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15 September 2002, Volume 21 Issue 3 Previous Issue    Next Issue

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The analysis of the free vibration characteristic of the long-span arch bridge made of concrete filled in steel tube LIU Dong 2002, 21(3): 1-3.  Abstract ( )   PDF (101KB) ( )   One part of this paper is about the calculation of free vibration characteristic which is possessed by a type of long-span arch bridge with parallel ribs and a type of long-span x-type arch bridge both made of concrete filled in steel tube .After consulting some related caculations from other papers , the universal law of free viberation characteristic which belongs to long-span arch bridge made of concrete filled in steel tube with parallel ribs is analyzed in this paper .The last part deals with the effect which intilted arched ribs have on the free viberation characteristic .This paper is aimed to offer referrence for further study References | Related Articles | Metrics

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Experimental study of the effects of damp on the continuousbeam bridge behavior induced by seism LI Jia-wu , LU Bin , LIU Jian-xin 2002, 21(3): 4-6.  Abstract ( )   PDF (110KB) ( )   The dampe is one of the bridge and structuresimportant dynamic-parameters .The study of the influence of damp on bridges helps the seismic resistance design .With the help of shake table tests , this paper presents the effects of damp on the beams and piersseismic behavior .Test results show that the dampe plays key roles in seismic resistance . Properly increasing the structurels dampe value can lowers the amplitude of beams or piers , disturbs the regular phase in vibration and therefore can gain considerable seismic resistance effects References | Related Articles | Metrics

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Study and practice on integral abutment bridge JIN Xiao-qin , SHAO Xu-dong 2002, 21(3): 7-10.  Abstract ( )   PDF (148KB) ( )   The expansion devices , which used to be adopted in traditional bridges , is one of the important factors influencing the comfort and the cost of the bridge .In middle (or small)bridges , it is possible that the newly-developed integral abutment bridge (or semi-integral abutment bridge)can solve the worldwide problem.Firstly , the research achievements on jointless bridge in the world are summed up briedefly in the paper .Secondly , the design , study and test of the jointless abutment bridges of China , Changsha Chennan Road are introduced pivotal.At last , some matters needing attention for the design and the practice for further research are provided References | Related Articles | Metrics

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The ratio of steel in concrete filled steel tube effect on the dynamic property of CFST arch bridge LI Yan-qiang , ZHANG Hong-mei , WU Lan-he 2002, 21(3): 11-13.  Abstract ( )   PDF (138KB) ( )   In this paper , the elastic module of concrete filled steel tubular (CFST)member has been calculated according to the uniform theory .The dynamic equations of CFST arch bridge are founded by using spacial finite element method , and the eigenvalues are solved by subspace iterative method .Analysis is made to research the influence of the ratio of steel in CFST to dynamic property of CSFT arch bridges References | Related Articles | Metrics

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A analysis of error area of bridge test ZHOU Jian-ting , SHENG Xiao-jun , LIU Si-meng , XUE Kai 2002, 21(3): 14-16.  Abstract ( )   PDF (102KB) ( )   On the basis of testing a lot of bridges , in order to get scientific and safe testing technology , the writer analyses the common faults of bridge testing .The result of analysis is useful in practice References | Related Articles | Metrics

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Repair and construction of the old bridge deck overlays HU Sheng-min , LUO Li-feng 2002, 21(3): 17-20.  Abstract ( )   PDF (132KB) ( )   The paper takes Timian Bridge Deck Overlay on the state route 106 in the Huadu District of Guangzhou in Guangdong province as an example and researches for many problems with removed , cleaned , and processed interfaces efc of repaired bridge deck overlay .These results are valuable to repair the bridge deck overlays in all kinds of roads References | Related Articles | Metrics

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Research on advanced genetic algorithm in structure optimization of asphalt pavement HU Xia-guang , TIAN li , WANG Bin-gang 2002, 21(3): 21-25.  Abstract ( )   PDF (164KB) ( )   On the basis of analysis of current asphalt pavement optimization method , comprehensively considering the cost of construction of pavement , maintenance , user and remnant , this paper caries out the object function of optimization of asphalt pavement .And mathematics model of asphalt pavement optimization is formed and worked out by advanced genetic algorithm and corresponding calculation is programmed .The calculation and analysis are made in practical project. The result shows that this method has a high converge speed and a high precision .Its an effective method in structure optimization of asphalt pavement so far References | Related Articles | Metrics

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Prediction of resilient modulus of asphalt pavement material by artificial neural networks MAO Cheng , QIU Yan-jun 2002, 21(3): 26-29.  Abstract ( )   PDF (138KB) ( )   Artificial neural networks are used on resilient modulus of asphalt pavement material prediction in this paper . An effective method of prediction is put forward , and the neural networks model for resilient modulus prediction is found . The predicting results indicate that the model proposed can gain high precision , which provide a new way for predicting resilient modulus and other mechanical behavior index of asphalt pavement material References | Related Articles | Metrics

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The identification and transformation of curve graph in mountain terrain highway horizontal alignment design QIU Xiao-jian , WU Guo-xiong , YAN Qiang 2002, 21(3): 30-33.  Abstract ( )   PDF (142KB) ( )   How can we change spline into orthodox horizontal alignment in highway horizontal alignment design ?The key is the curve graph transformation between the spline and the orthdox horizontal alignment .This paper elaborates the identification method of curve graph of spline curve graph changed into orthodox alignment curve and testifies this method by example .At last we use fminerch method to realize the transformation between them References | Related Articles | Metrics

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Strudies on concrete pavement typical structure for highway in Chongqing (Ⅰ) YANG Xi-wu 2002, 21(3): 34-37.  Abstract ( )   PDF (133KB) ( )   The process of designing concrete pavement typical sructure is introduced in the paper .To design concrete pavement typical structure for highway in Chongqing , seventy three of concrete pavement structures are investigated , and the causes of concrete pavement deterioration are analyzed in the paper .Twelve pavement strctures are analyzed by finite element to determine the mechanics mechanism of concrete pavement premature failure References | Related Articles | Metrics

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Strudies on concrete pavement typical structure for highway in Chongqing (Ⅱ) YANG Xi-wu 2002, 21(3): 38-42.  Abstract ( )   PDF (150KB) ( )   It is important that design parameters are determined to design rational pavement typical structure .To design rational concrete pavement typical structures for highway in Chongqing the design parameters are determined based on the natural conditions of Chingqing including weather 、soil 、geology concrete and the resource of building materials .The concrete pavement typical structures based on determined parameters are .An example is given in the paper to explain how to use pavement typical structures in concrete pavement desing References | Related Articles | Metrics

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Experimental research on temperature curling stress of cement concrete airport pavement HE Zhao-yi, ZHOU Hu xin 2002, 21(3): 43-46.  Abstract ( )   PDF (148KB) ( )   In this paper , the temperature field and temperature strain of cement concrete airport pavement are measured in situ .Then the distribution of Temperature field and temperature strain are suggested .Finally the measured temperature stress is compared with calculated temperature stress to verified theory calculated resalts References | Related Articles | Metrics

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Research on mechanism for highway tympanites to develop in chill region CHEN Hong-kai , ZHANG Xue-qing , TANG Hong-mei , LI Jian-jun , 　XUE Zhi-biao , WANG Xiao-lei 2002, 21(3): 47-51.  Abstract ( )   PDF (179KB) ( )   Based on investingations in-situ to highway tympanites along G218 and G313 , the authors found reasonably maeterial environment for highway tympanites to develop in this paper , i .e clay content is 40 % or so while water content is 25 % or so .Highway tympanites can be classified into two types :climate tympanites and dynamic tympanites . Tympanites pingo are shown for highway tympanites to occur .Tympanites pingo are circle in crankle road and tympaites pingo are ellipse in longitudinal road .In the section of roadbase , tympanites pingo often form below 30 or 40 centimeter of road surface .According to tympanites pingo crack , we can identify the type of tympanites and scale and depth of clay lens References | Related Articles | Metrics

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The appliance of upper bound limit analysis to highway slope stability WUMeng-jun 2002, 21(3): 52-55.  Abstract ( )   PDF (141KB) ( )   Through the introduction of main limit analysis theorem , this paper deduces the calculating equation of highway slope critical height in accordance with the two main stability failure .The comparison with method of limit equilibrium illustrates the correctness and effectiveness of the procedure References | Related Articles | Metrics

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Research on damage machanics of buried reinforced concrete box-culvert at shabin road chongqing city YE Si-qiao , CHEN Hong-kai , CAO Yan-hua 2002, 21(3): 56-58.  Abstract ( )   PDF (142KB) ( )   This paper is based on earlier study report and field survey , relying on the World Bank (WB)Item of Chongqing City “Sewage Exluding Conduit Concrete' s Breakage Mechanism and High Strenth , Anti-erosion Concrete Material Study” , using some theory concening damage mechanics to analyze the reasonsfor the concrete box-culvert' s cracking .To damage mechanics being applied in solving engineering practice problem , this topic is a adventurous attempt .And this paper makes out aintroductiory estimate of damage area .Furthermore , it analyzes the cracking reason objectively and rationally of the concrete box-culvert by damage mechanics in Chongqing City .It is a powerful demonstration to the earlier research conchusion References | Related Articles | Metrics

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The method to make out the scale of passenger and freight station yard of highway hub LIU Wei-hua , WANG Jian , YAN Qi-peng 2002, 21(3): 59-63.  Abstract ( )   PDF (165KB) ( )   It is very important to make out the scale of passenger and freight station yard in the layout of highway hub . It affects the investment and effect of the whole hub construction .In order to make up with the defect , the “five-factors method” is put forward Furthermore , an example is also used , which will increase the accuracy and reliability References | Related Articles | Metrics

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Logistics and competitive stratagem of enterprise (Ⅰ) JIANG Yang-sheng , WU Guo-xiong , CHEN Yan-ru 2002, 21(3): 64-67.  Abstract ( )   PDF (141KB) ( )   Cost advantage and value advantage are two basic kinds of competitive stratagem in enteprise operation .Logistics , like cycle system in body , will give huge effect on building competitive stratagem of enterprise .In this paper , the relationship between logistics and cost advantage is deeply analyzed .At last , the conclusion that logistics is one important part of competitive stratagem in enterprise is made References | Related Articles | Metrics

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The expert system for transacting and analyzing of automobile traffic accidents LI Wei , CHEN Zuo ming , SHAO Yi ming , GUO Yan xiang , WANG Xiao yu , SHEN Xiang 2002, 21(3): 68-71.  Abstract ( )   PDF (168KB) ( )   In this paper,the basic theory and the main functions of the export system for transacting and analyzing of automobile traffic accidents are discussed.The expert system is a large intelligence procedure,which is based on expert system theory and knowledge about automobile traffic accident.The program language in the system is a date base language.Its aim is to help us transact and analyze automobile traffic accidents so that the efficiency and the correctness of the work could be increased. References | Related Articles | Metrics

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Research on administration strategy of main highway over-load transportation in Chongqing HE Zhao-yi, XU Mao-zheng, TANG Bo-ming 2002, 21(3): 72-75.  Abstract ( )   PDF (126KB) ( )   Refering to the serious situations over-lovel transportations of main highway in Chongqing city , the present condition , nature and causes of over-load transportation are analysed .In veiw of the practice of over-load transportation administration in Chongqing , the administration strategies of over-load transportation are provided References | Related Articles | Metrics

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The enquiry of "coefficient of correction" in traffic volume forecast LI Zu-wei , HE Bigng 2002, 21(3): 76-78.  Abstract ( )   PDF (104KB) ( )   In point of the current status of the slow growth of western traffic volume , avoiding make the feasilility resarch work a sham , the thesis creates the western coeffcient of correction to amend the predicting model in feasibility report . The coefficient not only can get to MOC demand of “Highway Engineering Technical Standard” in highway planning & construction , but also shows support and determination of the Western Development which the central government gtants References | Related Articles | Metrics

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Improvement research on dynamic functioning of static GPS receiver FENG Xiao , LIU Xing , XU Guang 2002, 21(3): 79-82.  Abstract ( )   PDF (138KB) ( )   In this paper , the contents and steps of data treatment of a receiver in the GPS surveying are studied .Data functions of different fypes of receivers are analyzed .A scheme to improve traditional static GPS receiver into a new system with dyneamic position functions is put for arard A new point of view on function configuration of GPS surveying is suggested .expermental conposed system and its test run are introduced References | Related Articles | Metrics

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Researches on obtaiming methods of coordinate transform parameters from WGS-84 to engineering system FENG Xiao , ZHOU Ping , LIU Xing , XU Guang 2002, 21(3): 83-86.  Abstract ( )   PDF (139KB) ( )   More attentions are paid to the precision problems to obtain coordinate transform atior atior parameters from WGS-84 System to Engineering System.Necessities to research are put forward .Based on analyzing on the influencing factors on precision of transform atior parameters , some useful methods and points of view are put forward References | Related Articles | Metrics

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The modification technique of the principle of least squares for the tension of cables ZHANG Hang , GONG Liang-pu 2002, 21(3): 87-89.  Abstract ( )   PDF (106KB) ( )   In the course of tesing technology on-line , owing to the frequency error , especially due to the curve rigidity effect , the calculated tension of cables has some errors .This paper introduces the method for correcting the tension of cables by using the principles of Least squares , and it also analyses its accuracy .The results verify that the modificatory technology of the natural frequency is right ;the tension of cables accuacy is better and the cables are safe References | Related Articles | Metrics

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Estimation of the project control network element all of the precision XU Xi , ZHEN Fan-xiang 2002, 21(3): 90-93.  Abstract ( )   PDF (141KB) ( )   While establishing the project control network , It usually encounters coordinated point and established fundamental point some or all of the same , class , this paper uses fundamentals of generalized smoothen .It can effectively solve the problem of start data smoothen , and pledye the precision of the project control network References | Related Articles | Metrics

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The experiments of the circulation flow and subgrade scour in bend channel TIAN Wei-ping , LI Hui-ping , GAO Dong-guang 2002, 21(3): 94-97.  Abstract ( )   PDF (131KB) ( )   The theory analysis and experiments about the flow structure , circulation flow development features and sediment movement laws in the bend channel are made , and the formula for the maximum scour depth of the subgrade river side is established .This paper can provide scientific basis for depth of foundation of the slope and the retaining wall References | Related Articles | Metrics

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Study on the influence of diwei bridge in Chongqing to the traveling flood of the yangtze river YANG Bin , YANG Sheng-fa 2002, 21(3): 98-102.  Abstract ( )   PDF (184KB) ( )   The Diwei bridge is situated in Damaoxia river reach of Chongqing , and borders on the Diwei cement Co ., Ltd .In order to study that the bridge makes influence on the ability to traveling flood of the Yangtze river , in this paper , 2-D flow mathematical model is used , the calculation achievements tally with actual situationmore better .In addition , the dispose of water-retaining structure at mathematical model calculation is researched theoretically References | Related Articles | Metrics

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Research on structure optimal loading construction in immigration sites in sanxia reservoir TANG Hong-mei 2002, 21(3): 103-106.  Abstract ( )   PDF (161KB) ( )   On the basis of investigations to immigration sites in Yunyang , Wanzhou , Fengjie and Fulin regions in Chongqing resevoir , author take Shuangjiang immigration site , locating in Yunyang county , as an example and approach deformation and strength feature of the site under kinds of structure in this paper .Using horizontal displacement , Lode stress and strain energy from FEM simulation to the site , the author fund optimal object function and conclude optimal loading constuction of engineering structures in the site .The results are valuable to guide immigration site construction in Chongqing reservoir References | Related Articles | Metrics

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The expert system for transacting and analyzing of automobile traffic accidents LI Wei , CHEN Zuo-ming , SHAO Yi-ming , GUO Yan-xiang , WANG Xiao-yu , SHEN Xiang 2002, 21(3): 107-111.  Abstract ( )   PDF (163KB) ( )   In this paper , the basic theory and the main functions of the export system for transacting and analyzing of automobile traffic accidents are discussed .The expert system is a large intelligence procedure , which is based on expert system theory and knowledge about automobile traffic accident .The program language in the system is a date base language .Its aim is to help us transact and analyze automobile traffic accidents so that the efficiency and the correctness of the work could be increased .The main functions which realizes include :(1)accident evidence register ;(2)accident transacting; (3)accident inquiry ; (4)statistics and analysis .Scanner can be used to transact pictures .Electric screen can be used to aid accident circumstance analysis meeting .Its main specialies include : (1) complete menu man-computer interface , convenient operation ;(2)the data is organized in three level in order to change and expand easily; (3) supplying the function of explaining and the process of operation easy to understand ; (4)storing the knowledge by frame theory in order to spare the saving room;(5)when transacting automobile traffic accidents , use the knowledge in the formation of associative-triple in order to improve the efficiency and quality of knowledge application References | Related Articles | Metrics

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The practical techniques of identifying road grade YANG Zhi-gang , CAO Chang-xin , SU Yu-gang 2002, 21(3): 112-115.  Abstract ( )   PDF (136KB) ( )   In this paper , according to the mathematics model identifying dynamically grade angle by means of multi-sensor information fusion , the authors introduce two methods of practical techniques realizing the signal fusion algorithm , in the digital information fusion and the analogue signal fusion , so as to identify road grade angle References | Related Articles | Metrics

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Analyzing the design of stabilizer bar on compliance suspension of citro?n-zx car MU Xiang-dong,TANG Xin-pen 2002, 21(3): 116-118.  Abstract ( )   PDF (108KB) ( )   In this paper , the stabilizer bar of Citro?n-ZX car compliance suspension structures of design has been analyzed .The effects of stabilizer bar structures to Citro?n-ZX car handing stability has been discussed References | Related Articles | Metrics

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Current condition and countermeasure of automobile maintenance and repair trade management LIU Jian-xun , HOU Xiao-mei 2002, 21(3): 119-122.  Abstract ( )   PDF (130KB) ( )   This paper analyzes the current widespread and pressing issue of the automobile maintenance and repair trade' s managenment of this country , and the way to the solution is pointed out References | Related Articles | Metrics

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Influence of groundwater on human environment XU Guang-xiang , ZHANG Yong-xing , HA Qiu-ling 2002, 21(3): 123-126.  Abstract ( )   Groundwater is related to human environment such as rock and soil slope , cave , reservoir , dam, oil and ores mining , environment estimation , groundwater development , plant growing and so on .By analyzing examples , this paper analyzes groundwater has great influence on human environment from many aspects such as hydrologic cycle , ground sinking , slope stability , dam safety , gallery driving and induced earthquake and so on References | Related Articles | Metrics