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15 February 2006, Volume 25 Issue 1 Previous Issue    Next Issue

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Influence of webs inclination on mechanical behaviors of box girder with corrugated steel webs HU Xu-hui， GU An-bang， XU Jun-lan 2006, 25(1): 1-3.  Abstract ( )   PDF (166KB) ( )   The box girder with corrugated steel webs is a new type of composite steel- concrete structure. Combine to it' s structure feature, analysis the mechanical behaviors of the different inclination of webs according to the finite element program. Compared with the finite element model' s deflection、f lexural stress and shear stress in different inclination of webs, it can make some conclusions that can provide theoretical foundation for bridge design and construction in future. References | Related Articles | Metrics

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The analysis of initial stress about stability and bearing capacity of Zhongshan Bridge YU Hong-gang， ZHOU Shui-xing， CHEN Qiang， XIAO Jun-liang 2006, 25(1): 4-7.  Abstract ( )   PDF (217KB) ( )   In terms of constitutive relation of existed initial stress concreted??filled steel tubular, author analyses the influence of initial stress in concrete-filled steel tubular arch bridges. The results show initial stress reduces stability and bearing capacity of concrete-filled steel tubular arch bridge; the influence of initial is not equal to different load conditions. These conclusions offer reference for thorough study of the initial stress in large span concrete??filled steel tubular arch bridges in future. References | Related Articles | Metrics

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Discussion for design and principles conformation measures of durability of concrete bridges WU Hai-jun，PENG Zuo-jun， LU Ping 2006, 25(1): 8-10.  Abstract ( )   PDF (162KB) ( )   It has been verified that key factor influencing structural durability is the defect in structural conformation and system except for the material durability. But the problem is seldom mentioned in the durability study for concrete structures. In this paper, suitable approaches and measures for the robustness, repairability, examinability and waterproofing performance of bridges are discussed to ensure the durability of con?? crete bridges. References | Related Articles | Metrics

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Analysis of abutment sidewall failure mechanism for solid arch bridge on curve LIU Wen-fang， XIAO Sheng-xie，WANG Zhao-hui 2006, 25(1): 11-13.  Abstract ( )   PDF (154KB) ( )   According to the condition of a bridge, a finite element was established to explore the potential failure mechanism of abutment sidewall cracking and sliping. Soil pressure was combined with live load and potential centrifugal force that might be generated due to small radius curve at the beg inning of the bridge, to simulate the most critical load condition. The results indicated ex cessive tension stress due to bending might had caused initial cracking and sliping in service. References | Related Articles | Metrics

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The disease analyze and reinforcement enhance of a truss stone arch bridge ZHANG Min，CHEN Shi-min，HU Mian-yi 2006, 25(1): 14-18.  Abstract ( )   PDF (262KB) ( )   The reinforced concrete and pre-stressed concrete truss arch bridges were 1argely built in China，otherwise truss stone arch bridge was rarely constructed．The inherent causes have been discussed for Tianchi Bridge which is atruss stone bridge．The method of adding to reinforced concrete arch with 3-fibs to reinforce and strength the orginal arch bridge was put forward according to approximate formula about one order self-vibration frequency．To ensure the excellent link with the two arch interfaces。the method with firstly remove pavement then recon struct it was adopted．The capacity standard was impmved from truck-10 to truck-20．The static and dynamic calculation for before and after reinforce have been performed by Nastxan．The results show the self-vibration frequency was effectively improved and the capacity was achieved．At last．the construction key was given． References | Related Articles | Metrics

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Simply discussing the drill fiat roof construction technique character of Sutong bridge’s north main pier ZHANG Gang，LI Kang，WU Jin-liang，SHEN Gang 2006, 25(1): 19-23.  Abstract ( )   PDF (385KB) ( )   In allusion to SuTong dridge’s condition of deep water and rapid flow，This paper summarizes a character giving up traditional steel pipe stake supporting flat rod，using steel canister as supporting component directly and using cantilever orientation guide frame to construct plat roof．This character has paid important role to ensure bridge quality and shorten time limit for the project． References | Related Articles | Metrics

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Monitoring during the exit NATM constretion of dongmenguan tunnel XU Lin-sheng 2006, 25(1): 24-26.  Abstract ( )   PDF (157KB) ( )   The site monitoring was made during the exit construction of Dongmengnan highway tunne1.By means of the monitoring and detailed analysis for eaeh construction stage，feedback controlling desin is realized and the NATM construetion is controlled． References | Related Articles | Metrics

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Determination of rock resistant coeficient in road tunnel based on unified strength theory TU Zhong-ren 2006, 25(1): 27-30.  Abstract ( )   PDF (151KB) ( )   Based orithe unified strength theory，the formula for calculating rock resistant coefficient is given in the paper,which can be adopted to consider the intermediate principle stress effect and to obtain rock resistant coefficient in other situations or strength thoeries simply by as． sumed the parameter in the formula．So the formula can be applied in kinds of rock conditions． References | Related Articles | Metrics

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Study of polypropylene fiber at controlling concrete crack LV Yu-rong，LIANG Nai-xing 2006, 25(1): 31-34.  Abstract ( )   PDF (306KB) ( )   Since there is cement ooncrete，the crack problem have had been obsessing people．The existence of crack not only affects the appearance the building，but also influences the rigidity ofthe construction number and the capability of the whole structure，pursuantly it affeets the normlal usage of the building．So how to resolve this problem becomes the focus of people's attention gradually．This text has analyzed the concrete crack type and the cause of the crack in brief，and given an experiment on the cement sand syrup，the result has proved that the effection of the polypropylene fiber is remarkable． References | Related Articles | Metrics

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Outline of research in the reason of the rural cement concrete pavement fissure an d the prevent BIAN Jia-min，HAO Xiu-min 2006, 25(1): 35-37.  Abstract ( )   PDF (229KB) ( )   This paper comprehensively introduce the outline of research in the reason of the rural cement concrete pavement fissure and introduee something about the prevent in rural cement concrete pavement． References | Related Articles | Metrics

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Causation of cement concrete pavement damage and countermeasure against it WANG De-hong 2006, 25(1): 38-39.  Abstract ( )   PDF (181KB) ( )   Based upon detailed analysis of the causadon of cerment concrete pavement damage．this paper focuses on the countermeasure against it．To solve the problem，the author proposes 3 ways，which are tacking a layer of asphalts concrete，grouting neat cement or cement mortar under the pavement slab，rehabilitation of the broken pavement slabs． References | Related Articles | Metrics

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The study about technique standard of the village highway in developing and protecting YE Qiao-ling，ZHANG Ming-qing 2006, 25(1): 40-43.  Abstract ( )   PDF (237KB) ( )   This text primarily introduced the problem and characteristics of the current village highway，for make the funds of build road to get the reasonable and valid exploitation．to distribute to flick its function，and sive the favor to the farmer，we must choose the seasonable technique standard in the work of developments and protection． References | Related Articles | Metrics

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Parameter study of the ameliorative effect of polymer cement concrete YAO Hong-yun，LIANC Nai-xing，SUN Li-jun，MENG Jing-yu 2006, 25(1): 44-47.  Abstract ( )   PDF (229KB) ( )   This paper puts forward flexibility coefficient to evaluate the ameliorative effect of polymer cement concrete because many coefficient such as increasing percent of intensity of tension and the ratio of intensity of compression and tension can't appraise it wen．And this paper tests and computes flexibility coefficient of polymer cement concrete．Last this paper shows the flexibility coefficient can estimate the rupture property of polymer cement concrete by the relativity of flexibility coefficient and rupture property． References | Related Articles | Metrics

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The relationship between the conventional index and SHRP performance index of SBS modified bitumen RAO Xiao-yu,ZHOU Jin-chuan，ZHANG Yong-xing,ZHANG Zhi-qiang 2006, 25(1): 48-51.  Abstract ( )   PDF (192KB) ( )   With four types of representative domestic road bitumen used to highway traffic and four types of specitled road bitumen modifiers, sixteen SBS modified bitumens were prepared through high-shear modifying technique in the laboratory．The high—low temperature performance of SBS modified bitumens were characterized using conventional methods and SHRP test methods，Based on analyses of test result，This paper demonstrates the relationship between the conventional index and SHRP performance index of SBS modified bitumen. References | Related Articles | Metrics

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The research on mixture ratio of lime-flyash stabilize macadam SONG Ren-WH，LI Wen-guang，HE Zhao-yi 2006, 25(1): 52-57.  Abstract ( )   PDF (257KB) ( )   How to compensate the lacking of lime-flyash stabilization aggregate as base course material and how to improve the useful capability of highway were more and more concentrated．According to choose 9 mixtuures which are composed of different lime-flyash content and diferent aggregate gradation，regulations of mechmnics capability and shrinkage capability can be found by series of experiments and analyses about sev— eral factors such as binder content，graded style and curing time ．Meanwhile，based on these regulations，the gradation and composition of the lime-flyash stabilization aggregate which are satisfied the requires of base course's strength und shrinkage capability can be proposed． References | Related Articles | Metrics

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Application of non-contact counter in roadways fatigue test MA Ke-nan，MA Chao，LI Bin 2006, 25(1): 58-60.  Abstract ( )   PDF (175KB) ( )   One main content of the roadway fatigue test is to let vehicles to roll over and over on the roadbed,and to count the roiling numbers as the important parameters for synthesis analysis．The ordinary method for roadway fatigue test is using manual counter or electronic counter controlled by mechanical switch．Ofter having investigated the disadvantages of above-mentioned methods，This paper introduced a non-contact counter with advanced principle and excellent performance．This method has been proved practically better． References | Related Articles | Metrics

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The prevention and cure of the filling sub-grade groundwater seepage in the moun tain area ZHANG Hong-ju，LING Tian-qing，YANG Hui-li 2006, 25(1): 61-64.  Abstract ( )   PDF (184KB) ( )   Staring with the practical engineering，analyze the hazard and ruin that the groundwater seepage brings to the road surface．Ascer tain the distance which the groundwater seepage enters into the filling sub-grade by the mechanics calculation.Put forward the method of pre— venting and curing the groundwater infiltrates into the filling sub-grade in the mountain area. References | Related Articles | Metrics

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The actuality and prospect of the mechanism research in dynamic consolidation ZHOU Shi-liang，WANG Jiang，ZHANG Ming-qing 2006, 25(1): 65-70.  Abstract ( )   PDF (356KB) ( )   The application of dynamic consolidation in civil engineering is introduced ，its basal principle is analyzed ，the research actuality on the mechanism of dynamic consolidation and its limitation are summarized，finally，solne key topics of its forther research is put forward-The mechanism of dynamic consolidation can be studied systematically with the porous media theory and appropriate dynamic elastic-plastic constitutive model of soil，the unification between saturated soil and unsaturated soil should be realized；besides，the liquefaction failure theory is an important content in studying on the mechanism of dynamic consolidation． References | Related Articles | Metrics

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The analyse of usual defects among the widening projects of new and old roadbed ZHOU Yu，XIAO Yu-min 2006, 25(1): 71-74.  Abstract ( )   PDF (282KB) ( )   Firstly，the usual defects among the many roadbed widening projectsis analysed，andthen,theIeasonisfound Out for the breakage of road surface fabric which infected by the asynchronous distortion and the difference of settlement of new and old roadbed，finally，this result is confirmed by the field testing on the project of roadbed widening in chongqing， References | Related Articles | Metrics

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Application research of mixing anchor structure in road moat side slope consolidate XU Yun-hua，ZHOU Xiao-ping，LIU Jia-lin，LI Hua-chao 2006, 25(1): 75-77.  Abstract ( )   PDF (205KB) ( )   Yunnan Zhaotong-Daibu highway(11contract red stone rock section K314+550一K314+700)side dopes consofidation，since geology is special，side slope is high steep，is prepared with the anchor rod of prestressing force，fight Gou protect the mixing anchor of slope and the note technology of high voltage of thick liquid firm1y structure．With G-slope software for consofidating is former and consolidate the stability of rear road moat side slope imitate and analyse，analysis result shows，adopts the method of consolidating in writing，it is betterto consolidate rear slope bndy stability，it is various to consolidate structure to form a organic whole，so，make the stability of slope body have gotten effective contro1． References | Related Articles | Metrics

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Research status and trend for seepage of slope TANG Hong-mei,CHEN Hong-kai，GUAN Ming-fans 2006, 25(1): 78-83.  Abstract ( )   PDF (387KB) ( )   As one important division of Geotechnical mechanics，seepage mechanics make usually key action on safety and stability of slope．Based on analyses in detail to research documents，authors generalize these results as five parts in this paper，i．e．seepage model，seepage calculationmethods，coupling between seepagefield and stressfield，free surface，of seepage and permeability．Further，key content and basic ideal every part are discussedinthe paper．Takingbank slope of the Three Gorges reservoir as an example．research trend of bank seepage are provided． References | Related Articles | Metrics

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Water and soil erosion in highway engineering and control thinking FANG Dan，ZHANG Xu-jin 2006, 25(1): 84-86.  Abstract ( )   PDF (255KB) ( )   As higheoad growing in number increasingly of blilding scale and amount in our country，the water and soil erosion also becomes more serious along the road line day by day．The water and soil erosion is the most important environmental problem that is made by highway engineering．This article elaborate the feature of water and soil erosion，the reasons of water and soil erosion and a series of harmful effects that are aroused by them in the highway engineering in details,at last make a brief introduction to the control means of water and soil erosion． References | Related Articles | Metrics

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A study on force-resistance relationship of smart concrete ZHANC Ben-niu． ZHANG Kai-hong 2006, 25(1): 87-89.  Abstract ( )   PDF (148KB) ( )   This paper is dedicated to introduce the concept of the smart concrete．Meanwhile the theory analysis and experiment on the forceresistance relationship of the smart concrete are emphasized． References | Related Articles | Metrics

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Research on the factors which influece high-grade road cost of building LIU Lang 2006, 25(1): 90-92.  Abstract ( )   PDF (158KB) ( )   The opcratoin of high-grade road engineering project needs to take use of many essential factors and various conditions．Therefore，it will be affected by many factors．The main favors whwich affect investment amount of high-grade road include society，politics，economicenvi roment，gerngraphy enviroment(topography，geology hydrology)，road grade，transportation conditions，development policy，fund source，lane cost，standard gouta charge，price of material and equipment etc．This article will describe these influence qualunece qualitatively． References | Related Articles | Metrics

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Evaluation of level of service for highway network on computer simulation LI Jia，HE Han-hui，CHEN Ming 2006, 25(1): 93-98.  Abstract ( )   PDF (213KB) ( )   The current evaluation methodology of Level of Service(IDS)is respectively carried on the segments，intemections and weave sections． For highway network，there is not a unform criteria and a practical methodology to evaluate LOS．This paper presents a new methodology to evaluate LOS of highway network by traffic simulation technica1．Two index parameters are used in the proposed method：the average speed and the degree of saturation(v／e)．The method is applied to the evaluation of a highway network with the aid of traffic simulation software TSIS．From the example，it can be concluded that it's practicable to evaluate the network LOS with uniform method．The method is simple in principle and practical for application． References | Related Articles | Metrics

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Safety analysis method on freeway on-ramp merging area ZHANG Xiao-dong,GUO Zhong-yin，GAO Jian-ping,JIANG Rui 2006, 25(1): 99-102.  Abstract ( )   PDF (260KB) ( )   On-ramp merging area of freeway is general accident-prone section．In this area,vehicles are used to be involved in two kind of risks：car-following risk and lane-changing risk．Based on critical acceleration and its physiological and psychological characteristics on driver， this paper advances a model to calculate car-following risk index and lane-changing risk index． which a used to mesure the risk of a single traffic behavior．Then，the concept of average risk is presented to evaluate the safety level of on-ramp merging area References | Related Articles | Metrics

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Trafie information collection method based on image manipulation GAO Jian-ping,ZHANG Xiao-dong,JIANG Rui 2006, 25(1): 103-106.  Abstract ( )   PDF (271KB) ( )   Based on the introduction of image identification，this paper puts forward the method of grid conversion and then establishes the rela． fionship between file image coordinate and tile plane coordinate．Thus the traveling track of the runing vehicle in the image can be got,so that it can get the rea1-time speed and position of the vehicle，and achieve the purpose of traffic information collection． References | Related Articles | Metrics

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Applications of genetic algorithm in traffic equilibrium assignment ZHAI Chang-xu，ZHANG He-ping，PAN Yan-rong 2006, 25(1): 107-109.  Abstract ( )   PDF (166KB) ( )   Although the traffic equilibrium assignment model has the precise structure and rational result．But the model can not be solved commendably because of the move variable and large dimension at present；thereby the application in real traffic planning is put down．In order to improve the veracity of the forecasting model，and settle the problem of solving ，this paper applies the Genetic Algorithm to the mode1．Finally specialize a simple example．and then solve the problem in virtue of the GA toolbox of Matlab，which arguing this means of solving traffic assignment is feasible． References | Related Articles | Metrics

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The treatment technology of the flawed sample in returning analytic approach of the traffic accident TANG Qiu-sheng,Li Ping 2006, 25(1): 110-113.  Abstract ( )   PDF (298KB) ( )   This text mainly discussed the treatment technology of flawed sample based on returning analytic approach，and also analyzed deeply the selection of the traffic accident predicting methods and the impact factors．And the impact that the combination of many kinds of factors on accident is discussed in predicting，which has produced better results and has some practical meaning． References | Related Articles | Metrics

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The model of regional distribution based on cost ZHA0 Xiu-li，HUANG Cheng-feng，XIA0 Sheng-xie 2006, 25(1): 114-116.  Abstract ( )   PDF (163KB) ( )   Whether the distribution is fitting or not have a deep influence to the operation，there is many analyses regarding the choice of distri． bution from planning to the end．We can get the best location from the view of operation．Meanwhile，there is a comparison of average cost． it is much comparable，and it has resulted the problem of other aspect such as the land cost and building cost． References | Related Articles | Metrics

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Analysis of the possibility of lower toll Chi Jie 2006, 25(1): 117-119.  Abstract ( )   PDF (176KB) ( )   Road asset is the important component of national economic asset in society．The society capital lead into the component of road asset，so it is not avoided the problems of tol1．In this paper，it is analysis of the problems of tol1．It is analysis of the characteristics of road：repel，uncompetitive，external characteristic．By the method of technical economics and dynamics，in theory it is rational and possibility the lower rates of the tol1． References | Related Articles | Metrics

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Equilibrium bidding strategy for first price sealed bid auctions and procurment in civil engineering LI Jian-zhang 2006, 25(1): 120-124.  Abstract ( )   PDF (242KB) ( )   This paper obtained the Bayesian Nash equilibium bidding strategy for first price sealed bid auctions and proeurments in civil engineering for some frequently used utility functions such as constant relative risk and constant absolute risk and logarithmic utility． References | Related Articles | Metrics

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Research on strength rigidity and shrinkage properties of cement stabilized granular materials of three different gradations LI Wen-guang，SONG Ren-WU，HE Zhao-yi 2006, 25(1): 125-127.  Abstract ( )   PDF (157KB) ( )   According to result of compaction test，uncomfined compressive strength test，cleavage strength test，compression modulus test and shrinkage test，evaluation was made on three different gradation types of cement stabilized granular materials． References | Related Articles | Metrics

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Some views of the supply chain management in the modern enterprise XIAO Hong，TANG Xing-li 2006, 25(1): 128-131.  Abstract ( )   PDF (190KB) ( )   This paper analyzes the integrating supply chain and the suply chain mode choice in the modem enterprise.Some problems during managing the supply chain are put forward． References | Related Articles | Metrics

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The analyzing with incomplete information game theory for the cost of constructive acceleration LiU Wei，WANG Yu 2006, 25(1): 132-133.  Abstract ( )   PDF (143KB) ( )   The course of signing”Constructive Acceleration Contract”is also the course of gaming among owner and contractor about the cost． The study of this paper is based on their game strategies and bring forward the game model in order to guide the negotiation and realize more excellent economic efficiency． References | Related Articles | Metrics

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The compare of information mechanism in efficient market and tractal market Qru Xiao-jian，MENG Wei-dong，WANG Yu 2006, 25(1): 134-137.  Abstract ( )   PDF (269KB) ( )   The security market trade is based on information captured and assimilated by investor．The essence of security market is information market．According to the different understanding of information's flowability mechanism and reflection mechanism,the security market is divided into efficient market and fractal market．This paper expatiates the different behavior of information mechanism in efficient market and fractal market，reviews the information mechanism of two hypothesis．Efficient market hypothesis is a special instance of fractal market hypothesis by qualitative analysis of Paretian distribution eigenfunction and Hurst exponent analysis． References | Related Articles | Metrics

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Matching research of automobile's engine and transmission WEN Xiao-xia，DU Zi-xue，LUAN Yan-long 2006, 25(1): 138-141.  Abstract ( )   PDF (202KB) ( )   in most degree，Excellent Automobile dynamical and economical performance often depends upon reasonable matching of it's engine and transmision．reasonable matching shall get the Excellent automobile dynamical and economical properties．in order to improve state of majority of autornobile's engines with the incorrect matching，in this paper，we regard transnfision's parameter as known quantity，to optimize parameter of the engine of which match with the transmission．The result indicates automobile dynamical and economical performance becomes good． References | Related Articles | Metrics

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The creative of the cylinder and the piston curved-line in wankel engine LI Hong-song，ZHANG Yong，QU Xiang 2006, 25(1): 142-144.  Abstract ( )   PDF (190KB) ( )   This paper discusses the creation of the cylinder and the piston curved-line in Wankel engine，and calculating method in design． References | Related Articles | Metrics

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Assessment of fatigue-life reliability of mechanical parts ZHENG Zhao-yun 2006, 25(1): 145-148.  Abstract ( )   PDF (215KB) ( )   The fatigue-life of a mechanical part is a very important index for its reliability．Leading an assesment of fatigue-life and reliability，which can be used further as an objective function in an optimal design of the part，is a meaningful thing．In this paper，an assessment of fafigue—life and reliability of a typical automobile part was conducted based on the theory of probability as a new application of pmbabilisfic and stochastic methods in mectmnical design． References | Related Articles | Metrics

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A qussi-2D numerical model for silt of the reservoir of shibanzhai in the beipan river GAO Pei，WANG Ping-yi，ZHANG Ji-sheng 2006, 25(1): 149-152.  Abstract ( )   PDF (205KB) ( )   Through the actual reconnaissance of the reservoir of Shibanzhai in the Beipan River，combine historical flow and the materials of fail sand rate，compare the difference of the design plan that have weir or not with A quasi-2D numerical sand mode1．Finally，provide the conclusion that the second design is more suitable to guarante the safely operation of hydropower station and reservoir． References | Related Articles | Metrics

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The water way regulation and effect analysis for Hushi shoal of the Chishui River FU Hua，ZHAO Zhi-zhou，ZHOU Hua-jun 2006, 25(1): 153-155.  Abstract ( )   PDF (163KB) ( )   In this paper the characteristic of Hushi shoal and the reason of navigation obstruction are ana1yzed．The regulation works on the shoal are also introduced in this paper．The effect of the shoal regulation is arlalyzed． References | Related Articles | Metrics

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The computer analysis on data from small scale ship model experiment CAI Chuang 2006, 25(1): 156-158.  Abstract ( )   PDF (242KB) ( )   Studying inland river navigationable condition by small scale ship-model is a advanced technology adopted to channel regulation． To ensure the test accuracy，the operation performance validity test has to take． The validity tests are often from dozens to hundreds,it leads to large workload during later period．The analysis accomplished by man previously，with low efficiency and bad accuracy，and easy lead to error. So the experiment data analysis taken over by computer is necessary.The ship model test accuracy and velocity would be improved．and the quality can be satisfied． References | Related Articles | Metrics

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Iterative methods for generalized variational inequalities in hilbert space LEI Ming 2006, 25(1): 159-161.  Abstract ( )   PDF (234KB) ( )   we use the auxiliary principle technique to suggest a of predictor-corrector algorithms for solving generalized variational inequalities． The convergence of the method only requires the partially relaxed strongly monotonicity and nonempty bounded closed subsets of the operator． As for applications，we obtain a number of known and new results for solving various classes of variational inequalities References | Related Articles | Metrics

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Morphological operation and structure element analysis about 2-numeric image DU Ting-na 2006, 25(1): 162-164.  Abstract ( )   PDF (142KB) ( )   The morphological operation of 2-numeric image are analyzed．The afect are explored that outcome of image processing is derived from structure dement among 2-numeric image．The idx-image are changed in matlab image processing tools box．The example of dilate and erode are supplied． References | Related Articles | Metrics

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Security problems and tactics of campus networks HUANG Zhi-hu，LAN Zhang-li 2006, 25(1): 165-168.  Abstract ( )   PDF (250KB) ( )   This paper analyzes the security problems in campus networks at present．Combining with the wide-using security technology of networks， it constructs and discusses an entire security scheme of campus network． References | Related Articles | Metrics