the?failure?mode. References | Related Articles | Metrics

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Regional?OD?Synthesis?Research?of?Route?Net?Based?on?TransCAD PANG Qing-ge, HU Yu-cong, WANG Zi-ming, YOU Jin-long 2009, 28(6): 1055-1059.  DOI: 10.3969/j.issn.1674-0696.2009.06.21 Abstract ( )   PDF (481KB) ( )   Large?amount?of?OD?data?are?involved?in?the?layout?of?route?net?in?transportation?industry.?The?thought?of?regional?OD?synthesis?based?on?TransCAD?using?GISDK?tools?is?proposed?and?further?research?on?the?algorithms?of?regional?OD?synthesis?is?carried?out?under?the?guide?of?current?situation.?The?proposed?algorithm?is?a?modification?and?an?improvement?of?series-parallel?method?and?the?parallel?method,?so?the?modified?model?and?concrete?algorithms?are?obtained.?The?regional?OD?synthesis?is?finally?realized?on?the?platform?of?TransCAD?by?use?of?the?improved?algorithm?model. References | Related Articles | Metrics

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Determination?of?the?Shortest?Path?Considering?Delays?at?Intersections HUANG Mei-ling, LU Bai-chuan 2009, 28(6): 1060-1063.  DOI: 10.3969/j.issn.1674-0696.2009.06.22 Abstract ( )   PDF (656KB) ( )   Firstly,?the?methods?that?GIS?is?applied?to?establish?the?network?of?city?road?and?the?direction?of?intersection?and?path?is?analyzed?by?spatial?analysis?are?introduced.?Then,the?Floyd?algorithm?considering?the?delay?at?intersections?is?proposed?to?solve?the?shortest?path?problem?in?the?network?of?city?road,?in?which?the?delay?of?traffic?flow?on?each?direction,?such?as?going?straight,?turning?left?or?right?is?fully?taken?into?consideration.?The?proposed?algorithm?is?applied?to?calculate?and?analyze?the?road?network?of?Shiqiaopu?district?in?Chongqing,which?obtains?the?more?reasonable?results?than?the?conventional?algorithm?does. References | Related Articles | Metrics

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Application?of?Wireless?Senor?Network?to?Intelligent?Transportation?System?of?City?Public?Bus ZHANG Xiong-xi, 2009, 28(6): 1064-1066.  DOI: 10.3969/j.issn.1674-0696.2009.06.23 Abstract ( )   PDF (272KB) ( )   Combining?with?the?characteristics?and?requirements?of?intelligent?transportation?system,?the?typical?application?of?wireless?sensor?network?technology?to?city?public?buses?for?the?intelligent?management?is?introduced.?The?system?can?achieve?real?time?supervision?and?transfer?the?traffic?information?by?the?wireless?sensor?networks?technology,?which?integrates?the?vehicle?terminal?with?the?center?of?scheduling?and?supervision?and?contributes?to?intelligentize?the?transportation?system References | Related Articles | Metrics

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Design?Concepts?in?Traffic?Impact?Analysis?of?Synthetic?Plaza ZHAO Xiao-cui, PAN Xiao-dong 2009, 28(6): 1067-1070.  DOI: 10.3969/j.issn.1674-0696.2009.06.24 Abstract ( )   PDF (819KB) ( )   It?must?achieve?the?traffic?control?standards?or?related?requirements?before?a?certain?size?of?synthetic?plaza?is?constructed?by?traffic?impact?analysis.?Firstly,?the?purpose?of?the?traffic?impact?analysis?is?expatiated.?Then,?the?relationship?analysis?between?responsibilities?and?rights?among?the?correlative?units?is?given?as?well?as?the?developers＇?attitude?changes?from?passive?to?active?to?solve?the?traffic?problems.?After?the?project?exploitation?plan?is?made,?the?traffic?organization?optimization?is?the?key?to?ensure?the?normal?operation?of?the?project.?Aiming?at?a?variety?of?traffic?problems?that?may?occur?during?the?project?exploitation,?some?design?concepts?that?can?be?used?in?synthesis?plaza?traffic?organization?optimization?are?given?to?ensure?the?traffic?safety?and?traffic?fluency?around?the?project. References | Related Articles | Metrics

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Forecast?of?Highway?Passenger?Transport?Volume?Based?on?Rough?Set?Theory CHEN Jian, HUO Ya-min, FU Zhi-yan, TENG Yan-bin 2009, 28(6): 1071-1074.  DOI: 10.3969/j.issn.1674-0696.2009.06.25 Abstract ( )   PDF (201KB) ( )   Prediction?of?highway?passenger?transport?volume?is?not?only?the?basis?of?developing?and?planning?the?highway?passenger?transport,?but?also?the?premise?of?planning?comprehensive?passenger?transport?center?and?the?city＇?s?comprehensive?transport.?The?forecast?model?of?passenger?transport?volume?is?constructed?on?the?base?of?rough?set?theory,?through?the?discretization?of?continuous?attributes?in?decision?table?of?forecasting?the?highway?passenger?transport?volume,?constructing?the?decision-making?matrix?and?obtaining?the?simplest?decision-making?rules.?The?simplest?decision-making?rules?obtained?by?the?model?avoid?the?errors?caused?by?fluctuations?in?statistical?data?during?the?years,?so?the?final?forecast?results?are?growth?intervals?rather?than?absolute?values,?which?better?reflects?the?needs?of?highway?passenger?transport.?Finally?the?model?is?applied?to?predict?highway?passenger?transport?volume?in?Chengdu?in?the?next?five?years,?and?the?growth?interval?of?passenger?transport?volume?is?got. References | Related Articles | Metrics

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Safety?Evaluation?of?High-Level?Highways?at?Weaving?Areas??Based?on?Back?Propagation?Neural?Network LIXiao-juan, DING Yi 2009, 28(6): 1075-1078.  DOI: 10.3969/j.issn.1674-0696.2009.06.26 Abstract ( )   PDF (201KB) ( )   The?relationship?between?traffic?conflicts?and?their?influence?factors?as?well?as?the?relationship?between?traffic?conflicts?and?safety?are?analyzed.?Traffic?conflicts?are?taken?as?the?diversion?between?their?influence?factors?and?the?road?safety.?And?the?safety?evaluation?model?of?the?high-level?highways?at?weaving?areas?is?proposed?using?a?back?propagation（BP）?neural?network,which?explores?a?new?way?in?safety?evaluation?of?high-level?highways?at?weaving?areas. References | Related Articles | Metrics

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Cognition?Difference?of?Drivers?about?Space?Distance?of?Red?and?Green?Obstacles?at?Night ZHAO Wei-hua, LIU Hao-xue, BI Ren-zhong, YAN Yuan-chun 2009, 28(6): 1079-1082.  DOI: 10.3969/j.issn.1674-0696.2009.06.27 Abstract ( )   PDF (304KB) ( )   In?order?to?study?the?impact?of?color?on?distance?cognition?in?dynamic?environment?at?night?and?analyze?the?changing?rules?of?difference,32?drivers?are?selected?to?attend?the?real?road?experiment?in?cases?of?different?depth?distance?and?different?velocity.?Results?of?all?cognition?are?summed?up?and?tested,?and?the?characteristic?value?of?cognition?difference?is?obtained.?The?variation?trend?of?cognition?difference?is?simulated?by?BP?neural?network.?Research?results?show?that?in?the?case?of?dynamic?ground?environment?at?night,?the?absolute?distance?cognition?difference?augments?and?the?relative?one?de-?crease?with?the?depth?distance?increasing;in?the?case?of?increasing?the?velocity?and?a?further?depth?distance,?the?absolute?distance?cognition?difference?experiences?decrease,increase?and?decrease?again?chronically?;in?the?case?of?medium?or?nearer?depth?distance?,the?absolute?distance?cognition?difference?decreases?gradually,?and?the?relative?distance?cognition?difference?decreases?with?velocity?increasing. References | Related Articles | Metrics

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Some?Properties?of?Turbulent?Shear?Flow LIU Zhao-cun, FAN Wei-jia 2009, 28(6): 1083-1087.  DOI: 10.3969/j.issn.1674-0696.2009.06.28 Abstract ( )   PDF (305KB) ( )   The?flowing?properties?of?wall?shear?flow?are?analyzed?and?the?distribution?relationship?of?internal?energy?is?calculated.?Furthermore,?the?dynamic?characteristics?of?laminar?and?turbulent?flow?as?well?as?the?transition?from?the?laminar?flow?to?turbulent?flow?are?studied.?On?the?basis?of?reviewing?and?commenting?the?related?literature?review,?the?general?mechanism?of?turbulent?shear?flow?is?probed.?The?result?shows?that?the?energy?transfer?has?relations?with?different?structures?at?different?flowing?stages,?and?the?dissipation?and?diffusion?of?energy?relate?closely?with?the?resonance?and?frequency-locking;the?turbu-?lence?is?a?partial?phenomenon?and?has?symmetric?breaking＇s?character?in?essence References | Related Articles | Metrics

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Finite?Element?Analysis?on?Geo-grid?Reinforced?Earth?Retaining?Wall?at?Construction?Stages CHEN Hua, , ZHAO You-ming, ZHANG Fa-chun 2009, 28(6): 1088-1091.  DOI: 10.3969/j.issn.1674-0696.2009.06.29 Abstract ( )   PDF (485KB) ( )   The?structural?characteristics?of?the?geo-grid?reinforced?earth?retaining?wall?are?introduced?at?first,and?the?finite?element?method?（FEM）?used?in?the?geo-grid?reinforced?earth?retaining?wall?is?also?given.?In?this?finite?element?method,?Mohr-Coulomb?model?is?used?to?simulate?the?computation?model?of?soil,?the?linear-elastic?model?is?applied?to?simulate?the?geogrid?and?Goodman?model?is?adopted?to?simulate?the?relationship?between?the?soil?and?the?geo-grid.?The?construction?situation?of?one?typical?engineering?example?is?analyzed?by?FEM,?and?the?stress?distribution?and?deformation?features?of?geo-gfid?reinforced?earth?retaining?wall?at?different?construction?stages?are?obtained.?The?computation?result?shows?that?：the?failure?surface?at?geo-grid?reinforced?earth?retaining?wall?is?an?arc?surface,?and?the?safety?coefficients?decrease?gradually?with?the?soil?filling.?At?last,?the?stress?distribution?of?floor?and?the?pull?of?reinforced?materials?are?accordance?with?the?data?of?field?measure,?which?verifies?the?reliability?of?FEM?proposed. References | Related Articles | Metrics

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Pull-Out?Tests?of?Bulb?Anchor?in?Geotechnical?Anchorage?Engineering RAO Xiao-yu, XIONG Xiao-lin 2009, 28(6): 1092-1096.  DOI: 10.3969/j.issn.1674-0696.2009.06.30 Abstract ( )   PDF (680KB) ( )   Debonding?of?interface?between?steel?strand?and?grout?is?the?dominant?failure?model?of?conventional?prestressed?anchor?cable,?and?in?order?to?avoid?the?debonding,?the?bulb?anchor?of?structural?engineering?is?modified?appropriately?and?used?in?geotechnical?anchorage?engineering?to?enhance?the?anchorage?capacity?of?embedment?section.?Eight.cement-based?grouts?with?different?mixing?ratios?are?designed,?in?which?bulb?and?conventional?anchor?cables?are?embedded?in?mediumweathered?sandstone.?Then?the?complete?load-displacement?curves?of?the?rock?anchors?are?obtained?by?pull-out?tests?in?laboratory.?The?test?results?indicate?that?load-transfer?mechanism?of?conventional?anchor?and?bulb?anchor?is?different?obviously?due?to?wedging?effect?of?bulb?structure,?the?bearing?strength?of?bulb?anchor?is?markedly?higher?than?that?of?conventional?an-?chor,?and?the?bulb?structure?decreases?the?sensibility?of?bearing?strength?of?rock?cable?bolt?to?embedment?length?and?mechanical?performance?of?cement-based?grout.?These?characteristics?of?bulb?anchor?can?elevate?the?utility?efficiency?of?cable?materials,decrease?the?amount?of?anchors,reduce?the?project?costs?and?enhance?the?safe?reliability?of?anchorage?system.?So?it?is?worthy?of?applying?bulb?anchor?popularly?to?the?actual?engineering. References | Related Articles | Metrics

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Application?of?Electrical?Resistivity?Tomography?to?Leakage??Diagnosis?of?Earth?Rock-Fill?Dam ZHAO Ming-jie, XU Rong, WANG Jun-jie, WANG Peng 2009, 28(6): 1097-1101.  DOI: 10.3969/j.issn.1674-0696.2009.06.31 Abstract ( )   PDF (964KB) ( )   In?order?to?make?a?more?accurate?diagnosis?of?leakage?position,?the?resistivity?tomographic?technology?is?used?in?the?leakage?diagnosis?of?earth?rock-fill?dam?at?Dalin?reservoir,for?the?resisitivity?parameters?of?medium?are?sensitive?to?the?water.?The?results?of?field?investgation?show?that,?there?are?seepage?flows?located?above?the?part?of?331.5?m?at?the?extended?earth?rock-fill?dam?and?the?left?bank?part?of?the?dam?;?at?the?same?time,?there?is?seepage?potential?located?above?329.?0?m?at?the?fight?bank?part?of?homogeneous?earth?dam.?The?reinforced?methods?are?proposed?according?to?the?diagnosis?results,?including?replacing?earth-rock?matierials?located?above?331.5?m?and?329.?0?m?at?the?right?bank?part?of?homogeneous?earth?dam,?constructing?a?61?m?length?impermeable?barrier?and?so?on,?which?provide?scientific?basis?for?the?repairment?and?reinforcement?of?earth?rock-fill?dam?of?Dalin?reservoir References | Related Articles | Metrics

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Shallow?Shoal?Regulating?Effects?of?Manting?Dashaba?in?Lancang?River QiN Zong-mo, , WU Song-ren 2009, 28(6): 1102-1106.  DOI: 10.3969/j.issn.1674-0696.2009.06.32 Abstract ( )   PDF (744KB) ( )   Manting?Dashaba?in?Lancang?River?is?located?at?the?downstream,29km?away?from?Jinghong?city.?The?length?of?the?shallow?section?is?about?9km?and?the?section?situation?is?very?complex,?so?the?regulation?is?very?difficult.?After?introducing?the?basic?situation?of?Manting?Dashaba?briefly,?the?causes?of?the?dangerous?shoal?are?analyzed;the?regulation?principle?is?presented?according?to?the?physical?model?tests?and?results?of?mathematical?model?calculation?;?furthermore,?the?regulating?effects?are?discussed.?Finally?the?main?engineering?measures?which?can?lead?to?better?regulating?effects?is?summarized. References | Related Articles | Metrics

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Numerical?Simulation?of?Navigable?Water?Conditions?at?the?Transshipment??Terminal?of?Xiangjiaba LIU Ya-hui, JIN Rui 2009, 28(6): 1107-1111.  DOI: 10.3969/j.issn.1674-0696.2009.06.33 Abstract ( )   PDF (546KB) ( )   The?feasibility?study?is?carried?out?on?the?navigation?of?two?temporary?transshipment?terminals?called?Ershiyan?and?Xintanba,?which?are?used?at?the?upstream?of?Xiangjiaba?Hydropower?Station?in?the?closure?construction?period.?Two-dimensional?mathematical?model?of?water?flow?is?used?to?analyze?and?compare?the?changes?of?water?condition?before?and?after?the?construction?of?transshipment?terminal.?The?result?shows?that?the?engineering?construction?has?faint?influence?on?navigation?condition?and?the?project?is?feasible. References | Related Articles | Metrics

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Preliminary?Study?and?Its?Application?of?Navigation?Grading?Standard?Planning?of??the?Tributary?Channel?in?TGP?Reservoir?Area TONG Si-chen, XU Guang-xiang, WEN Chuan-ping 2009, 28(6): 1112-1117.  DOI: 10.3969/j.issn.1674-0696.2009.06.34 Abstract ( )   PDF (284KB) ( )   The?navigation?condition?of?tributaries?at?TGP?reservoir?area?has?improved?essentially?but?it?still?lacks?navigation?grading?standard,?for?the?normal?grading?standard?of?inland?river?takes?no?consideration?of?the?effect?of?reservoir?on?the?tributary?channel?navigation.?So?the?normal?grading?standard?can＇?t?be?applied?to?determine?the?technical?grade?of?tributary?channel.?Taking?Meixi?River?as?the?typical?tributary,the?preliminary?exploration?of?grading?the?tributaries?navigation?technically?after?the?accomplishment?of?TGP?reservoir?is?carried?out;the?exploration?is?discussed?from?various?aspects?,such?as?flow?condition,?channel?dimension?and?the?navigation?guarantee?rate.?The?proposed?standard?is?applied?to?Meixi?River,?and?its?channel?navigation?standard?after?the?accomplishment?of?TGP?is?obtained,?which?can?be?taken?as?the?reference?for?the?navigation?grading?study?of?TGP?reservoir?and?navigation?tributaries?of?similar?reservoirs. References | Related Articles | Metrics

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Parameters?Matching?of?Power?System?of?Micro?Hybrid?Electric?City?Bus HUANG Da-xing, HE Ren, Li Li-qun 2009, 28(6): 1118-1120.  DOI: 10.3969/j.issn.1674-0696.2009.06.35 Abstract ( )   PDF (281KB) ( )   Vehicles?are?fuel-consuming?under?idle?condition,?and?vehicles?start?and?stop?frequently?on?urban?conditions.?The?micro?hybrid?electric?city?bus?makes?rapid?start-up?and?stop?control?of?engine?by?use?of?BSG,which?equates?the?abolition?of?the?engine?idling?condition.?Through?the?analysis?on?start-up?and?braking?performance?of?vehicle,?the?structure?of?transmission?system?of?city?bus?is?improved,?the?control?strategy?is?proposed,?and?the?parameter?matching?of?power?system?is?designed.?The?simulation?analysis?of?vehicle?performance?is?done?by?using?the?ADVISOR?software?to?determine?the?parameters?of?the?components.?The?results?show?that?the?improved?structure?meets?the?requirements?of?start-up?performance?of?the?vehicle,at?the?same?time?the?fuel-consuming?is?more?economical. References | Related Articles | Metrics

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Improved?Crashworthiness?Design?of?Vehicle?40?%?Offset?Impact FENG Ying, DENG Zhao-Wen, MA Xun, GAO Wei 2009, 28(6): 1121-1125.  DOI: 10.3969/j.issn.1674-0696.2009.06.36 Abstract ( )   PDF (689KB) ( )   The?finite?element?model?of?offset?deformation?barriers?and?the?model?of?a?saloon?car?100%?frontal?impact?is?established?and?also?validated.?According?to?nile?ECE?R94.?01?,the?finite?element?model?of?40%?offset?impact?of?this?ear?is?established;and?then?the?simulation?analysis?on?crashworthiness?of?40%?offset?impact?is?carried?out?by?use?of?the?finite?element?;?finally,?the?direction?and?of?improving?crashworthiness?are?determined.?According?to?the?direction?of?improving?vehicle?40%?offset?crashworthiness,?the?improved?crashworthiness?design?is?carried?out?from?three?aspects.?Through?the?comparative?analysis,?the?improved?design?enhances?the?crashworthiness?of?vehicle?40%?offset?impact?to?a?certain?extent. References | Related Articles | Metrics

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Kinematics?Analysis?and?Solution?of?Heavy?Manipulator?with?6-DOF LUO Tian-hong, XiONG Xiao-hui 2009, 28(6): 1126-1130.  DOI: 10.3969/j.issn.1674-0696.2009.06.37 Abstract ( )   PDF (290KB) ( )   Aiming?at?the?high?precision?demand?for?the?heavy?load?automobile?equipment?assembly?line,?a?multifunction?manipulator?with?6-DOF?is?designed,which?is?driven?by?hydraulic?pressure.?The?kinematics?model?of?the?manipulator?is?established?by?Denavi-Hartenberg（D-H）?method,?at?the?same?time?,the?working?principles?,forward?and?inverse?kinematics?solution?of?the?heavy?load?manipulator?assembly?are?analyzed.?According?to?the?solutions?of?manipulator＇s?forward?and?inverse?kinematics?equations,?the?drive?of?the?manipulator?with?6-DOF?is?realized?by?adopting?the?hydraulic?method,?which?has?many?merits,?such?as?the?greatness?of?drive?power,?the?simplicity?of?operatiom?and?the?accuracy?of?installation.?The?proposed?manipulator?assembly?is?adapt?to?various?kinds?of?automobile?assemblies. References | Related Articles | Metrics

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Two-Stage?Logistics?Network?Routing?Optimization?Model?Based?on?VRP?model CHEN Dai-lian, LI Peng 2009, 28(6): 1131-1134.  DOI: 10.3969/j.issn.1674-0696.2009.06.38 Abstract ( )   PDF (192KB) ( )   Taking?the?two-stage?logistics?network?routing?optimization?with?three?levels?based?on?VRP?model?as?the?research?object,the?optimization?problem?is?divided?by?utilizing?the?decomposition?method?of?heuristics?solution?into?two?sub-problems,?that?is,?selecting?the?logistic?center?location?and?optimizing?the?distribution?routing.?Combining?with?the?mathematical?planning?software?LINGO?8.?0,the?solving?model?of?VRP-Based?MSDLRP?problem,?which?means?multi-vendor,?multi-distribution?center?location?and?routing?optimization,?is?obtained.?Using?the?proposed?model?the?best?location?and?number?of?suppliers,logistics?center?and?the?optimal?distribution?routes?are?obtained,which?makes?the?costs?generated?by?the?process?of?products?distributing?from?the?multi-suppliers?via?multi?logistics?centers?to?the?terminal?customers?smallest.?Moreover,?this?proposed?model?is?verified?by?actual?examples.?The?proposed?method?can?obtain?the?optimal?solution?in?a?very?short?time?for?the?small-scale?problem,?which?has?certain?practical?value. References | Related Articles | Metrics

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Application?of?Genetic?Algorithm?in?Choosing?Transfer?Stations?of??Border?Distribution?Region WANG Yong, CHi Jie 2009, 28(6): 1135-1138.  DOI: 10.3969/j.issn.1674-0696.2009.06.39 Abstract ( )   PDF (365KB) ( )   Based?on?the?capacity?of?distribution?center?and?transfer?station,?the?scope?of?their?distribution?region?is?divided?respectively,?and?the?uncertain?border?region?is?divided?into?several?distribution?units?by?adding?road?grade.?Firstly,?the?transfer?stations?are?decided?to?divide?the?distribution?units.?According?to?distribution?costs?of?the?units,?the?fixed?costs?and?variable?costs?of?distribution?centers?and?transfer?stations,?the?operation?research?model?of?border?distribution?region?partition?is?established.?Genetic?algorithm?is?applied?to?design?the?encoded?scheme,?by?which?distribution?units?choose?the?distribution?centers?and?transfer?stations,?and?then?the?program?is?written?to?solve?the?partition?problem. References | Related Articles | Metrics

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Equipment?Allocation?System?Modeling?Based?on?Bi-level?Programming XU Hai-zhu, ZHU Jian-chong, XiE You- Wu, JI Wan-feng 2009, 28(6): 1139-1142.  DOI: 10.3969/j.issn.1674-0696.2009.06.40 Abstract ( )   PDF (207KB) ( )   Considering?the?situation?of?equipment?support,?the?balance?of?supply?satisfaction?and?allocation?costs,?the?structural?costs?and?running?costs?of?equipment?allocation?system?are?analyzed,?and?then?the?bi-level?programming?model?of?equipment?allocation?system?is?established.?The?network?structures?and?allocating?schemes?of?equipment?allocation?system?under?dynamic?demand?are?researched,?and?the?optimized?network?and?running?costs?are?obtained.?The?model?proposed?makes?the?equipment?allocation?system?more?scientific?and?has?a?guide?meaning?to?the?optimization?of?equipment?allocation?scheme. References | Related Articles | Metrics