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15 April 2007, Volume 26 Issue 2 Previous Issue    Next Issue

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Inquiry into Cracks in the W ebs of Curved Prestressed Concrete Box Girders CHEN Bo;ZHOU Zhi-xiang;LIU Ji-zheng 2007, 26(2): 1-4.  Abstract ( )   PDF (279KB) ( )   Based on the analyses of the reasons for the cracks produced in the webs of curved prestressed concrete box girders， a modified formula is ded uced for calculating the radial forces produced from the deviation ofthe location ofprestressing tendons，the further form ula is presented for checking the thickness of the webs and the other measures to avoid cracking in the webs are also discussed，which may be re,terence for the design and construction of such kind of bridge. References | Related Articles | Metrics

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Finite Element Analysis of Two New Types of Shear Connector in Composite Steel-concrete Beam ZHANG Xia;XIANG Zhong-fu 2007, 26(2): 5-8.  Abstract ( )   PDF (248KB) ( )   Two new types of shear connectors(i.e.PBL conector and embedded conector)and traditional bolt connectors are contrasted，and shear con ector of composite steel-concrete con ector is especially analyzed by FEA method.Analysis resuits indicate that anti-shear pin formed in two types ofconnectors plays a great role in resisting longitudinal shear ofcomposite beam。and the prope rest shear con ecter used for the construction is being pursued ，which Can be the foundation of such kind of building . References | Related Articles | Metrics

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Nonlinear Stability Analysis of Large-span CFST Arch Bridge CHEN Shi-rain ; ZHOU Ren.zhong 2007, 26(2): 9-13.  Abstract ( )   PDF (282KB) ( )   A spatial nonlinear model is established and the linear and nonlinear analyses of stability on a large-span CFST arch bridge are maken during its construction process and the serving phase through the Nastran structure analysis system. Discussions on various kinds offactors which would afect the stability of a CFST arch bridge are made.As a result.some important conclusions arc obtained ，which may be valuable for the design and construction of such kind of bridge. References | Related Articles | Metrics

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Study on Improving the W hole Rigidity of Prestressed Concrete Three-pylon Cable-stayed Spans TAO Neng-qian;WANG Fu-min 2007, 26(2): 14-20.  Abstract ( )   PDF (338KB) ( )   The intermediate pylon of three-pylon cable-stayed spans lacks back-stays to limit its longitudinal displacement， which makes the structure more flexible.As a result.its deformation is so considerable that the whole structure's rigidity fails to the request of deform ation tolerance.According to the analy8i8 of a blue print of a three-pylon cable-stayed bridge across the Changjiang River with the finite element software MIDAS，making use of the available methods at present，a suitable method to improve the rigldity of this three-pylon cable-stayed spans is brought forth，which can be applied in other eonstradions like this. References | Related Articles | Metrics

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Comment on the Usual Analytical Methods of Long Span PC Continuous Rigid Frame Bridge WANG Yun-tao;ZHANG Xue-song;GU An-bang 2007, 26(2): 21-23.  Abstract ( )   PDF (204KB) ( )   Based on the related references，the present research situation about the spacial stress analysis of continuous rigid frame bridges inland is introduced；the characteristics of diferent analytical methods，especially the present software used for simulation analysis in bridge construction are summarized and an alyzed，and the conclusion is put forward that it's necessary to conduct the secondary development to complete the entire process analysis of a bridge construction. References | Related Articles | Metrics

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Semi-analytical Solution for Longitudinal Vibration of Rigidity Supporting Pile YU Wen-ji 2007, 26(2): 24-28.  Abstract ( )   PDF (228KB) ( )   By using a soil modeling ofthree axes symmetry and considering three dimensions wave efect，the longitudinal vibration charaeterisitic is analyzed on condition that a vertical force being harmonious and stimulating force is loadoed upon the whole newel stake in the damping soil of homogeneous and detained materia1.The frequency domain response of the pile head，complex stifness and mobility can be obtained as wel1.According to the convolution theorem and the inverse Fourier transforms.a semi-analytic solution oftime domain response ofvelocity admittance is obtained on condition that a stimulating forces of a half sine pulsation. References | Related Articles | Metrics

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MatLab Application to the Matrix Deduction of Finite Element Stifnes ZHOU Shuixing;CHEN Shan-lin 2007, 26(2): 29-31.  Abstract ( )   PDF (140KB) ( )   MatLab has a strong symbolic operation function．With the example of stifness matrix of plane beam element，the application of deducing element stifness matrix is introduced in detail for the first time，and the symbolic operation procedure of plane beam element is developed，and the ope ration result is completely in accordance with the handicraft deduction．This method can further expand the application of deducing matrix to other elements even more complicated nonlinear element. References | Related Articles | Metrics

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Dihedral M ethod in Measuring Bridge Axial Alignment QIAO Dun;ZHOU Jian-ring;LIU Si-meng;Zhen Zhi-ming;Tan Yong 2007, 26(2): 32-35.  Abstract ( )   PDF (189KB) ( )   The bridge axial alignment is a key point to bridge bearing capacity evaluation。disease analysis，health analysis and taking-over inspection．However，the routiile technique is cosily both in time and in finance，and what's more，the preciseness of the inspection Can’t be guaranteed．Taking the main arch axial alignment of an existing arch bridge as an exanlpie， the dihedral method in measuring bridge axial alignment is introduced.The experiment proves that the discussed technique is reliable，precise，simple and practica1. References | Related Articles | Metrics

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Study on Mechanical Coeficients of Anchor Cables by Experiment LIU Hua-tai;ZENG De-rong 2007, 26(2): 36-39.  Abstract ( )   PDF (207KB) ( )   Based on expounding the importance of mechanical coeficients for anchor cables design，some methods and steps which are used to get mechanical coeficients of anchol"cables are presented．and the criterion of losing efficacy in anchor is slven.An example is put forward with useful process record and data ofthe experiment which induce some methods and conelusions， which may be used for reference in other design and construction like this. References | Related Articles | Metrics

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Application of Slippery-frame Pours Mould Technology to the IIigh-pile、vith Hollow-thin W al ZHU Yu-li;YANG Li 2007, 26(2): 40-43.  Abstract ( )   PDF (164KB) ( )   The technology of slippery-frame pours mould in the high-pile with hollow-thin wall of Shangyang Bridge in Fujian Jinoeu Expressway is introduced．The bridge combines the advantages of slippery mould and turning over mould，guarantees the construction speed and quality ofthe project.and meets the appearance quality requirement of mound body as wel1.The application prospect of the technology is put forward according to the construct/on efect and the characteristics of slippery frame po urs mould. References | Related Articles | Metrics

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The Role of Ultrasound Test Technology in Construction Quality Control in the CFST Arch Bridg LIU Xiao-yu 2007, 26(2): 44-46.  Abstract ( )   PDF (198KB) ( )   The pressure quality of CFST is the key to guarantee the whole quaty of a CFST arch bridge.The basic method and principle of ultrasound test technology are introduced.As an example．this technology was appled in Heyang Jialing River CFST arch bridge to chek the structural me mber for any imperfect quality problem．such as uncom pactness and cavity or gap.It proves that the ultrasound test technology plays an important part in CFST bridge for quality control of a construction project. References | Related Articles | Metrics

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Construction Control of the Xiaoanxi Continuous Rigid Frame Bridge CHEN Si-tian;ZHAO Li-li;GONG Shang-long;LIU Shui 2007, 26(2): 47-50.  Abstract ( )   PDF (211KB) ( )   The construction control of continuous rigid frame bridges by the segmental cantilever method is studied in the light of engineering practice of Xiaoanxi bridge，and the feasible control methods are proposed.Futhermore，the influence of shrinkage and creep on the large-span bridge during its service is specially an alyzed.An additional camber with shrinkage and creep is counted in.The better connecting precision is acquired，the smoother line-type of the bridge is formed. References | Related Articles | Metrics

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Stability Study of Kuimen Bridge in Construction Stage XIAO Guang-hong;ZHANG Qiu-ling 2007, 26(2): 51-52.  Abstract ( )   PDF (149KB) ( )   The model of Kuimen bridge is built and the linear analysis and non-linear analysis of stability are conduct，and the comparison of them is maken through the finite clement software MSC-Nastran.The analyses results showthatitis practical to evaluate the stability of cable-stayed bridg with non-linear analysis. References | Related Articles | Metrics

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Discussion on Durability Design of Concrete Bridge Structures CAO Lie-fang 2007, 26(2): 53-56.  Abstract ( )   PDF (286KB) ( )   Concrete structures will be deteriorated and damaged because of the natural environment and the long-term usage. The deterioration of the structural behavior and the damage inside the structure always afect the safety an d suitability of a bridge secture.Therefore，the durability of structure is one of the important objectives for the reliability of engineering structures.In design calculations，besides considering bearing capacity，flexibility control and crack control，durability design must be considered. References | Related Articles | Metrics

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Analysis on the Aesthetic Elements of Lower Structure of Suspended Bridge CHEN Zheng-bin 2007, 26(2): 57-60.  Abstract ( )   PDF (235KB) ( )   The relationships among aesthetic elements of urban bridge structures are expounded.Taking the lower structure of suspended bridges as an example，aiming at the problems in the design of structural aesthetic factors，the idea is put forward that visual artistic value should be taken into account when an urban bridge is designed，which is of certain applied significance in bridge design. References | Related Articles | Metrics

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The Method for Simulating& Assembling the Arch Bridge Axes by Observation Data XU Xi 2007, 26(2): 61-63.  Abstract ( )   PDF (165KB) ( )   Aiming at the situation that a kind of 3 holes arch bridge lacks the data of engineering and construction，an easy method that how to simulate and assemble the arch bridge axes by observation data is brought forward． References | Related Articles | Metrics

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Research on the Planning and Layout of Chongqing Belt Freeway Interchange SUN Jia-si 2007, 26(2): 64-66.  Abstract ( )   PDF (208KB) ( )   Baaed on the research on planning and layout of Chongqing belt freeway interchange，the thorough study on the outer belt freeway，S layout，sr~te，technique condition，type and plan is siren，and some opinions and proposals about several key technologies ofthus subject are put forward. References | Related Articles | Metrics

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Interception Capacity Calculation of Inlet in Surface Drainage LI Zhi-yong;MEI Ying-jun 2007, 26(2): 67-71.  Abstract ( )   PDF (224KB) ( )   Using hydraulics principle and experiential equation，diferent gutters and inlets are alalysed deeply.To gutter，the equation of single section and composite section to compute water flux is confirmed；To inlet，interception capacity afected by water flux in gutter，crofts slope，longitudinal slope and depressed gutter is considered.Based on the result，the interception capacities on grades ofdiferent inlets in diferent conditions are confirmed，and at last，the right type of gutter and inlet in pavement surface drainage design is commended. References | Related Articles | Metrics

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Analysis of the Ultraviolet Aging of SBR M odified Asphalt Mixture WU Huan;LIANG Nai-xing 2007, 26(2): 72-74.  Abstract ( )   PDF (142KB) ( )   The illumination aging contrastive test of the hot asphalt mixture is introduced on the condition of scattered pavement by using ultraviolet hish-pressure mercury lamps，which simulates the aging circs ofthe hot asphalt mixture illuminated outside in Tibet.The changes of cleavage strength of SBR modified asphalt mixture and base asphalt mixture can reflect the rule that the asphalt mixture changes with time by using ultraviolet aging at diferent time.The test validates that SBR medifled asphalt mixture has beter capability to withstand ultraviolet aging.It shows that SBR modified asphalt mixture pogges~ beter road property in Tibet. References | Related Articles | Metrics

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Study on the Influences of Gradation on the High Temperature Stability Performance of Asphalt Mixture QIU Ying-feng;XU Zhi-hong;HUANG Qi-sh 2007, 26(2): 75-79.  Abstract ( )   PDF (245KB) ( )   Based on the SAC gradation theory and SMA skeleton judge standard。from the ansh of the mixture skeleton’S dense situation，the influences of three factors induding the coarse，separating aggregate contents and void mixture on the hligh temperature stability peforman ce are analyzed.Result shows that the content of separating part of the aggregate has strong efect both on the mixture’S skeleton construction and on the compaction pe rformance，an d on the mixture’S skeleton and dense degree are relevant to the hi gh temperature stability pe rformance in a kind of parabola rule. References | Related Articles | Metrics

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Eexperiment Research of the Pavement Structure of the Low Cost County Roads in the Test Slots WU Yao-dong;WEI Jian-ming;HE Zhao-yi 2007, 26(2): 80-84.  Abstract ( )   PDF (203KB) ( )   The typical pavement structure models of the low county roads are built in the test slots.The actual work condition of the pavement is imitated by acquiring a large quantity of loading and the breakage pocess in experiments.Th e related function parameters,such as the stress stain mt depth，are measured by the experiments and mseareh testifyings in the test slots in order to establish whether the four kinds of pavement structure Can satisfy the cowgirl transportation level requ ests or not.Th e pavement structure guidebook that are established by the actual roads build experiments is reasonable on the technique. References | Related Articles | Metrics

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Study on the S-RAFC M ultiplex Pavement M aterial ZHANG Hong-feng;MENG Yun;QI Zhi-he 2007, 26(2): 85-88.  Abstract ( )   PDF (200KB) ( )   A new type of semi-rigid pavement material called S-RAFC is introduced, whose pe rformance is between that of the cement concrete and that of the asphalt concrete.The crumbly coeficient(Ra/crt)is from 3 to 5，and it call satisfy the requirements of diferent pavement structures in enduring pressure by adjusting the dosage of special additive and the gradation. Test road validates that the S-RAFC，so a new type of multiplex pavement material，owns better using perform ance through its sample experiment inside. References | Related Articles | Metrics

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Distress Reasons for the Concrete Pavement and Its Repair Design XIAO Wen;YANG Bo;LIU Li;XU Yong-jiang 2007, 26(2): 89-94.  Abstract ( )   PDF (278KB) ( )   Through the investigation of the current distress of the concrete pavement，the distress reasons are presented.On the basis of the patterns of the concrete pavement distress，how to repair for each model is set forth.Finally， requirements of the construction and the major materials are prescribed for each patern in order to guide the repair of the concrete pavement. References | Related Articles | Metrics

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Discussion on the M ethods of Soft Foundation Treating in Road — — the Treating of Line 3 1 0 Lan·bar Reconstruction ZHANG Wen ；ZENG De-rong 2007, 26(2): 95-96.  Abstract ( )   PDF (149KB) ( )   Some methods are presented including the combinations of blind ditch and renew soil.of blind ditch and geogrid ctlshlon，and of lengthwise and transverse blind ditches，which are used to deal with soft foundation in road according to diferent situation，and these methods have been used in State-line 310 whose results are good. References | Related Articles | Metrics

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Application of Re-dynamic Compaction Technique to High Embankment of Yu-Lin Expressway WANG Chun-mei;HU Ji-1ong;HOU Yan-feng 2007, 26(2): 97-100.  Abstract ( )   PDF (279KB) ( )   The soil and rock aggregate mixture embankment,filled with the mudstone，sandstone and shale which are commort in Chongqing.is expounded as the research elements.The test ascertains the tamping parameter and standard of re-dynalnic compaction after heavy tamping.SO as to instruct the construction of Chongqing Yu-Lin Expressway and achieve the expected results. References | Related Articles | Metrics

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Influences of M ixing M ethods and M odel Temperature on Performance of the Polyester Fiber·enhanced Asphalt Concrete WU Guo-xiong;ZHANG Yuan-hang;WANG Ai-min;ZHANG Da-ke;ZENG Rong-bin 2007, 26(2): 101-103.  Abstract ( )   PDF (175KB) ( )   The mode1.temperature in road construction is simulated by multi-index orthogonal test，and the characteristics of three mixing methods including the dry-mixing method,wet-mixing method and compound-mixing method are elaborated， and the efects of diferent mixing method s and model temperatures on Marshall index of fiber-enhanced asphalt concrete are allalysed in Marshall test.At last，some advices on the production and construction of the fiber-enhanced asphalt concrete are given. References | Related Articles | Metrics

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Influences of Construction Machinery Fleet Configuration on Temperature Segregatio LIU Tang-zhi 2007, 26(2): 104-109.  Abstract ( )   PDF (269KB) ( )   The causes of temperature segregation are analyzed on the basis of asphalt concrete pavement construction technics. According to the theory on construction machinery flet configuration，the measures of mitigating temperature segregation and evaluation criterion of optimizing machinery flet confi guration are put forward. References | Related Articles | Metrics

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The First Test Road、 th Environmental Protection in Chongqing LU Bo;LIU Zhi-jun;CHEN Nu;LIN Kun;WANG Guang-an 2007, 26(2): 110-113.  Abstract ( )   PDF (290KB) ( )   The burned garbage and the abandoned plastics，as the study object，shall have been changed into a list of road mao terials by means of reseal"chtest，development and design.By applying the m into the road structure，the structural work func。 fion of the road increases.This kind of work embodies environmental protection.reproductive and recycle economic idea，emerges a social performance and the engineering performance an d also suits the sustainable development of economics in the 21 st century. References | Related Articles | Metrics

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Research on the Development Trend of Road Greening and Landscapes Designing ZHONG Ning 2007, 26(2): 114-116.  Abstract ( )   PDF (228KB) ( )   The importance and the basic thinking of road greening and landscapes designing are brifly approached.The present problems of road landscape design inland are analyzed，and some measures based on the relationship between road and ecology environment are set forth. References | Related Articles | Metrics

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Genetic Analysis of Jinghong Shallow in Lancang River and Its Regulation Principl WU Song-ren;WU You-ren;QIN Zong-mo 2007, 26(2): 117-121.  Abstract ( )   PDF (364KB) ( )   The general situation of Jinghong waterway is introduced，and the cumulated rate of sand transport and the dominant discharge for channel formation are calculated.and the causes of the form ation of Jinghong shallow as well as it g evolution trend are analyzed，an d the regulation principles for relevan t readers are put forword. References | Related Articles | Metrics

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Theoretic Research on Investment Share of Water Resources Development Project CHEN Ye-ying;LIU Jian-ming 2007, 26(2): 122-126.  Abstract ( )   PDF (250KB) ( )   Based on the traditional investment share method，taking the multi-purpose dam as an example under the Game theory，the conditions an d methods of dividing the investment share properly，espcially between diferent administrative bodies are explored，which could be a beneficial example of implementation. References | Related Articles | Metrics

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Research on the Influences of Jialing River Caojie Shipping& Hydroelectric Station Project on Yu-He Highway ZHANG Xue-jin;LIU Lang 2007, 26(2): 127-130.  Abstract ( )   PDF (211KB) ( )   The influences of Jialing River Caojie shipping＆hydroelectric station p~ect on the main constructions of Yu·he Highway are briefly introduced.and some computing models for analyzing the stability of the roadbed arc built. References | Related Articles | Metrics

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Efect of NM Level CaCO3 on Performance of the Concrete in Drying-W etting Cycle in Corrosive EnVironments LI Gu-hua;GAO Bo 2007, 26(2): 131-135.  Abstract ( )   PDF (292KB) ( )   Regarding fly ash concrete as normal basis，the performances of concretes with am level CaC03(NC)tire investigated in dring-weting cycle in corrosive environments.The result shows that comparing with normal concrete，after 70 and 110 times drying-wetting cycle.modulus ratios of drying-wetting cycle in corrosive environments of the concrete with 1％ NC have increased by 11％ and 13％ respectively.Too much NC in concrete would decrease the durability of the concrete.Fi— nally，the mechanism for the concrete with NC is discussed. References | Related Articles | Metrics

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Researeh on Risk Management of Public Works Implement PFI r3mnc~ Pattern in Chin ZHENG Liang;ZHOU Zhi 2007, 26(2): 136-139.  Abstract ( )   PDF (255KB) ( )   Embarking on the basic principle of PFI finan cing pattem and its operational mechanism，the PFI project risk is analysed carefully by using the related theory of project financing and risk management.The PFI projoct risk management strategy and related meastures based on the sharing principle and mechanism of the PFI projeet risk are put forward.in order to benefit the development of PFI project in our country. References | Related Articles | Metrics

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Study on the Trafi c Impact Assessment of Construction Project in New Developing Region and Its Application PAN You-cheng;MO Hai-bo 2007, 26(2): 140-144.  Abstract ( )   PDF (272KB) ( )   The characteristics of trafic impact assessment of construction project in new developing region are discussed，and the method of making the assessment is put forward and demonstrated in detail.By using the case of Ningbo Guoda Radisson International Center，the objectivity and feasibility of the trafic impact assessment method in new developing region is demonstrated. References | Related Articles | Metrics

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Exploration of Fiduciary Duty Istitution Bi~ng for Highway Projec ZHANG Hai-bin;XU Jian-pin 2007, 26(2): 145-148.  Abstract ( )   PDF (208KB) ( )   The prequalification of bidders，evaluating methods and contract clause of the fiduciary duty institution bidding for highway projeet are discussed. Meanwhile.the suggestions on supervision and management for govemment on the fiduciary duty institution bidding ale：persecuted. References | Related Articles | Metrics

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Identification and M anagement of Increasing Unit Price in Expressway Costruction CHEN Shi-li;LIU Fang-qiang;GONG Hong-bing 2007, 26(2): 149-150.  Abstract ( )   PDF (141KB) ( )   Based on the situation about highway costruction in China，the appearing leasons，approving procedure and the identifying methods of the increasing unit price in highway costruction are discussed. References | Related Articles | Metrics

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Research on Safety Technology Plan of Expressway Charging Online System LI Shi-jiao;LI Shu-qing 2007, 26(2): 151-154.  Abstract ( )   PDF (215KB) ( )   Based on the safety problem of Chongqing expressway charging online system before the system rebuilding and on the practical situation during the actual rebuilding，the system physical safety，charge software satety，data transmission safety，internet virus safety and other safety techniques are briefly stated，and the safety technology plan ofthe expressway eharging online system is elementarily built. References | Related Articles | Metrics

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Modeling Method Based on the Zachman Framework for the Requirement Engineering of Information System FANG Cheng 2007, 26(2): 155-159.  Abstract ( )   PDF (241KB) ( )   It is necessary to set up requirement model from multi—angles for describing the essence roundly an d exactly of in· formation system.A modeling method based on the Zachman framework for the requirement engineering of inform ation system is proposed，the mod els for describing requirement from many diferent aspects are constructed，and the modeling fram ework for analyzing the information system requirement is formed.There are four exeellenees of this framework：multi-views，agility in answering changes，being irrelevant to technology ，and eficient integration of the modeling methods in existence. References | Related Articles | Metrics

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Optimality Conditions for the Weak Eficient Solutions to the Set-valued Optimization Problems in Ordered Linear Spaces WANG Qi-lin 2007, 26(2): 160-163.  Abstract ( )   PDF (162KB) ( )   The(u，02；Y+)-generalized subconvexlike set-valued maps are introduced，and the alternative theorem of the maps is established in ordered linear spaces.Applying the theorem，the optimality necessary conditions and suficient condi· tions for the weak eficient solutions to the set-valued optimization problems with generalized inequality constraints are ob· rained in ordered linear spaces. References | Related Articles | Metrics

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Convergence of Multistep Iterative Sequence for Asymptotically Quasi-nonexpansive Mappings of Set-value LIAO Zheng-qi;HE Qing-bi 2007, 26(2): 164-166.  Abstract ( )   PDF (116KB) ( )   By using point valued for set-valued mappings in strictly convex Banach space，a suficient and necessary condition for Ishikawa muhistep iterative processing with errors for asymptotically quasi-nonexpansive mappings of set-valued to converge to coupled fixed point is proved. References | Related Articles | Metrics