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15 April 2004, Volume 23 Issue 2 Previous Issue    Next Issue

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Research of efficient width of flange in wide flanged girder with variable cross section and long over-hanging flange LI Li-feng , SHAO Xu-dong , CHENG Xiang-yun , BAO Wei-gang , YUAN Lun-yi 2004, 23(2): 1-5.  Abstract ( )   PDF (178KB) ( )   Normal stress of 20 PC bridges, with wide flanged box girder, is analyzed with the methods of spatial plate/shell FEM, plane frame FEM and DIN 1075. According to the stress results, the paper makes an analysis of shear lag efficient of three main sections in girders. Available method of equivalent simple supported span length of different sections is advised according to DIN 1075. The basal research will make the new bridge specification being more scientific and reasonable References | Related Articles | Metrics

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Compressive stiffness of composite concrete-filled steel tube LI Chuan-xi ,XIA Gui-yun , ZHANG Jian-ren 2004, 23(2): 6-9.  Abstract ( )   PDF (181KB) ( )   Composite concrete-filled steel tube is divided into three parts of core concrete, inner steel tube and outer steel tube. Core concrete is analyzed by using elastic axisymmetric pillar and steel tube by using thin shell. Based on the compatibility of radial displacement and longitudinal strain, the compressive stiffness of CCFST is derived. The influence of inner steel tubular Poisson’s ratio?outer steel tubular Poisson’s ratio and concrete Poisson’s ratio on compressive stiffness and stress rat References | Related Articles | Metrics

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Introduction to the Japan CFST design method for axial compression members LIU Xiao-yu 2004, 23(2): 10-12.  Abstract ( )   PDF (111KB) ( )   The Japan CFST design methods for axial compressiom members is introduced. Based on a project design ,the example calculation of CFST column is given .It can be referred to CFST column design in China References | Related Articles | Metrics

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Shuimowan bridge construction quality control LUO Na , LUO Tao , FENG Han-dong 2004, 23(2): 13-15.  Abstract ( )   PDF (133KB) ( )   Taking the bridge as an example,the papers introduces continuous frame bridges’construction quality,control measures,mainpoints and experience,and provides some control reference References | Related Articles | Metrics

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Fluid dynamic analysis and a calculating model of longitudinal pressure-suction ventilation of highway tunnels WANG Xiao-wen 2004, 23(2): 16-20.  Abstract ( )   PDF (164KB) ( )   Based on the hypothesis of ideal fluial and the fluid dynamic analysis, the paper derives the energy equation and momentum equation of air flow in tunnels,analyzes the ventilating resistance and pressure calculating model, establishes the basic theory of longitudinal pressure-suction ventilation of highway tunnels, proposes the key control point and pressure balance model. The theory and application of extra long highway tunnels ventilation are explored References | Related Articles | Metrics

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A bi-linear model of non-uniform plane beam element WANG Jia-lin , , ZHU Zeng-hui , XIAO Sheng-xie 2004, 23(2): 21-25.  Abstract ( )   PDF (175KB) ( )   By applying the virtual work principle, the stiffness and mass matrices of an arbitrary non-uniform plane beam element are derived in the paper. For the simplicity and convenience in application, a bi-linear non-uniform plane beam model is recommended. Its stiffness matrix, mass matrix and influence lines by kinematic method can be formulized explicitly. A numeric example demonstrates its accuracy in comparison with the analytic results and indicates that its results coincide with those of the d References | Related Articles | Metrics

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Discussion about solution to the key problems of application of modern nonmetallic structures in bridge engineering SHI Ying , WANG Jin , LI Da-hua 2004, 23(2): 26-30.  Abstract ( )   PDF (236KB) ( )   The evident advantages and application prospect of the modern nonmetallic structures and the traditional new structure style are discussed base on the characteristics analysis of the nationality and high-tech in bridge engineering,and the crucial requirements on the structures are met in aspects of high strength,longspan,corrosianrce,sistance seismic,stability fatigue,intelligent control and so on,but the rest problems are deformation consistency of FRP composite with concrete and FRP tendon pre References | Related Articles | Metrics

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Construction methods of twin-arch tunnels TANG Liang 2004, 23(2): 31-35.  Abstract ( )   PDF (220KB) ( )   Based on the construction process of the building of twin-arch tunnels of Tongyou Mountain Tunnel, Yinzi Mountain Tunnel 1 and Yinzi Mountain Tunnel 2 in South Second Ring Road in city of Liouzhou in Guangxi Province,practiced techniques in twin-arch tunnels are thoroughly analyzed and summarized. Meanwhile, several suggestions about the adoption of different construction methods for this special tunnel type are made References | Related Articles | Metrics

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Collaboration framework of highway design with simulation YANG Hong-zhi , XU Jin-liang 2004, 23(2): 36-39.  Abstract ( )   PDF (143KB) ( )   highway design process combines multiple disciplines and creativity of designers. Computer simulation can evaluate the design at different level by constructing different simulation models. By analyzing the characteristics of highway design, the paper discusses the application tips of highway simulation and requirements of highway design. Further more, the collaboration framework of highway design with simulation is constructed to lay a base for combination of highway design and simulation References | Related Articles | Metrics

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Put forward some suggestion to improvement bituminous pavement design in our country YU Qing-he 2004, 23(2): 40-41.  Abstract ( )   PDF (107KB) ( )   Combine with the development tendency of bituminous pavement structure design and the design method, put forward some suggestion to improve the bituminous pavement design theory ,design standard and material parameter in bituminous pavement structure design rule in force References | Related Articles | Metrics

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Functional mechanism of the polymer cement materials MENG Jing-yu , WANG Hua-he , LIANG Nai-xing , YAO Hong-yun 2004, 23(2): 43-46.  Abstract ( )   PDF (364KB) ( )   The paper mainly discusses how the properties of the polymer cement materials are improved from the aspects of microcosmic structure and microcosmic pore analysis and probes into the fumctional mechanism References | Related Articles | Metrics

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Application studies of SMA ZHANG Li-hua 2004, 23(2): 47-50.  Abstract ( )   PDF (128KB) ( )   SMA is a new type asphalt aggregate mixture. Focusing on its structure features, the paper makes further analysis and studies on the application of SMA in the light of Chinese domestic conditions References | Related Articles | Metrics

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A study on modified asphalt mortar with diatomite LIU Li , LI Jian , HAO Pei-wen , MEI Qing-bin 2004, 23(2): 51-54.  Abstract ( )   PDF (190KB) ( )   The performance and rheological properties of modified asphalt mortar with diatomite are studied by way of conventional tests and the Strategic Highway Research Program (SARP)tests such as the Dynamic Shear Rheometer (DSR) test and the Bending Beam Rheometer (BBR) test.The contrast is made between conventional tests and SHRP tests. It is shown that the diatomite improves the high temperature properties and anti-aging properties of asphalt mortar greatly,and conventional tests can’t evaluate the References | Related Articles | Metrics

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Control of asphalt pavement quality based on grey system theory WU Xiao-guang , LU Wen-quan , ZEN Min-chun , XU Zu-en 2004, 23(2): 55-58.  Abstract ( )   PDF (134KB) ( )   First, the quality characteristics of asphalt pavement and the limitation of mathematical statistics method of quality control are analyzed in the paper. A control method of asphalt pavement quality based on grey system theory is put forward, and the GM(1,1) model built.Through introduction of the conception of metabolism predicting model, the GM(1,1) model is updated properly References | Related Articles | Metrics

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Research and development of computer management system for geographic information of road materials LUO Ying , SHA Ai-min , SUN Zhao-yun 2004, 23(2): 59-62.  Abstract ( )   PDF (141KB) ( )   During highway construction, in order to meet the requirements for road material information, it is necessary to study and develop a computer management system for the geographic information of road materials. The paper elucidates the developing environment, overall design and the technical measures of that system References | Related Articles | Metrics

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Mechanism analyzing and solve measure of vehicle bump at bridge head PENG Bo , ZHANG Yi-luo 2004, 23(2): 63-65.  Abstract ( )   PDF (102KB) ( )   Based on the mechanism analysis of vehicle bump at bridge head, the harm caused by bumps and its developing course are analyzed in theory;Quantitative and qualitative analysis of the cause for bumps and handling of bumps to improve vehicle steering at bridge head are presented in the paper. References | Related Articles | Metrics

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Proportion designing of fly-ash concrete WANG Rui-yan 2004, 23(2): 66-68.  Abstract ( )   PDF (102KB) ( )   By numerically analyzing the volcanic effects of fly ash, the author points out the method of determining the most reasonable content and exceeding quantity coefficient of fly ash. By that way, we can solve the problem of coordination of the materials used in concrete, and it is practicable in proportion designing of fly ash concrete References | Related Articles | Metrics

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Research of GM in the adjustment of general layout of yards and stations of highway main terminals LI De-gang , HUO Ya-min , GAO Hong-li 2004, 23(2): 69-72.  Abstract ( )   PDF (142KB) ( )   The general layout of the yards and stations of highway main terminals should be adjusted to the change of the city scale and layout which undergoes a great change with the development of society and economy, which, bad or good,is very important to highway transportation synthetic benefits. In order to gain the best layout and synthetic benefits of transportation, the game theory is applied to the selecting model in the adjustment of layout of yards and stations of highway main terminals on the References | Related Articles | Metrics

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The AML-real-time forecast method applied to parameters of traffic stream on expressway ZHU Shun-ying , WANG Hong , LI Guan-shou , HAN Zhi 2004, 23(2): 73-74.  Abstract ( )   PDF (120KB) ( )   The type and the adaline-mada line(AML)real-time forecast method applied to parameters of normal traffic sream on expressway is discussed in detail, then it is applied to real-time forecast of traffic volume, time occupancy and sport speed References | Related Articles | Metrics

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A mathematical model for the optimal location of toll stations on the highway ZHANG Lun-ke , HUANG Yuan-gao , ZHOU Jing 2004, 23(2): 75-78.  Abstract ( )   PDF (135KB) ( )   A mathematical programming model is proposed in this paper to solve the problem that the intervals between existing toll stations are too small on some highways. In the model,the profit charged from tolls is maximized under the restrictions that separations between toll stations are limited within a given value.Considering the characteristics of the toll station location problem,this complicated nonlinear integer programming problem with conditional constraints is thus converted to a simple line References | Related Articles | Metrics

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To evaluate and forecast real-timely city highway service level based on intelligent public traffic SHA Yu-feng , LIAO Xiu-zhai , LI Zhi-hong , WANG Liang-liang 2004, 23(2): 79-84.  Abstract ( )   PDF (207KB) ( )   The paper studies the real-timely processing and logging mode of the parameters needed in evaluation and forecast of the urban road service level.Based on the running urban buses as the dynamic data units,the real-time running-state data of city buses are acquired,the bus before-head time spans are computed and the traffic flow velocity analyzed;the velocity forceast by wave-filtering adjustment is compared with the actually measured velocity;a four-grade service level real-time evaluation and References | Related Articles | Metrics

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Social economic environmental influence evaluation of highway projects LIU Jian-feng 2004, 23(2): 85-89.  Abstract ( )   PDF (188KB) ( )   The social economic environmental influence evaluation of highway projects is an important part of the social economic evaluation of highway projects. The paper introduces the concept and purpose of the social economic environmental influence evaluation of highway projects. After that the paper expatiats on the content, process and means of the social economic environmental influence evaluation. The paper is of constructive significance to the perfection and development of the social economic References | Related Articles | Metrics

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Discussion of several problems in DTM based on TIN LAI Hong-bin , LI Yong-shu 2004, 23(2): 90-93.  Abstract ( )   PDF (142KB) ( )   A method of estabisihing digital terrain models(DTM) with TIN is introduced, and problems during modeling are discussed in the paper.Furthermore,application problems about the hybrid model,as well as the data structure of TIN,are analyzed.In the end,the method of applying DTM based on TIN in engineering is illustrated References | Related Articles | Metrics

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Road traffic crime for lack of restitution ability OU Ju-shang 2004, 23(2): 94-97.  Abstract ( )   PDF (125KB) ( )   It is civil responsibility to be liable for damage in road traffic accidents.It is unreasonable that penalty take place of the civil restitution in road traffic cases.Those who had no liability for damage in road traffic accidents should not be criminated. In accordance with criminal laws,the duty man who damages property up to a certain amount in road traffic accidents should be criminally punished References | Related Articles | Metrics

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Discussion about causes for geological disasters and treating countermeasures on reservoir banks WANG Duo-yin , ZHOU Shi-liang , LIU Ming-wei , XIAO Sheng-xie 2004, 23(2): 98-101.  Abstract ( )   PDF (133KB) ( )   In the paper, the causes for the geological disasters on the reservoir banks are analyzed,and the treating countermeasures and design principles are discussed in combination with the construction of harbors,roads or other works. The coordinating principle of the engineering construction with the control of the geological disasters References | Related Articles | Metrics

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Study of properties and treatment of stabilized expansive soil on the highway in Longquanyi in Chengdu YAN Guo-quan , XU Ren-an , HE Zhao-yi 2004, 23(2): 102-106.  Abstract ( )   PDF (181KB) ( )   The paper analyses and studies the plasticity index,compaction,maximum dry density and optimum moisture content of the expansive soil in Longquanyi in Chengdu as well as the swelling pressure-moisture content, swelling pressure-dry density and effective cohesion-moisture content relationships,and discusses the effects of four stabilizing materiats: lime cement,lime,SBT as well as STX no the improvement of the optimum moisture content,unconfined compression strength,expansion rate and so on References | Related Articles | Metrics

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Analysis of the importance of expediting professional training in the development of Chinese supervision industry CAO Cui-xing 2004, 23(2): 107-110.  Abstract ( )   PDF (166KB) ( )   Through analysis of the basic principles of WTO and the situation of Chinese supervision industry,problems confronting supervision industry and the higher requirements for professionals under the new condition after China joins WTO are discussed in this paper.A view point is put forward that it is an urgent issue to expedite professional training for supervision industry in order to make it really fulfill staff’s team-working spirit and rapidly respond to market competition References | Related Articles | Metrics

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Study on the carrying capacity of gasoline engine oil additive based on the uniform design MA Lin-cai 2004, 23(2): 111-113.  Abstract ( )   PDF (109KB) ( )   In the paper the experiments are arranged according to the uniform design, and the data are analyzed by using the regression equation. The results show that MoDDP, oxidation-corruption inhibitor package can enhance the carrying capacity of gasoline engine oil remarkably. The interaction between the dispersant package and oxidation-corruption inhibitor package does no good to the carrying capacity. The detergent and base oil have little influence on the carrying capacity. The direct optimum metho References | Related Articles | Metrics

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Probing and discussion about the calculating model of the spatial structurs of gantry cranes ZHANG Li-ping , WEI Dao-sheng , LIAN Chong-xian 2004, 23(2): 114-117.  Abstract ( )   PDF (136KB) ( )   A spatial calculation model of spatial structures is more precise than a simplified plane one. The spatial model can be used to clearly analyse the forces in various components, Its results conform well to the date tested from a real gantry crane designed with it.It can also be used to design other types of cranes References | Related Articles | Metrics

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Genesis and characteristic analysis of flood in Xinjiang province DONG Yu-wen , HU Jiang , YANG Sheng-fa 2004, 23(2): 118-122.  Abstract ( )   PDF (160KB) ( )   In collection and collation of the flood material of Xinjiang province, the genesis and characteristics of flood in Xinjiang are analyzed.Types of flood in Xinjiang province can be classified as storm flood seasonal flood caused by accumulation of snow, mixed rain and snow flood and flood from melted snow and ice, which can be divided into glacier lake outburst flood and flood from glacial thaw. At the same time,genesis and characteristics of these types of flood are analyzed. It can be applied References | Related Articles | Metrics

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Model test of regulation works for the navigation channel of Changtan reach in Mingjiang river LI Ping , YUAN Ping , CHEN Gui-fu 2004, 23(2): 123-127.  Abstract ( )   PDF (188KB) ( )   According to the characteristics of the shoal and rapids lying in Changtan reach in Mingjiang river and obstructing the navigation channel, a model test was conducted to study the regulation schemes and took good effects. In the paper, the model design, verification and testing process of the Changtan reach engineering are introduced in brief. The project has been already accomplished. By several hydrographic years, verification, the navigation conditions have been greatly improved, and the regu References | Related Articles | Metrics

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Discussion about design of yacht hydrofoils TANG Yi-hu 2004, 23(2): 128-130.  Abstract ( )   PDF (144KB) ( )   The paper explores the design of yacht hydrofoils,expounds the way of designing bow hydrofoils and stern hydrofoils, and estimates the resistance of bow hydrofoils and stern hydrofoils and the holistic resistance of yachts References | Related Articles | Metrics

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The constrained assignmemt problem in inequality of workers and jobs CHI Jie 2004, 23(2): 131-133.  Abstract ( )   PDF (1340KB) ( )   In the paper, the optimal problem of constrained assignmemt in inequality of workers and jobs are studied. It is solved that when workers have to take on too heavy jobs,there will be a detrimental effect on the efficiency and quality. The optimal method in min-cost flow is presented,which is convenient and feasible References | Related Articles | Metrics