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20 July 2008, Volume 27 Issue S1 Previous Issue    Next Issue

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Analysis on Measured Deformation and Theoretic Deformation of Large Span CFST Arch Bridge Caused by Temperature ZHENG Zhi-Ming, ZHOU Jian-ting, LIANG Xiong, LIU Qing-Yang, XU Bin, DAI Yang, HU Zhi-quan 2008, 27(S1): 843-848,1008.  Abstract ( )   PDF (568KB) ( )   The method of observing the deformation of Heyang Jialing River concrete-filled steel tube arch bridge is introduced.The differences between theoretical and measured deformation of the bridge and the causes of differences are analyzed.Furthermore,it is pointed that the deformation of long-span concrete-filled steel tube arch bridge operating many years has complex space state;and the state of deformation often can't be accurately forecasted. Related Articles | Metrics

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Analysis on Temperature Crack of PC Continuous Box Girder Bridges LIU Yong, MA Wen-yan, LIANG Tian-tian 2008, 27(S1): 849-851.  Abstract ( )   PDF (248KB) ( )   The PC continuous box girder bridge is popular,because of its big span,good force performance of box section,convenience and shortcut construction.However,this kind of bridges will generate cracks in different degrees in bridge construction or in service.The causes of generating cracks are analyzed in terms of temperature differences.At the same time,an example is taken to discuss the influence different temperature grads modes make on the calculation of temperature stress. Related Articles | Metrics

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Study on Influences of Post-Tensioning Prestress Holes on Mechanical Characteristics of Bridge Cross-Section XING ZHi-ming, DENG Xue-tao, ZENG De-rong 2008, 27(S1): 854-858.  Abstract ( )   PDF (436KB) ( )   In terms of behavioral mechanics of PC bridge,the numerical analysis method is used to analyze the stress distribution rules and mechanical characteristics of box girder section of PC bridge under different horizontal forces.The influences of post-tensioning prestress holes on mechanical characteristics of bridge cross-section are also studied,which offers theoretic basis to study the cracking problems of box girder of this kind of bridge. Related Articles | Metrics

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Space Simulation Analysis on Influence of Post-Tensioning Prestress Holes on the Mechanical Characteristics of Cross-Section of Bridge ZHENG Bang-you 2008, 27(S1): 859-862,1008.  Abstract ( )   PDF (380KB) ( )   Taking Chongqing Yudong Yangtze Bridge as an example,according to the state of three-dimensional space,the installments loaded cantilever construction of prestressed long-span bridges is studied by numerical analysis method.Be-cause of the existence of pore reserved for pre-stressed,the mechanical properties of cross-section have been influenced.The comparison is carried out between it and the calculation results of plane structures.The result shows that it has obvious differences at various stages,meanwhile,it is pointed out the potential dangers these in fluences may bring to the bridges. Related Articles | Metrics

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Simplified Analysis on Buffeting Response of Continuous Rigid Bridge at the Longest Cantilever Construction Stage SUN Yan-guo, WANG Qi 2008, 27(S1): 863-866.  Abstract ( )   PDF (287KB) ( )   The continuous rigid frame bridge with high pier and large span is very flexible at the longest cantilever construction stage,and turbulence wind often brings the great buffeting responses,which is going to affect the structure itself and the safety of construction.According to the requirements of practical engineering,the buffeting response spectrum analysis method is simplified,and the applied formula also considering the effect of background response is presented.The reliability of applied formula is verified by the full-scale aero-elastic model in wind tunnel testing. Related Articles | Metrics

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Test and Study of Attrition Loss of Pre-stressed Wire of Curved Box Girder LIANG Tian-tian, XIANG Zhong-fu, BIAN Ming-zhi, CHEN Ming 2008, 27(S1): 871-874.  Abstract ( )   PDF (267KB) ( )   Aiming at the problem of choosing reasonable value of attribution parameters of pre-stressed curved bridge,the method of attrition loss test of pre-stressed wire is introduced,with the combination of the test of attrition loss of pre-stressed wire of curved bridge and finite element model analysis.The relation between curvature radius and attrition loss is analyzed,and the advice to choose the value of attrition factors is proposed,which serves as a reference to calculate attrition loss of the same type of bridges. Related Articles | Metrics

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Test and Analysis of Welding Residual Stress for Tensile Anchor Plate of Guanyinyan Bridge LIU Xiao-yu, WANG Yan-bo 2008, 27(S1): 875-879.  Abstract ( )   PDF (373KB) ( )   In order to research the distribution of welding residual stress of anchorage area of tensile anchor plates,three full-scale representative models of joint in the tensile anchor plate and cable-beam of Guanyinyan Bridge are made.The results of the test show that there are different degrees of welding residual stress in main welding lines and some are close to yield strength.Through furthermore research and analysis,the characteristics,distribution rules,causes and influential factors of welding residual stress of anchorage area,as well as corresponding opinions and suggestions are put forward.The study also provides us a lot of reliable referential data for decreasing and avoiding welding residual stress in designing and manufacturing similar structural bridges. Related Articles | Metrics

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Test and Analysis of Mechanical Performance after Eliminating Welding Stress of Tensile Anchor Plate ZHANG Jiang-ping, WANG Lin 2008, 27(S1): 880-883,897.  Abstract ( )   PDF (345KB) ( )   Based on Guanyinyan Bridge of Jiangjin in Chongqing,the anchorage between the cable and the main beam adopts the tensile anchor plate,and most of tensile anchor plates are thick steel ones.The welding stress of welding seam among the anchor plates is eliminated and various tests are carried out after eliminating welding stress.Mathematical statistics theory and statistical analysis software SPSS are applied to judge whether the results of welding seams tests follow the normal laws;furthermore,probability credible district is adopted to judge whether the welding seams meet the relative requirements of mechanical performance.Through the study,it can deepen the understanding of physical mechanical properties of the welding connections between thick plates and ensure the safety and reliability of the welding connections of cable-stayed bridge girder and tensile anchor plate. Related Articles | Metrics

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Load Test and Reinforcement Design of Shizhu-Huanglong Bridge LIU Yi, MA Yu-hui, LUO Yu-hu 2008, 27(S1): 884-887.  Abstract ( )   PDF (296KB) ( )   To increase the bearing capacity of Shizhu-Huanglong Bridge and enable it to meet the requirements of road-II load,the current technical state and bearing capacity of this bridge are evaluated through the full inspection,load test and finite element analysis.On this basis,the comprehensive technology is used in reinforcement design,such as reinforced concrete confining and high pressure grouting.After more than two years running,the good strengthening effect of this bridge has been proved. Related Articles | Metrics

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Study on Temperature Control of Mass Concrete about Cushion Cap on Large Span PC Continuous Rigid Frame Bridge LIU Shan-hong, GAO Li, WANG Yi, LIU Yuan 2008, 27(S1): 888-891.  Abstract ( )   PDF (287KB) ( )   Casting mass concrete of pile caps in long-span continuous rigid frame bridge is one of the key processes during bridge construction.The measures of crack control in mass concrete of cap influence the quality of the bridge and service period directly.Taking the 4# pier cap,right in Shuitu Jialing River Bridge as an example,the temperature control,construction technology and other issues are studied.Some effective engineering methods with the value of application are obtained. Related Articles | Metrics

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Damage Analysis of Circular-Section Concrete Pile under Pressure and Bending Load SI Wen-jing, WANG Cheng 2008, 27(S1): 892-894.  Abstract ( )   PDF (167KB) ( )   Lemaitre damage principle is used to analyze the damage of circular cross-section concrete pile under pressure and bending load in civil engineering and to deduce dimensionless axial force and bending moment expressions.Moment rules under corresponding failure strains are calculated and the relationships between neutral axis' dimensionless displacements and different failure strains are also calculated.The results can be used as references when calculating circular-section concrete pile's bending bearing capacity in actual projects. Related Articles | Metrics

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The Unsupported Construction of GRC Permanent Form in Cantilever Casting Beams LIU Zhen-dong, LIU Shan-hong, LI Fang 2008, 27(S1): 895-897.  Abstract ( )   PDF (219KB) ( )   From the investigation of the construction of GRC permanent form in cantilever casting beams and the discussion of unsupported construction of arch bridge,the assumption of constructing GRC permanent form in cantilever casting beams with unsupported technology is proposed.Through the improvement of the installation of form and the unsupported construction,the expected effect is achieved.Thus the direction of constructing form with new material is point out. Related Articles | Metrics

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Research on Disease Analysis and Reinforcement Technology of Truss Arch Bridge of Reinforced Concrete SUN Xiao-yan, MO Xi-jing 2008, 27(S1): 898-901.  Abstract ( )   PDF (316KB) ( )   Based on investigation and analysis of the diseases of reinforced concrete truss arch bridge,the synthetic reinforce method of increasing cross-section,pasting steel plate and pasting carbon fiber sheet (CFS) is proposed.It can be a reference to the engineering technicians engaged in old bridge reinforcement. Related Articles | Metrics

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On the Types of Bridge Diseases and Its Countermeasures LIU Shan-hong, LIU Yi 2008, 27(S1): 902-905.  Abstract ( )   PDF (339KB) ( )   Almost all kinds of the bridge diseases and their influences are discussed.The causes of these diseases are analyzed one by one,such as rusting,freezing-thawing,supports,expansion joint,bridge deck pavement and cracks.Furthermore,the causes are summarized in detail and the corresponding countermeasures of the main causes are proposed.It offers certain guidance to the construction technology,the monitoring and maintenance of the bridge at the operating time,which is helpful to improve the level of bridge construction. Related Articles | Metrics

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Brief Study on the Application of Short Line Method to Construction of Urban Bridge DENG Hua, LI Rui 2008, 27(S1): 906-909.  Abstract ( )   PDF (283KB) ( )   The characteristics of the short line method,construction process and application occasions are introduced and the comparison is made between short line method and long line method.The conclusion is drawn that the short line method is more convenient for construction,and it can take full use of specialized supervisory control software and data,which indicates that it is necessary to apply the short line method to the urban bridge construction. Related Articles | Metrics

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Discussion on Tunnel Lining and Exchanging Humps Technology of Highway ZHANG Xing-lai, ZHONG Yun-jian 2008, 27(S1): 910-912,916.  Abstract ( )   PDF (332KB) ( )   Exchanging humps is a quite thorough treatment of the serious diseases,which endanger safety,intrude the building gauge and hinder the service function of the tunnel.Its construction is quite difficult and technical procedures are quite complicated.The methods and the process of early branch and the lining of the arch are introduced.It can be reference for similar tunnels to exchange humps. Related Articles | Metrics

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Site Monitoring and Analysis of Construction of Super Long Tunnels in Karsts Areas LIU Xiao-lian, ZHU Qing-hang, WANG Zhen, SHANG Wen-tao 2008, 27(S1): 913-916.  Abstract ( )   PDF (287KB) ( )   Based on the site monitoring results of Zhenyang tunnel in the Qianjiang to Pengshui segment of the Yu-Xiang highway,the common rules of deformation of surrounding rock in super long tunnel of karsts areas are deeply discussed,and the internal development state of surrounding rocks is revealed.It is emphasized that the site monitoring of the stability is absolutely necessary for the construction.By the analysis of measuring convergence around,vault sink measurement,surface subsidence monitoring of the project equal measure from the displacement-time curve,the characteristics of curves of displacement with time in "natural type","jumping type",and "breaking type" are obtained.The monitoring data prove that the surrounding rock is steady,which can provide a reliable technological reference for the transfixion of the section. Related Articles | Metrics

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Thought on a Few Details of Humane Design of Highways and Urban Roads ZHANG Xing-lai, ZHONG Yun-jian 2008, 27(S1): 917-919.  Abstract ( )   PDF (260KB) ( )   Highway and urban road,not only as a bearer of the traffic channel,they should also serve for the people.In terms of improving their service functions and details,the concepts of dynamics,coordination,security and fault-tolerance are proposed to enhance the humane components of the highway and city road,which can meet people's travel needs better. Related Articles | Metrics

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Review on Rubblizing Improvement Techniques of Old Cement Concrete Pavements DONG Yuan-shuai, ZHU Hong-zhou 2008, 27(S1): 920-923.  Abstract ( )   PDF (365KB) ( )   The rubblizing technology of cement concrete pavement is a kind of breaking old cement concrete pavement measures;it is suitable for the cement concrete pavement,which has the problem of serious structural damage or the loss of bearing capacity at the large area.And one of its goals is to eliminate the inescapable reflection cracks in the overlay of asphalt concrete pavement,so it has a prosperous application future in China.The principles,features,equipments and construction process of rubblizing technology as well as the requirements of the promotion are introduced,which offers a reference to take its full use of good social and economic benefits. Related Articles | Metrics

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Pilot Study of the Configuration of Shrinkage-Compensating Concrete WANG Yu, ZHOU Shui-xing, BAI Xing-rong 2008, 27(S1): 924-927.  Abstract ( )   PDF (328KB) ( )   The shrinkage-compensating concrete is adopted in Chongqing Jiangjin Guanyinyan Yangtze River Bridge wet cast-in-place bridge expansion joints.Aiming at different types and mixing amount of expanders,the orthogonal tests on strength and restrictions on expansion are carried out.Consequently,the type of expanders,the mixing amount and the mix ratio of expansive concrete suitable for this bridge are selected out. Related Articles | Metrics

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Research on Performance of Foamed Bitumen Semi-flexible Base of Cold Recycling LAN Cheng-xiong, WANG Ze-min, SHENG Xing-yue, WEN Hai, GUO Yin-tao 2008, 27(S1): 928-932.  Abstract ( )   PDF (366KB) ( )   Using old asphalt pavement milling mixture,foamed bitumen and cement are combined to make recycling stabilizer,to generate the semi-flexible base by site cold recycling.From the selection of materials,components of the grading,the foaming condition of bitumen and the proportion of oil to stone,the physical properties of foamability and the strength characteristics of foam bitumen semi-flexible base of cold recycling are studied.The best foaming condition of bitumen,the best moisture and the optimal proportion of oil to stone of foamed bitumen mixture are obtained by the experiment.The results indicate that the strength of foamed bitumen mixture can meet the requirements of road base design parameters in China. Related Articles | Metrics

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Influence of Clay Dosage on the Adhesion of Asphalt and Coarse Aggregate ZHAO Chun-hua, ZHU Xiao-long 2008, 27(S1): 933-936.  Abstract ( )   PDF (343KB) ( )   The objective of this study is to investigate the influence of clay coatings left on aggregate on adhesion of the asphalt and coarse aggregate by the boiling test,using three different coarse aggregates and two soil with different plasticity index.The test results indicate that clay dosage and plasticity index of the coarse aggregate influence the adhesion of the asphalt and coarse aggregate significantly.At the same time,the adhering grade is affected by the boiling time.Also,it is worth to continue to study the longtime validity of the asphalt anti-stripping agent. Related Articles | Metrics

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Calculation of Center of Gravity of Geotechnical Centrifuge Model Test Based on VB GUO Guo-he, ZHU Qing-hang, WANG Tao, ZUO Yang 2008, 27(S1): 937-940.  Abstract ( )   PDF (282KB) ( )   Geotechnical centrifuge model test can reproduce the deformation process in self-gravity stress field,intuitively reveal the mechanism of deformation and damages,and can provide other analytical methods with true and reliable parameters,thus it has been more and more widely used.However,after filling the test model according to the scale similarity,the calculation of the center of gravity of geotechnical centrifuge test model is simple but is also a time-consuming process.Associated with relative physical and mechanical knowledge,the formula of the center of gravity of the experimental model is deduced and then simplified.Furthermore,the basic idea of using VB programming language to simplify the calculation process is proposed,which can provide forceful support for rapid and accurate completion of the experiment. Related Articles | Metrics

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Development of Highway Construction Detection System Based on PDA SONG Xiao-ming, FENG Xiao, TANG Dai-hua 2008, 27(S1): 941-944,963.  Abstract ( )   PDF (369KB) ( )   In view of the current stage of highway construction detection status,the ideas of developing the design of personal digital assistant(PDA) system set up under the module installed and its main functions are introduced.Combination with PDA powerful computing and data processing and its portable feature,it will be the essential infrastructure of construction detection staff in the future. Related Articles | Metrics

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Non-destructive Technique of Quality Detection on Soil-Rock Mixture Embankment Constructed by Dynamic Consolidation Method JIA Xue-ming, YANG Jian-guo 2008, 27(S1): 945-947.  Abstract ( )   PDF (234KB) ( )   To evaluate the effect of dynamic consolidation method used in the construction of soil-rock mixture embankment,no non-destructive detection technique has been used until now.The effect of dynamic consolidation method is evaluated by measuring face-wave velocity.The principles and characteristics of this approach are expounded firstly.Then it is employed in evaluating the degree of compaction in the Liang-Chang Expressway embankment engineering.The result indicates that the change of face-wave velocity before and after dynamic consolidation reflects the change of soli-rock features and the effect of dynamic consolidation can be evaluated by measuring face-wave velocity.Rayleigh-wave used to evaluate the effect of dynamic consolidation is worth to be promoted actively because of its efficiency and accuracy. Related Articles | Metrics

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Simulation Analysis on Response of High Retaining Wall Structure under Blasting Earthquake Wave LU Bo, DAI Ting-li, PENG Mei 2008, 27(S1): 948-951.  Abstract ( )   PDF (329KB) ( )   Through the collection,research and analysis of large amount of blasting earthquake data,a corresponding model of blasting earthquake simulation signal is set up.The blasting earthquake simulation signals are applied to analyze the dynamic response of high retaining wall structure under blasting earthquake wave.Using the technology of instantaneous kinetics analysis,the dynamic response and control limit vibration velocity of structure are got,which provides necessary technical parameters for blasting earthquake monitoring of high retaining wall structure. Related Articles | Metrics

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Reinforcement Methods and Causes of Diseases in Rigid Retaining Wall of Highway in Mountainous Area YANG Jian-guo, JIA Xue-ming, WANG Jun-jie 2008, 27(S1): 952-955,1008.  Abstract ( )   PDF (406KB) ( )   The types and causes of diseases in rigid retaining walls of highways in mountainous area are introduced,and then some reinforcement methods aiming at different diseases are proposed.Taking Yu-Chang Highway as an engineering example,the causes and reinforcement methods of cracks in a high rigid retaining wall on the highway from Chongqing to Changshou are analyzed.Some problems,which should be paid large attention to in treating diseases of the rigid retaining structures of the highway in mountainous areas are discussed. Related Articles | Metrics

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Analysis on Safety Monitoring and Stability of High Soil Slope SHANG Wen-tao, GUO Guo-he, WANG Zhen 2008, 27(S1): 956-959.  Abstract ( )   PDF (269KB) ( )   Aiming at the project reality of Stilwell environment slope,slope deformation and stress monitoring are carried out to control the high slope deformation effectively and direct the construction accurately.The characteristics of slope deformation and the effects of anchor bar are analyzed,using a lot of slope monitoring-data combined with the factors of deformation,geology and excavation.The monitoring data indicate that the slope anchor effect is fine and the slope distortion is controlled effectively.It is shown that informatization construction can ensure the stability of slope and direct construction correctly. Related Articles | Metrics

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Analysis on Factors Affecting Stability of SoilRoadbed along River HUANG Yu-he 2008, 27(S1): 960-963.  Abstract ( )   PDF (351KB) ( )   The stability of roadbed along river smay be more vulnerable than that of other roadbeds, for it is easy to be influenced by hydrologic and weather change and becomes instable. It is very useful to investigate the factors affecting its stability.So it is very rewarding to strengthen the roadbed stability in practical engineering to find out themain factors and their ways affecting the stability of soil roadbed along the river.Based on the ideas of geology and mechanics,the influence of ground water on the stability of soil roadbed along rivers is analyzed.The cause and mechanical mechanism of surface water destroying the soil roadbed along rivers are explored. Related Articles | Metrics

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Analysis on BEM Stability of K22 Landslide on Kun-Shi Expressway XIA Bao-xiang, JIA Xue-ming, XIAO Wen 2008, 27(S1): 964-966.  Abstract ( )   PDF (256KB) ( )   The Songmao slope is at the K22+900~K23+180 of the highway from Kunming to Shilin (Kun-Shi Expressway).In order to ensure the safety of the road,slide resistant piles are established to protect the slope.2D EM analysis is introduced to inspect the rationality of the treatment.The result shows that the slope is unstable without treatment,and the simulation result is very similar with the observed phenomena.The slope becomes stable and safe after treatment of slide resistant piles.It indicates that the method to treat the slope is reasonable and efficient. Related Articles | Metrics

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Discussion on Waterproof Construction Technology of MTR Stations WANG Xi-wang 2008, 27(S1): 967-971.  Abstract ( )   PDF (350KB) ( )   The project of Chengdu Metro Stadium Station has high standards of waterproof engineering,because of its deep base,rich groundwater and big technical difficulties.According to the practice of the construction project,the waterproof principles,standards and requirements,waterproof concrete as well as the waterproof construction of specific location of the subway station are explored. Related Articles | Metrics

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Application of Bentonite Waterproof Carpet to the Subway Station LI Yi 2008, 27(S1): 972-975.  Abstract ( )   PDF (369KB) ( )   In order to solve the waterproof problem in the construction of the underground project with deep base,taking a subway project as an example,the construction technology of bentonite waterproof engineering is discussed preliminarily.And then the key technology and specific methods of construction are proposed,with the hope to have a certain referential value to future similar projects. Related Articles | Metrics

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Research on Administrative System of Rural Roads and Urban Highways in Chongqing City WANG Xiao-kai, HUANG Wei-hong, HU Xing-hua 2008, 27(S1): 976-979,1004.  Abstract ( )   PDF (432KB) ( )   In the charge of different administrative institutes,rural roads and urban highways,which serve as the carrier of providing transportation services,overlap one another because of different functions and regions they situated.With the scale of Chongqing urban districts broadening day by day,many suburban roads gradually serve as urban highways.The unsolved problems,such as the attached debts during building-up and maintenance personnel,result in rurbania district's anarchy in administration and maintenance.These contradictions get aggravated and bring severe troubles to citizen's trip.The judgment and analysis of the administrative system of the two are focused,and the existing problems and sticking points are found out.A further analysis on the specific property and economic characteristics of rural roads and urban highways is also carried out.Moreover,a detailed scheme on the reform of rural roads and urban highways administrative system according to the objective situation in Chongqing city is proposed. Related Articles | Metrics

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Research on the Application of Charge by Weight Policy to Road Management GUO Guo-he, LIU Zeng-hua, WANG Long 2008, 27(S1): 980-983,989.  Abstract ( )   PDF (437KB) ( )   In recent years,overload transportation is one of the serious problems which has troubled the development of communication in China,and caused a series of problems in the fields of traffic,circulation,automobile manufacturing and so on.Worse,it has disrupted the healthy development of the national economy,so the comprehensive management is needed.The harm of overload transportation and its causes are expounded,and the theoretical basis of charge by weight is offered.Then the pros and cons of charge by weight policy in road management are discussed emphatically,and the conclusion is drawn that charge by weight is the most effective way of treating overload,but yet to be further improved.Finally,several recommendations are proposed to promote the current state of overload. Related Articles | Metrics

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Study on Treatment Technique for Tu'naozi Shoal in Three Gorges Reservoir Area YANG Xiang-fei 2008, 27(S1): 984-989.  Abstract ( )   PDF (481KB) ( )   According to the natural condition,Tu'naozi shoal don't have obvious influence on the boat's sailing,for it only silts in the floodwater;when the water is low,the shoal is washed out.However,when Three Gorges Project runs the scheme of 139 m water level,the problem of the accumulative deposition becomes more and more severe,for the sediment situates the end of the reservoir and the sediment deposited at high-water period can't be washed out completely.Firstly,the dangerous condition of the shoal and the process of the treatment during last three years are introduced.Secondly,through the analysis of shoal evolvement rules in the cases of natural condition and the sluice of Three Gorges Project as well as the shoal's mechanism of baffling sailing,the techniques about engineering maintenance measurement,construction and the choice of construction time are explored.The conclusion offers some reference to the treatment of the similar shoals at the end of the reservoir and the shoals at the 175 m water level. Related Articles | Metrics

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Study on System Analysis and Synthetic Handling Capacity of Logistics System in Port TANG Jian-qiao, WANG Ci-guang, LI Xin-min 2008, 27(S1): 990-993.  Abstract ( )   PDF (243KB) ( )   Firstly,the ideas,principles and methods of systematic science and network optimization are applied to analyze the framework and function of port logistics;then,the handling capacity of main operational links and subsystems are simply introduced;finally,the harmony theory and calculating method of the synthetic handling capacity of port logistics are studied.Furthermore,the validity and operability of this theory are tested by a numerical example.The chief measures to improve the synthetic handling capacity of logistics in port hinge have been put forward. Related Articles | Metrics

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Simulation and Optimization of Vehicle Ride Comfort DU Zi-xue, DONG Ying-juan 2008, 27(S1): 994-996.  Abstract ( )   PDF (225KB) ( )   To improve the vehicle ride comfort performance,amulti-body dynamic model is established by means of MSC.Adams.Simulations of the model under random input are carried out successfully.The effects of vehicle parameters,such as the stiffness and damper of the suspension on the vehicle ride comfort are taken into consideration.The optimization design of vehicle ride comfort is executed by D-optimization analysis.It is significant to improve the vehicle ride comfort performance. Related Articles | Metrics

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Character Segmentation Method of Vehicle License Plate Automatic Recognition System YANG Lei, DENG Tian-min, ZHANG Hui-ling 2008, 27(S1): 997-998,1008.  Abstract ( )   PDF (206KB) ( )   It is necessary to implement the character segmentation technology after the vehicle license plate is positioned,so that the automatic recognition of the system can be realized.A kind of character segmentation algorithm based on projection and limitation is introduced,which describes the image normalization of the vehicle plate,thresholding and detailed process of character segmentation in detail.This method is simple and feasible,and it is proved by the tests that it can satisfy the real time demands of automatic recognition system. Related Articles | Metrics

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On Composition of Global Satellite Navigation System and Its Comparison ZHOU Zu-yuan 2008, 27(S1): 999-1004.  Abstract ( )   PDF (544KB) ( )   Based on the brief introduction of the components,advantages and disadvantages of global satellite positioning system,GLONASS satellite positioning system,Galileo satellite positioning system and Beidou satellite positioning system,the comparison of various systems in technical aspect is made. Related Articles | Metrics

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Analysis on Restrictive Factors and Strategy of Green Building Development XU Jia, SHEN Qi-ming 2008, 27(S1): 1005-1008.  Abstract ( )   PDF (326KB) ( )   Based on deep analysis of restrictive factors of the promotion and application of green building in China,developing green building in a steady pace is proposed.This proposition is proposed from the aspects of easy-getting resources,recycling resources,updating concepts,strengthening green awareness and etc.,and consistent with the principles of policy,economic,technical,applicability and environmental protection. Related Articles | Metrics