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Vertical?Seismic?Response?on?a?Top-Bear?Arch?Bridge PENG Yong-jun, ZHU Dong-sheng, ZANG Bo 2009, 28(3): 475-479.  DOI: 10.3969/j.issn.1674-0696.2009.03.01 Abstract ( )   PDF (252KB) ( )   Based?on?an?actual?reinforced?concrete?box?arch?bridge?with?131m?span,?the?computing?model?of?the?entire?bridge?is?established.?The?seismic?response?spectrum?of?the?bridge?is?input?from?longitudinal,?transverse?and?multi-direction?and?the?seismic?response?of?this?bridge?is?calculated.?Through?changing?the?inputting?mode?of?response?spectrum,?the?spanratio?and?arch-axis?coefficients,?the?seismic?internal?force?of?main?arch?is?calculated?under?different?span-ratio?and?arch-axis?coefficients.?Contrastive?analysis?on?differences?of?the?seismic?internal?force?of?main?arch?under?the?vertical?seismic?response?is?carried?out.?The?research?result?indicates?that?regarding?the?great?span?arch?bridge,?the?vertical?seismic?response?enlarges?the?seismic?internal?force?of?the?arch,?and?it?is?not?reasonable?to?take?no?consideration?of?the?effect?of?vertical?seismic?response. References | Related Articles | Metrics

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Influence?of?Vertical?Joints?on?the?Post-Construction??Deflection?of?Continuous?Rigid?Frame?Bridges HE Chang 2009, 28(3): 480-483.  DOI: 10.3969/j.issn.1674-0696.2009.03.02 Abstract ( )   PDF (354KB) ( )   The influence of vertica l jo ints on post??construction de flection of con tinuous rig id fram e br idg es is d iscussed w ith the considera tion o f the des ign and construction condition. A t the sam e tim e, the contr ibution of vertical shearing disto rtion to the la ter deflection under d ifferen t construction conditions is ana ly zed. In the current case, the inc rem ents o f the deflec?? tion of the bridge ma in g irders resu lting from the shearing creep o f the vertica l jo ints shou ld no t be neg lected. A t last, the configuration and construction m easures are proposed to im prove the qua lity of the segm enta l vertica l jo ints o f them a in g ird?? e rs. References | Related Articles | Metrics

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Time-Dependent?Reliability?Analysis?on?Existing?Concrete?Bending??Structure?with?Double?Reinforced?Rectangular?Section SHEN Xiao-jun, GAO Fei, ZHENG Yi 2009, 28(3): 484-486.  DOI: 10.3969/j.issn.1674-0696.2009.03.03 Abstract ( )   PDF (164KB) ( )   Considering?the?damage?of?concrete?and?steel?as?well?as?the?condition?that?materials?are?deteriorated?with?time?at?the?same?time,?the?time-dependent?computation?model?of?existing?bending?structure?with?double?reinforced?rectangular?section?is?studied?according?to?the?design?and?computing?formulas?in?the?code.?The?simplified?calculation?formula?of?time-dependent?resistance?and?time-dependent?reliability?indexes?are?also?given.?This?method?is?applied?to?an?actual?engineering?project,?and?the?calculation?results?prove?that?it?is?fit?with?the?results?of?current?reliability?evaluation?standard. References | Related Articles | Metrics

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School?of?Civil?Engineering?＆?Architecture,?Chongqing?Jiaotong?University,?Chongqing?400074,?China GAO Yan-mei, ZHOU Zhi-xiang 2009, 28(3): 487-491.  DOI: 10.3969/j.issn.1674-0696.2009.03.04 Abstract ( )   PDF (572KB) ( )   It?is?well?acknowledged?that?the?rationality?of?force?of?arch?ring?can?be?measured?by?the?level?of?concord?between?the?pressure?line?and?arch?axis?concerning?traditional?concrete?arch?bridges.?So?this?concept?is?further?applied?to?all?concrete?structures?like?concrete?beam?bridges?（bending?members）,?multi-line?rigid?frame?bridges?（compression-flexure?members）,?and?soon.?It?is?proved?that?on?the?premise?of?proper?prestress?to?all?concrete?structures,?the?extent?of?eccentricity?of?pressure?line?and?axis?can?always?be?brought?under?control?so?as?to?make?full?section?compressed.?On?this?basis,?an?advantageous?kind?of?eight-shaped?prestressed?concrete?rigid-frame?arch?bridge?is?created?under?certain?circumstance,?and?its?control?area?of?enveloping?curve?of?line?of?pressure?also?applicable?to?all?concrete?structures?is?deduced?to?be?-Ks≤E≤Kx. References | Related Articles | Metrics

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Influence?Analysis?on?Anchorage?and?Bearing?Offsets?of??Curved?Cable-Stayed?Bridge SUN Ce-shi, TONG Jian-sheng, ZHOU Shui-xing 2009, 28(3): 492-496.  DOI: 10.3969/j.issn.1674-0696.2009.03.05 Abstract ( )   PDF (853KB) ( )   Curved?cable-stayed?bridge?is?complex?in?stress?due?to?curvature.?Special?structures?such?as?main?beam?anchorage?offsets,?main?tower?anchorage?offsets?and?bearing?offsets?are?available?to?improve?the?mechanical?state?of?the?bridge.?Based?on?Guijiugou?Bridge,?the?influences?of?main?beam?and?main?tower?anchorage?with?offsets?toward?outboard?curve?and?the?main?pier?beating?with?offsets?toward?inboard?curve?on?mechanical?state?of?curved?cable-stayed?bridge?are?analyzed?by?FEM.?The?results?show?that?the?influences?of?all?the?offsets?on?the?differences?of?cable-tensions?of?the?two?sides?of?the?curve,?the?transverse?deflections?of?towers?and?the?influences?of?bending?moments?of?crossbeam?are?all?in?linear?tendency. References | Related Articles | Metrics

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Experimental?Study?on?Performance?of?Cement-Based??Grout?for?Anchorage?Engineering RAO Xiao-yu, LI Jian, YANG Jing 2009, 28(3): 497-500.  DOI: 10.3969/j.issn.1674-0696.2009.03.06 Abstract ( )   PDF (619KB) ( )   The?cement-based?grout?has?been?used?extensively?in?the?current?reinforcing?systems?of?prestressed?anchorage.?Its?physical?and?mechanical?properties?are?the?key?parameters?for?optimal?design?of?reinforcing?systems.?Only?the?cement?grade?and?compressive?strength?of?cement-based?grout?have?been?noticed?in?the?current?prestressed?anchorage?specifications,?and?there?has?been?less?information?about?cement-based?grout.?Therefore,?based?on?many?investigations?on?cement-based?grout?of?entity?projects,?eleven?cement-based?grouting?materials?with?different?mixture?ratios?are?designed?and?their?physical?and?mechanical?performances?are?tested?respectively.?The?laboratory?pull-out?test?has?also?been?carried?out?to?study?the?influence?of?cement-based?grout?on?the?anchorage?performance?of?rock?cable?bolt.?The?test?results?indicate?that?mixing?appropriate?sand?into?cement-based?grout?could?increase?its?tensile?strength,?elastic?modulus?and?shear?modulus,?enhance?the?strength?of?cementation?interface?and?anchorage?rigidity;?so?the?anchorage?performance?of?rock?cable?bolt,?consequently,?is?remarkably?improved.?However,?it?is?less?efficient?through?decreasing?the?water-cement?ratio?to?elevate?the?ultimate?bearing?capacity?of?rock?cable?bolt References | Related Articles | Metrics

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Effect?of?Axial?Pressure?Force?on?Horizontal??Displacement?of?Cantilever?Column ZHANG Ming, DENG Lei-lei, LIHua, SHEN Pu-sheng 2009, 28(3): 501-504.  DOI: 10.3969/j.issn.1674-0696.2009.03.07 Abstract ( )   PDF (279KB) ( )   On?the?basis?of?the?short-term?stiffness?formulas?provided?by?the?current?concrete?cedes?for?prestressed?flexural?member?and?normal?flexural?member,?the?formulas?of?cracking?moment,?pre-cracking?section?stiffness?and?post-cracking?section?stiffness?for?the?horizontal?displacement?calculation?of?cantilever?column?which?under?axial?force?action?and?without?axial?force?action?are?deduced.?Some?parameter?factors?which?having?effect?on?the?axial?force?action?are?analyzed,?such?as?the?elastic?modulus?ratio?of?reinforcement?and?concrete,?the?ratio?of?reinforcement,?the?ratio?of?sectional?effective?height?to?sectional?height,?and?the?axial?force?values,?then?some?qualitative?regularities?about?the?impact?of?foregoing?parameters,?the?interaction?relationship?between?foregoing?parameters?and?axial?force?action?are?obtained?at?the?same?time.?Finally,?the?resuits?of?cantilever?columns?show?that?axial?force?has?a?beneficial?impact?on?the?displacement?of?structure?or?member?in?some?cases. References | Related Articles | Metrics

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Geometrical?Analysis?of?Arch?Rib?Elevation?Change?Caused??by?Tower?Deviation?during?Cable-Hoisting?Construction DENG Jiang-ming 2009, 28(3): 505-507.  DOI: 10.3969/j.issn.1674-0696.2009.03.08 Abstract ( )   PDF (304KB) ( )   Making?use?of?geometrical?analysis?method,?the?formulas?of?elevation?change?caused?by?tower?deviation?have?been?developed.?Combining?with?the?cable-hoisting?system?of?New?Longmen?Bridge,?the?segmental?elevation?changes?are?discussed?on?deviation?of?cable-tower?and?main-tower.?The?results?show?that?the?effects?are?too?small?to?be?taken?into?consideration?for?New?Longmen?Bridge?cable-hoisting?system,?when?the?height?and?position?of?cable-tower?has?displaced.?However,?the?effect?of?main-tower?deviation?on?segmental?elevation?is?relatively?larger,?and?it?must?be?taken?into?cousideration?during?the?construction?control.?The?methods?and?analysis?results?proposed?are?of?referential?value?for?the?design?of?cable-hoisting?systems?and?the?control?of?segmental?elevation. References | Related Articles | Metrics

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Application?of?Influence?Matrix?Method?to?Secondary??Cable-Adjustment?of?Cable-Stayed?Bridges YANG Xing, ZHANGMin, ZHOU Shui-xing 2009, 28(3): 508-511.  DOI: 10.3969/j.issn.1674-0696.2009.03.09 Abstract ( )   PDF (265KB) ( )   In?order?to?improve?the?structure?security?and?guarantee?the?girder＇s?safety?in?the?construction?of?cable-stayed?bridges,?cables?should?be?tensioned?twice?and?then?the?expected?completed?state?can?be?achieved?at?last.?A?good?method?is?proposed?to?calculate?the?cable?tension?forces?and?the?adjusted?order.?Based?on?the?theory?of?influence?matrix,?an?optimized?control?model?to?solve?the?second?cable?adjustment?is?established,?and?the?method?of?penalty?function?is?used.?This?method?has?many?advantages,?such?as?high?preciseness,?convenience?and?practice?etc.?,?which?can?also?be?used?to?minimize?the?error?of?the?cable?tension?force?at?the?completed?state. References | Related Articles | Metrics

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Application?Example?for?New?Strengthening?Technology?of??Changing?T?Beam?into?Box?Beam ZHANG Xi-qiang, LiYi-yu, MENG Yun, CHEN Hui 2009, 28(3): 512-514.  DOI: 10.3969/j.issn.1674-0696.2009.03.10 Abstract ( )   PDF (339KB) ( )   Changing?T?beam?into?box?beam?is?a?new?method?to?reinforce?the?bridge?with?T?girder.?To?improve?the?bearing?capacity?of?the?bridge,?the?original?section?is?changed?from?T-section?into?box?section,?through?using?the?high-strength?bolts?and?epoxy?mortar?expansion?paste?plate?in?the?end?of?the?ribs?of?the?T-beam.?This?new?method?makes?good?use?of?anti-bending?ability?and?torsional?rigidity?of?box?beam;?therefore,?it?achieves?the?target?of?improving?the?overall?performance?significantly?comparing?with?the?traditional?T-beam?technology?theory.?This?new?method?is?advantageous?to?reduce?the?eonstruetion?period,?simplify?the?construction?process?and?have?no?traffic?disruption.?A?ease?study?of?T-beam?bridge?reinforcement?is?provided?to?be?referenced. References | Related Articles | Metrics

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Application?of?Grillage?Method?to?Reinforcement?with??the?Section?Changing?Method?for?T.Girder?Bridge Dai Can, ZHOU Jian-ting, YANG Sheng-chao, NiNG De-biao 2009, 28(3): 515-517.  DOI: 10.3969/j.issn.1674-0696.2009.03.11 Abstract ( )   PDF (311KB) ( )   Grillage?method?is?an?effective?method?for?spatial?analysis?on?bridge?structure.?According?to?the?principle?of?the?grillage?method,?the?mechanical?behavior?of?reinforcement?with?section?changing?method?for?T-girder?bridge?is?analyzed.?Combining?with?the?specific?engineering?example,?the?contrasting?analysis?is?carried?out?between?the?grillage?method?and?2D?beam?finite?element?method.?The?eontrastive?results?show?that?the?application?of?grillage?method?to?the?reinforcement?with?section?changing?method?for?T-girder?bridge?is?effective.?The?dealing?measures?proposed?are?promising?to?offer?certain?guide?to?the?practice. References | Related Articles | Metrics

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Semi-Analytical?Solution?for?Longitudinal?Vibration?of??Variable?Impedance?Pile YU Wen-jin 2009, 28(3): 518-524.  DOI: 10.3969/j.issn.1674-0696.2009.03.12 Abstract ( )   PDF (997KB) ( )   Considering?the?three-dimensional?wave?effect?of?the?soil?pile,?vertical?vibration?characteristics?of?the?variable?impedance?pile?is?analyzed?when?the?layered?viscous?damping?materials?in?the?soil?pile?is?affected?by?any?axial?exciting?timevarying?force.?And?then?the?analytical?solutions?for?frequency?domain?response,?complex?stiffness?and?velocity?admittance?are?obtained.?The?influence?of?modulus?change?of?soil?at?the?bottom?of?the?pile?and?impedance?change?in?pile?on?the?vibration?characteristics?of?vertical?pile?is?analyzed. References | Related Articles | Metrics

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Practical?Security?Identification?Technology?of?Stone?Arch?Bridge?in?Service HE Guo-yin, ZHOU Jian-ting, LIU Lu 2009, 28(3): 525-527.  DOI: 10.3969/j.issn.1674-0696.2009.03.13 Abstract ( )   PDF (158KB) ( )   The?typical?diseases?of?stone?arch?bridge?in?the?Three?Gorges?Reservoir?area?are?summarized?through?the?investigation,?and?four?kinds?of?typical?diseases?of?stone?arch?bridges?are?investigated?and?evaluated?by?spatial?finite?element?software.?Based?on?these?investigations,?the?limited?value?index?of?the?security?and?the?identification?technology?of?the?four?typical?diseases?of?the?bridge?are?obtained,?which?is?of?certain?referential?significance?for?the?rank-and-file?technical?personnel?to?evaluate?the?security?of?stone?arch?bridge?effectively?and?expediently. References | Related Articles | Metrics

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Mechanical?Monitoring?and?Analysis?on?Composite?Lining?Structure??of?Highway?Tunnel?with?Large?Cross?Section XU Lin-sheng 2009, 28(3): 528-530.  DOI: 10.3969/j.issn.1674-0696.2009.03.14 Abstract ( )   PDF (289KB) ( )   According?to?the?monitoring?data?of?the?large-section?tunnel?of?one?3-lane?expressway?in?Yunnan?province,?the?mechanical?characteristics?of?composite?lining?structure?at?each?construction?stage?have?been?studied,?mainly?including?bolt?axial?force,?ground?pressure,?internal?force?of?steel?arch?shelf,?secondary?lining?structure?load?state?and?so?on.?The?results?demonstrate?that：?mechanical?situation?of?composite?lining?structure?is?very?complex,?and?unsymmetrical?pressure?always?exists?because?of?V-grade?surrounding?rock?structure?difference.?The?actual?ground?pressure?is?far?smaller?than?theoretical?value?of?that,?so?some?supporting?structural?parameters?of?the?pre-design?may?be?adjusted?properly. References | Related Articles | Metrics

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Application?of?Lemniscate?Curve?to?the?Design?of??Integral?Small?Circular?Road?of?Interchange XiANG Qin, ZHU Hong-wei, SUN Jia-si 2009, 28(3): 531-533.  DOI: 10.3969/j.issn.1674-0696.2009.03.15 Abstract ( )   PDF (220KB) ( )   According?to?the?analysis?on?geometry?characteristics?of?the?Lemniscate?curve?and?road?performance,?the?application?of?Lemniscate?curve?in?designing?the?integral?small?circular?road?of?interchange?is?proposed?and?the?feasibility?of?the?usage?of?the?Lemniscate?curve?is?also?testified.?Based?on?the?practical?situation,?the?common?formula?to?oblique?interchange?is?obtained.?For?the?sake?of?convenient?design?and?construction,?the?design?parameter?of?Lemniscate?curve?small?circular?road?is?chosen,?and?the?formula?for?location?of?Lemniscate?curve?is?given.?Finally,?objective?comparisons?are?carried?out?between?the?Lemniscate?curve?and?the?conventional?small?circular?road?from?different?aspects. References | Related Articles | Metrics

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Dry?Shrinkage?Properties?of?Polymer?Lattice?Porous?Concrete?of?Pavement Yi Zhi-jian, LIYing, YANG Qing-guo, ZHAO Chao-hua, TONG Rui-jin 2009, 28(3): 534-536.  DOI: 10.3969/j.issn.1674-0696.2009.03.16 Abstract ( )   PDF (311KB) ( )   The?pavement?which?is?made?of?polymer?lattice?porous?concrete?is?a?new?kind?of?road?surface?structure,?and?it?has?many?advantages?in?engineering?practice,?such?as?water?permeability,?noise-decreasing?and?color?landscape?features.?Polymer?lattice?porous?concrete?is?the?internal?space?frame?structure?with?frames,?nodes?and?interspaces?that?have?been?consolidated?by?polymer?cement.?According?to?related?specifications,?the?test?of?drying?shrinkage?performance?is?carried?out.?The?drying?shrinkage?performance?of?polymer?lattice?porous?concrete?is?compared?with?that?of?general?cement?concrete?and?large?porous?concrete?without?sand.?The?drying?shrinkage?ratios?of?polymer?lattice?porous?concrete?at?different?ages?are?obtained.?The?results?show?that?polymer?lattice?porous?concrete?has?favorable?drying?shrinkage?performance. References | Related Articles | Metrics

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Fractal?Features?of?Cracking?at?Low-Temperature??of?Fiber?Asphalt?Concrete WU Guo-xiong, LI Liang, HU Gan-feng 2009, 28(3): 537-542.  DOI: 10.3969/j.issn.1674-0696.2009.03.17 Abstract ( )   PDF (797KB) ( )   It?is?researched?that?the?fiber?can?inhibit?asphalt?concrete?cracking?and?the?fiber?asphalt?concrete?cracks?possess?fractal?characteristics.?Therefore,?through?the?observation?of?asphalt?concrete?cracking?of?different?fiber?content?under?the?effect?of?temperature?and?load?and?the?extraction?of?comes-ponding?crack?distribation,?the?fractal?dimension?is?adopted?to?study?the?growth?of?the?fiber?asphalt?concrete?at?low?temperature?and?establish?the?relationships?among?temperature,?load?and?fractal?dimension.?The?process?of?generating?and?expanding?of?fiber?asphalt?concrete?cracking?can?be?verified?by?the?change?law?of?fraetal?dimension,?which?provides?a?new?thought?to?research?the?cracking?of?fiber?asphalt?concrete. References | Related Articles | Metrics

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Influence?of?Rock?Asphalt?Modified?Bitumen??on?Asphalt?Rheological?Property LU Zhao-feng, , HE Zhao-yi, QiN Min, HUANG Gang 2009, 28(3): 543-547.  DOI: 10.3969/j.issn.1674-0696.2009.03.18 Abstract ( )   PDF (427KB) ( )   With?the?experiments?of?dynamic?shear?rheometer?（DSR）,?bending?beam?rheometer（BBR）?and?Brookfield?rotary?viscometer,?the?performances?of?modified?asphalt?with?different?mixing?contents?of?rock?asphalt?are?studied,?and?the?rheology?characteristics?of?modified?asphalt?are?analyzed.?The?results?indicate?that?the?high?temperature?PG?grades?and?the?viscosity?are?enhanced?;?the?anti-rutting?factor?is?increased?and?the?phase?angle?is?reduced;?the?high?temperature?stability?is?enhanced?greatly?and?the?temperature?sensitivity?is?reduced?after?mixing?in?rock?asphalt?modifier.?Furthermore,?the?change?rate?increases?with?the?increase?of?the?addition?;?the?creep?stiffness?modulus?increases?and?low-temperature?performance?decreases?at?a?low?temperature.?If?the?dosage?of?rock?asphalt?is?controlled?from?2%?to?8%?,it?would?have?no?considerably?adverse?influence?on?low?temperature?performance. References | Related Articles | Metrics

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Fundamental?Performance?of?SBS/Gilsonite??Composite?Modified?Asphalt PAN Ruo-yu, SUN Xiao-min, CHEN Yan-xian, LU Xiao-zhong 2009, 28(3): 548-550.  DOI: 10.3969/j.issn.1674-0696.2009.03.19 Abstract ( )   PDF (185KB) ( )   The?influence?rule?of?the?proportion?of?SBS/gilsonite?on?performance?of?modified?asphalt?is?studied,?through?the?research?of?three?major?performance?indexes?of?SBS/gilsonite?composite?modified?asphalt.?The?results?show?that：?with?a?constant?amount?of?active?ingredient?in?modified?asphalt,?the?penetration?of?modified?asphalt?changes?little?when?the?proportion?of?gilsonite?increases;?the?softening?point?of?modified?asphalt?shows?a?downward?trend,?that?is?to?say,?the?effect?of?composite?of?gilsonite?and?SBS?on?the?improvement?of?softening?point?is?inferior?to?the?effect?of?SBS?itself;?the?ductility?of?modified?asphah?declines?significantly,?and?its?ductility?at?15℃?declines?even?sharply.?Adding?proper?amount?of?gilsonite?could?improve?the?dispersion?of?SBS?in?the?matrix?asphalt?to?some?extent References | Related Articles | Metrics

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Influence?Factors?of?the?Shearing?Strength??of?Fiberglass-Polyester?Paving?Mat HU Xue-liang, YANG Wen-jun, ZHU Hong-zhou, WEiGang 2009, 28(3): 551-554.  DOI: 10.3969/j.issn.1674-0696.2009.03.20 Abstract ( )   PDF (329KB) ( )   In?order?to?prevent?reflection?cracking,?fiberglass-polyester?paving?mat?as?a?kind?of?anti-cracking?layer?between?semi-rigid?base?and?bituminous?overlay?is?placed.?It?is?studied?that?the?interlayer?adhesion?is?one?of?the?main?factors?for?the?fiberglass-polyester?paving?mat?to?prevent?reflection?cracking.?Therefore,?the?interlaminate?adhesion?between?semi-rigid?base?and?bituminous?overlay?is?discussed?from?theoretic?analysis?and?experimental?study.?Firstly,?making?use?of?BISAR?procedure,?the?change?law?of?shearing?stress?at?the?top?and?down?surface?of?the?fiberglass-polyester?paving?mat?is?analyzed?;?secondly,?through?the?omnipotence?testing?machine?simulating?shearing?test,?the?analysis?on?the?experiment?of?the?shearing?strength?of?fiberglass-polyester?paving?mat?is?carried?out,?and?different?kinds?of?factors?influencing?the?shearing?strength?of?fiberglass-polyester?paving?mat?are?analyzed,?such?as,?viscous?layer?of?oil?type,?sticky?layer?of?oil?consumption?and?shearing?velocity,?etc.. References | Related Articles | Metrics

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Evaluation?Method?of?Anti-Erosion?Performance?for??Cement-Stabilized?Macadam?Base?Material HE Xiao-bing, YANG Qing-guo, Yi Zhi-jian 2009, 28(3): 555-558.  DOI: 10.3969/j.issn.1674-0696.2009.03.21 Abstract ( )   PDF (413KB) ( )   Based?on?the?analysis?of?erosion?mechanism?of?semi-rigid?base?material,?the?loading?platform?of?MTS?is?proposed?to?evaluate?the?anti-erosion?performance?of?cement-stabilized?macadam?base?material.?This?method?is?also?applied?to?the?anti-erosion?performance?study?of?polypropylene?fiber?strengthened?cement-stabilized?macadam.?The?results?show?that?the?eroding?rate?in?20?minutes?of?14-day?curing?cement-stabilized?macadam?material?specimens?can?be?used?to?evaluate?the?anti-erosion?performance?of?cement-stabilized?macadam?material?reasonably;?appropriate?volume?of?polypropylene?fiber?mixed?into?cement-stabilized?macadam?material?can?improve?its?anti-erosion?performance?significantly. References | Related Articles | Metrics

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Pavement?Performance?and?Design?Standard?of?Graded?Broken?Stone?Based?on?Vibration?Molding ZHOU Wei-feng, LIYan-wei, ZHANG Xiu-li, MA Biao 2009, 28(3): 559-564.  DOI: 10.3969/j.issn.1674-0696.2009.03.22 Abstract ( )   PDF (299KB) ( )   In?order?to?make?full?use?of?the?advantage?of?the?graded?broken?stone?and?improve?the?road?performance?of?graded?broken?stone,?different?molding?ways?are?used?to?analyze?the?physical?and?mechanical?properties?of?graded?broken?stone.?The?design?specifications?and?design?standards?of?graded?broken?stone?which?are?based?on?vibration?molding?are?proposed,?and?their?feasibility?is?verified?through?practical?project.?The?results?indicate?that?the?vibration?molding?matches?much?better?with?the?working?way?of?roller.?Comparing?with?the?heavy?compaction?way,?the?maximum?dry?density?designed?by?vibration?way?is?improved?remarkably;?the?mechanical?indexes?of?graded?broken?stone?got?by?the?vibration?molding,?including?CBR,?the?anti-deformation?ability?and?so?on,?are?much?better.?Practical?engineering?shows?that：?the?deflection?of?composite?pavement?with?graded?broken?stone?base?is?equivalent?to?the?deflection?of?semi-rigid?pavement.?Without?the?special?equipments,?the?on-site?water?content,?gradation?and?compaction?degree?can?meet?the?standards?of?vibration?design?method?through?the?application?of?the?improved?construction?technology. References | Related Articles | Metrics

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Mechanism?and?Trend?of?Stability?Deterioration?of?Soil?Bank?Slope??during?the?Course?of?Water?Level?Declining LIU Hou-cheng, TANG Hong-mei, GU Xiu-zhi 2009, 28(3): 565-568.  DOI: 10.3969/j.issn.1674-0696.2009.03.23 Abstract ( )   PDF (506KB) ( )   Typical?soil?bank?slopes?of?Three?Gorges?Reservoir?area?are?taken?as?research?object.?Geostduio?software?is?adopted?to?carry?out?the?numerical?simulation?of?soil?bank?slope.?The?trend?of?transformation?of?the?saturation-instauration?infiltration?field?is?calculated?on?the?condition?that?the?reservoir?water?level?is?declining?from?175m?to?145m?during?the?reservoir?operation;?moreover,?the?mechanism?of?stability?deterioration?of?soil?bank?slope?is?studied.?The?calculation?results?demonstrate?that?during?the?course?of?water?level?of?reservoir?declining,?as?the?permeability?coefficients?of?soil?bank?slope?declines,?the?stability?coefficients?of?slope?decline?faster;?and?the?stability?coefficients?has?similar?downward?trend. References | Related Articles | Metrics

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Stability?of?Slope?under?Effect?of?Slop?Load ZHANG Chun-sun, WU Jin-liang, LIXiao-jun, CHEN Fu-feng 2009, 28(3): 569-571.  DOI: 10.3969/j.issn.1674-0696.2009.03.24 Abstract ( )   PDF (324KB) ( )   Currently,?the?properties?of?soil,?water?content?rate?of?soil,?geometry?of?soil,?water?erosion?and?earthquake?are?considered?as?the?main?factors?that?influence?the?stability?of?slop,?and?the?slop?load?action?is?not?taken?into?account.?In?order?to?study?the?influence?of?slope?load?on?the?slope?stability?and?the?degree?of?influence,?the?stability?of?slop?with?slop?load?action?and?without?the?slop?load?action?is?analyzed?using?the?traditional?limit?equilibrium?method,and?then?the?results?of?both?cases?are?compared.?Through?the?ease?studies,?the?results?show?that?the?slop?load?make?little?effect?on?the?stability?of?upper?slop,?but?it?will?make?the?stability?of?underlying?slop?decrease?greatly,?so?the?function?of?the?whole?slop?is?greatly?influenced References | Related Articles | Metrics

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Classification.?System?of?Connection?Road?of?Pearl?River??Delta?Urban?Agglomeration?Based?on?Function YANG Hong-zhi, DENG Yun-fa, XU Jin-liang 2009, 28(3): 572-578.  DOI: 10.3969/j.issn.1674-0696.2009.03.25 Abstract ( )   PDF (683KB) ( )   Taking?Pearl?River?Delta?as?an?example,?the?region?traffic?characteristics?and?traffic?spatial?characteristics?of?urban?agglomeration?are?analyzed.?Based.?on?traffic?location?theory?and?economic?gravity?model,?the?framework?of?traffic?net?has?been?established.?The?functions?of?connection?road?of?urban?agglomeration?are?categorized,?including?channel?function,?arterial?function,?collector?function?and?local?service?function.?Furthermore,?the?classification?system?with?five?levels?is?developed,?that?is?expressway,?class?Ⅰ,?Ⅱ,?Ⅲ?of?connection?read?of?urban?agglomeration?and?local?road. References | Related Articles | Metrics

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Evaluation?Model?of?Urban?Public?Traffic?System??Based?on?Set?Pair?Analysis YAN Yong-fei, ZHANG Xin-gui, ZHU Shun-ying, XiONG Ji-ning, WANG Hong, YAN Xinping 2009, 28(3): 579-583.  DOI: 10.3969/j.issn.1674-0696.2009.03.26 Abstract ( )   PDF (180KB) ( )   The?integrated?multi-level?evaluation?index?system?of?urban?public?traffic?and?the?corresponding?level?of?the?standard?limits?are?amended.?A?synthetic?evaluation?method?of?urban?public?traffic?system?based?on?the?set?pair?analysis?theory?is?proposed?by?utilizing?index?exceeding?method?to?bear?out?objective?weights?of?evaluation?indexes,?which?Confirms?the?synthetic?evaluation?level?of?the?system?through?calculating?the?relative?degree?of?＂identicalness,?differentness?and?reverse＂.?This?method?is?applied?to?the?integrated?public?traffic?evaluation?system?of?Qingdao,?and?the?evaluation?results?identify?with?the?results?got?by?the?attribute?recognition?model.?The?contrast?analysis?with?the?gray?clustering?method?and?attribute?recognition?model?indicates?that?the?urban?public?traffic?system?synthetic?evaluation?method?based?on?the?set?pair?analysis?theory?is?feasible. References | Related Articles | Metrics

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Traffic?Influence?and?Result?Forecast?of?Car?Free?Day XiAO Yu-min, CHEN Jia, SHAO Yi-ming 2009, 28(3): 584-587.  DOI: 10.3969/j.issn.1674-0696.2009.03.27 Abstract ( )   PDF (326KB) ( )   During?car?free?day,?non-public?motorized?vehicles?are?prohibited?in?certain?urban?areas?at?a?limited?time,?so?as?to?reduce?congestion,?pollution,?and?noise,?as?well?as?to?encourage?the?use?of?environmental?travel?modes.?The?origination?of?car?free?day?is?introduced;?the?green?traffic?and?the?necessity?of?car?free?day?is?analyzed.?Based?on?the?survey?data?of?traffic?volume?got?from?Yuzhong?District?in?Chongqing?which?implements?the?plan?of?car?free?day,?the?traffic?demand?forecast?and?implement?effect?of?car?free?day?is?discussed,?which?provides?some?scientific?guidance?for?corresponding?traffic?control?and?the?analysis?of?its?important?significance. References | Related Articles | Metrics

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Effect?of?Ultra-High?Change?of?Monorail?Horizontal?Curve?on?Traffic LIU Lang, YU Pei 2009, 28(3): 588-590.  DOI: 10.3969/j.issn.1674-0696.2009.03.28 Abstract ( )   PDF (199KB) ( )   Because?of?the?characteristics?of?the?monorail?lane?system,?the?requirement?of?track?circuit?indicators?is?relatively?lower?in?monorail?system?than?that?in?the?subway?system.?Therefore,?designing?the?lines?is?more?flexible.?The?adoption?of?the?ultra-high?can?be?greater,?the?curve?can?be?shorter?and?the?curve?radius?can?be?smaller.?Based?on?these?features,?when?vehicles?are?running?at?the?ultra-high?curve?sections,?the?effect?of?ultra-high?change?of?the?lane?on?the?vehicles?also?becomes?more?prominent.?The?intensity?of?turbulence?can?be?controlled?in?order?to?improve?the?smoothness?of?driving?by?decreasing?the?ultra-high?changing?rate. References | Related Articles | Metrics

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General?Law?of?Run-Off-Road?Accident?on?Expressway LiU Tang-zhi, , TANG Bo-ming, SHAO Dong, SU Liang 2009, 28(3): 591-593.  DOI: 10.3969/j.issn.1674-0696.2009.03.29 Abstract ( )   PDF (377KB) ( )   With?the?development?of?the?expressway?in?China,?the?traffic?accidents?caused?by?the?tiredness?resulting?from?the?long?time?driving?are?gradually?increasing.?According?to?the?analysis?on?746?ROR?（Run-Off-Road）?traffic?accidents?from?Yu-Qian?Expressway?（from?Chongqing?to?Guizhou?Province）,?Yu-Fu?Expressway?（from?Chongqing?to?Fuling）?and?Cheng-?Yu?Expressway?（from?Chongqing?to?Chengdu?）?ranging?from?2005?to?2006,?the?general?distributing?law?of?ROR?accidents?are?explored?from?five?aspects,?that?is?accident?amount,?accident?type,?accident?time,?automobile?type?and?highway?section?where?ROR?happened.?At?last,?the?necessity?and?urgency?to?implement?the?rumble?strips?on?expressway?in?large?scale?is?emphasized?;?furthermore,?some?suggestions?about?the?safety?administration?of?ROR?traffic?accidents,?the?selection?and?the?layout?of?rumble?strips?are?proposed. References | Related Articles | Metrics

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Guidance?Effect?of?Parking?Guidance?Information?System ZHANG Bao-yu, ZHANG Wei-quan, WU Ling-ling 2009, 28(3): 594-599.  DOI: 10.3969/j.issn.1674-0696.2009.03.30 Abstract ( )   PDF (307KB) ( )   In?order?to?quantitatively?analyze?the?effect?and?benefit?of?parking?guidance?information?system?and?offer?scientific?basis?to?the?decision-making?before?the?implement?of?parking?guidance?information?system,?firstly,?the?muhinomial?logit?model?of?parking?choice?model?with?the?whole?parking?information?after?guidance?is?introduced,?which?includes?four?influence?factors?of?parking?lots?attributes?;?and?then?the?parking?choice?model?without?the?parking?information?before?guidance?is?constructed,?which?includes?the?logit?probability?model?of?parking?route?choice?and?the?method?of?parking?lots?choice?through?transforming?converting?uncertain?parking?information?into?imperfect?parking?information.?On?the?basis?of?above?models,?an?actual?example?is?simulated?and?analyzed,?so?the?number?of?cars?on?the?each?section?of?street,?the?parking?utilization?rate?of?each?parking?lot?and?the?number?of?cars?waiting?for?parking?before?and?after?guidance?are?obtained. References | Related Articles | Metrics

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Research?on?Index?System?of?Evaluation?on?Maintenance??and?Service?Quality?of?Chongqing?Highway WANG Fang, , SU Xiao-jun, , HU Xing-hua, 2009, 28(3): 600-603.  DOI: 10.3969/j.issn.1674-0696.2009.03.31 Abstract ( )   PDF (196KB) ( )   Based?on?the?performance?requirement?of?highway?and?status?in?quo?of?Chongqing?highway,?the?evaluation?indexes?of?maintenance?and?service?quality?of?Chongqing?highway?are?selected,?and?the?quality?evaluation?system?which?is?simple,?predictable,?easy?available,?reliable?and?typical,?is?established.?Therefore,?this?system?can?help?to?solve?the?difficult?maintenance?problem,?to?improve?the?highway?service,?and?to?protect?the?users＇?legitimate?fights?and?interests. References | Related Articles | Metrics

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Mechanism?Analysis?on?Cavitation?Corrosion?of?Engine??Cylinder?Sleeve?and?Precaution?Measures ZHANG Jun, SI Hai-lin 2009, 28(3): 604-605.  DOI: 10.3969/j.issn.1674-0696.2009.03.32 Abstract ( )   PDF (193KB) ( )   The?main?cause?and?detailed?process?of?the?cavitation?corrosion?of?engine?cylinder?sleeve?are?elaborated.?And?the?mechanical?analysis?of?the?cavitation?corrosion?mechanism?of?cylinder?sleeve?is?carried?out.?With?the?consideration?of?the?rational?design?of?engine?cylinder?sleeve?and?piston,?the?repair?and?assembly?space,?as?well?as?the?design?of?cooling?system?and?the?proper?use?of?coolant,?the?precaution?measures?to?prevent?cavitation?corrosion?are?put?forward. References | Related Articles | Metrics

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Numeral?Simulation?on?Planar?2D?Flow?of?Jiangjin?Rentuo?Bridge BU Ding, YANG Bin 2009, 28(3): 606-608.  DOI: 10.3969/j.issn.1674-0696.2009.03.33 Abstract ( )   PDF (306KB) ( )   The?planar?2-D?mathematical?model?is?established?by?depth-averaged?finite?element?method.?The?current?field?of?Rentuo?District?in?Jiangjin?is?preferably?simulated?by?Galerkin?method?of?weighted?residuals?that?disperse?the?equations?and?Newton-Raphson?non-linear?iteration.?The?result?proves?to?be?reliable?and?satisfying?through?the?verification?of?actual?surface-line?and?velocity?of?flow?of?Rentuo?reach?in?Qijiang. References | Related Articles | Metrics

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Bed?Shear?Stress?in?Curved?Conduit?Flow TONG Si-chen, XU Guang-xiang, ZHONG Liang 2009, 28(3): 609-613.  DOI: 10.3969/j.issn.1674-0696.2009.03.34 Abstract ( )   PDF (630KB) ( )   The?bed?shear?stress?in?bend?flow?is?the?direct?motivation?for?sediment?initiation,?which?is?an?important?issue?for?hydraulic?engineers?to?concern?about.?A?generalized?curved?conduit?flow?experiment?is?employed?to?systematically?study?the?flow?characteristics?and?the?kinematical?law.?The?3D?flow?velocity?parameters?are?measured?by?adopting?the?ADV?（?Acoustic?Doppler?Velocimeter）.?Based?on?the?proposed?calculation?methods?of?water?surface?transverse?gradient,?longitudinal?gradient?in?curved?flow?and?depth?averaged?longitudinal?velocity?distribution,?a?set?of?formulas?to?compute?the?bed?shear?stress?in?bend?flow?are?theoretically?established.?Then?each?different?parameter?affecting?the?bed?shear?tress?is?calculated?independently?and?in?detail?to?obtain?the?distribution?pattern?of?the?bed?shear?stress.?Results?show?that?the?research?achievements?are?in?accordance?with?the?predecessors＇?findings?basically.?However,?it?is?relatively?more?systematical?and?ideal,?which?can?be?taken?as?the?basis?to?explore?the?hydraulic?characteristics?profoundly. References | Related Articles | Metrics

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Soft?Erosion?and?Extraction?of?Its?Influence?Factors??in?Complex?Topographical?Region PAN Jian-ping 2009, 28(3): 614-618.  DOI: 10.3969/j.issn.1674-0696.2009.03.35 Abstract ( )   PDF (876KB) ( )   The?extraction?of?soil?erosion?in?complex?topographical?region?is?much?more?difficult?than?that?in?flat?region.?RUSLE?is?the?most?widely-used?model?for?soil?erosion,?but?it?only?supplies?the?extraction?algorithms?at?normal?condition.?Therefore,?it?is?necessary?to?make?a?proper?modification?of?extraction?method?on?corresponding?erosion?factors?to?apply?RUSLE?to?the?complex?topographical?region?effectively.?The?extraction?method?of?topographical?factor?and?cover-management?factor,?which?are?affected?seriously?by?complex?topography?are?focused,?and?a?more?precise?extraction?method?is?proposed,?which?has?been?applied?to?the?experiment?in?Zigui?county?of?Three?Gorges?Reservoir?area.?The?test?results?indicate?the?algorithm?can?extract?the?soil?erosion?information?effectively. References | Related Articles | Metrics

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Optimization?of?Cigarette?Logistics?Deliver?Region?Partition??Based?on?Genetic?Algorithm WANG Yong, CHi Jie, FAN Jian-xin 2009, 28(3): 619-622.  DOI: 10.3969/j.issn.1674-0696.2009.03.36 Abstract ( )   PDF (294KB) ( )   On?the?background?of?the?cigarette?logistics?distribution?region?partition,?cigarette?logistics?distribution?region?is?divided?into?several?distribution?units.?Based?on?the?distribution?requirements?of?the?units,?deliver?cost,?the?fixed?cost?and?variable?costs?of?the?distribution?center?and?the?transfer?station,?the?operation?research?model?of?logistics?distribution?area?partition?planning?has?been?built.?The?variable?costs?include?distribution?costs?of?cart?transferring?from?distribution?center?to?transfer?station?and?distribution?costs?of?cart?from?transfer?station?to?customers.?Genetic?algorithms?are?applied?to?design?the?encoding?scheme,?selection,?crossover?and?mutation?operator?as?well?as?to?establish?computer?simulation?models?to?find?the?solution,?which?obtains?the?optimal?allocation?schema?of?the?cigarette?distribution?region?partition?and?solves?the?corresponding?problems. References | Related Articles | Metrics

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Optimized?Synergy?of?Dual?Channel?Distribution?for?Commercial?Chain?Store QiN Yan-hong, LIU Peng 2009, 28(3): 623-627.  DOI: 10.3969/j.issn.1674-0696.2009.03.37 Abstract ( )   PDF (221KB) ( )   Aiming?at?the?problems?existing?in?double?channel?distribution?of?commercial?chain?store,?the?model?of?optimizing?double?channel?distribution?is?proposed,?in?which?head?office?of?chain?store?cooperates?with?branches?in?dealing?with?electronic?order.?Then,?the?influence?of?the?synergy?on?sale?revenue,?stock?cost,?transportation?costs?and?profits?in?double?channel?distribution?is?analyzed?deeply?and?the?conditions?of?which?the?synergy?distribution?dominates?the?independent?distribution?are?investigated.?Therefore,?these?conclusions?can?offer?reference?to?decision-making?of?commercial?chain?store?to?optimize?double?channel?distribution. References | Related Articles | Metrics

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Application?of?Wireless?Bluetooth?Technology?Based??on?J2ME?in?Engineering?Mapping XU Yi, WANG Jia-wei 2009, 28(3): 628-632.  DOI: 10.3969/j.issn.1674-0696.2009.03.38 Abstract ( )   PDF (392KB) ( )   Bluetooth?technology?is?the?hot?issue?focused?by?the?domestic?and?overseas?research?institutes.?According?to?this?status?in?quo,?J2ME?supporting?to?bluetooth?protocol?suites?and?java?bluetooth?application?program?interface?are?introduced.?Wireless?bluetooth?application?systematic?architecture?based?on?J2ME?is?discussed?in?detail?and?the?specific?technology?to?realize?is?studied.?Software?implementation?scheme?of?application?of?bluetooth?in?engineering?mapping?is?proposed?and?tested?in?actual?project. References | Related Articles | Metrics

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Blind?Space-Time?Equalization?in?MIMO?System?Based?on?ICA BAO Xiao-lei 2009, 28(3): 633-636.  DOI: 10.3969/j.issn.1674-0696.2009.03.39 Abstract ( )   PDF (312KB) ( )   In?MMSE?equalization?of?Multiple-Input?Multiple-Output?（MIMO）?system,?imprecision?due?to?finite?sample?size?in?the?estimation?of?the?sensor?covariance?matrix?and?the?channel?matrix?has?a?negative?impact?on?the?detection?of?the?transmitted?data?symbols.?Independent?Component?Analysis?（ICA）?is?proposed?to?refine?the?conventional?equalizer?with?optimal?delay?calculation?method.?The?simulation?results?indicate?that?this?algorithm?possesses?better?robustness,?less?calculation?complexity?and?more?outstanding?equalization References | Related Articles | Metrics

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Estimate?of?Pulse?Upper?Bound?in?Time-Delay?BAM?Neural?Networks WANG Jian-jun, WANG Hui 2009, 28(3): 637-640.  DOI: 10.3969/j.issn.1674-0696.2009.03.40 Abstract ( )   PDF (197KB) ( )   The?exponential?stability?of?delayed?bidirectional?associative?memory?neural?networks?（?DBAM?neural?networks）?is?studied?and?the?influence?of?pulse?on?exponential?stability?is?focused.?The?result?shows?that?if?the?whole?exponent?of?non?-?pulse?DBAM?is?stable,?the?corresponding?pulse?system?can?remain?its?stability,?even?if?the?state?are?magnified?to?a?larger?scale?at?the?pulse?instant.?Furthermore,?the?pulse?upper?bound?and?pulse?interval?which?can?keep?the?exponents?of?the?system?stable?is?estimated,?according?to?the?degree?of?exponential?convergence?of?non-pulse?system. References | Related Articles | Metrics