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15 June 2007, Volume 26 Issue 3 Previous Issue    Next Issue

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Analysis of Core-concrete Constitutive Relationship of Big Diameter Concrete-filled Steel Tube under Axial Compression WANG Zhi-hui，XIANG Yang-kai，GU An-bang，LAN Xiang-yu 2007, 26(3): 1-4.  Abstract ( )   PDF (241KB) ( )   A constitutive relationship of core-concrete which suits to the big diameter concrete-filled steel tube was set forth through some widely applicable models as well as the methods of experiments and numerical analysis.The effects of diameter to model are given through axial compression experiments of diferent diameters samples. References | Related Articles | Metrics

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Analysis of Seismic Response of Long-span Arch Bridge ZHANG Xin ，ZHOU Zhi xiang ，SONG Lei 2007, 26(3): 5-9.  Abstract ( )   PDF (292KB) ( )   Taking Tibetan Nimu bridge as an object，and using the finite element soft，a mode and dynamic analysis was siren．By simulating the seismic responses，the characteristic of the bridge Was acquired and the TMD system was applyed to control the seismic responses of the bridge．The main vibration mode Was confirmed by the method of mod al mass ratio．The optimal param eters of TMD，when attained，were simulated into the finite element moda1．At last，the conclusion that fixing TMD in arch bridge is an efective passive vibration control method to reduce the seismic response of the structure，which is verified by the time-marching analysis result． References | Related Articles | Metrics

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Dynamic Characteristic Analysis of Single-column Pylon of Single-Cable-plane Cable-stayed Bridge WANG Xin-zhong ，ZHOU Shui-xing，LIU Qi 2007, 26(3): 10-12.  Abstract ( )   PDF (157KB) ( )   The natural frequency and vibration mode are the principal modal parameters for representing structure dynamic behavior and the impeaant basis for evaluating bridge dynamic performance．A three-dimensional finite element model for single pylon cable-stayed bridge with ANSYS procedure Was created to analyze the dynamic performan ce of Shizhou Cable-Stayed Bridge in Enshi City．The result enunciates that the torsion modal appears early，and the lord across eonseeution with extension makes the lord across horizontal benting of the first modal，which could serve as reference for the analysis of dynamic behavior of similar bridges． References | Related Articles | Metrics

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Static Analysis of Unidirectional Slope Cable-stayed Bridge during System Transformation WANG Wei-sheng，ZHOU Shui-xing，WANG Xin-zhong，LIU Su-ling 2007, 26(3): 13-16.  Abstract ( )   PDF (188KB) ( )   When the system of a unidirectional slope cable-stayed bridge transfers from the fixed state into the floating one， there ale the balancdess impulsive forces at every fixed spot because of the unidirectional s1ope．By the finite element analysis model of the main bridge in ANSYS，the effects which the force had taken on the internal forces and the displacements of the structure were analyzed．On the basis of these，the transformation sequence project is put forward to reduce adverse effects． References | Related Articles | Metrics

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Influences of the Geometric Nonlinear on the Stablity of Long-span Cable-stayed Bridges XIAO Guang-hong ，ZHANG Qiu-1ing ，HUANG Ming-hai 2007, 26(3): 17-19.  Abstract ( )   PDF (232KB) ( )   Based on the Chongqing Fengjie Yangtze River Bridge with span of 460m，the influences of Geometry linear and nonlinear on the stability of long-span cable-stayed bridge was analysed in the construction stage and the service stage．The stability of the bridge was evaluated with calculating results from software ANSYS. References | Related Articles | Metrics

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Causes and Precaution for Concrete Cracks in Skewback Foundation of the Wentanghe Bridge HU Ji-long ，WANG Chun-mei 2007, 26(3): 20-23.  Abstract ( )   PDF (200KB) ( )   The skewback foundation of super large span arch bridge belongs to voluminous concrete structures，and a great deal of hydrated heat is generated during constructing，and a biggish diference in temperature between inside and outside of the concrete constructure is formed.Consequently，the diference intemperatures may lead to cracks due to thermal stress with diferent depths．Taking the construction techniques of skewback foundation of Wentanghe Bridge，a super large span arch bridge of Yulin Expressway in Chongqing，for example，the therm al stress and presented preventive measures and construction methods for the thermal cracks of mass concrete were analyzed and figured out. References | Related Articles | Metrics

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Torsion-control Analysis of Box-girder Bridge of Anisomerous Variable Section at the Stage of the Balanced Cantilever Construction DENG Xue-tao，ZENG De-rong，LIU Hong-wei 2007, 26(3): 24-28.  Abstract ( )   PDF (304KB) ( )   Based on the dimensional theory method，the theory of shearing force flows and Prandtl'S soapfilm analogy method，formulas for calculating torsional an gle and shearing force of box beam 6f anisomerous variable section at the stage of the balanced eantilever construction were inferred．By means of the formulas ，the torsion，distortion and internal force of the box beam of Chongqing Yudong Changjiang Bridge at the stage of balanced cantilever were calculated and analysed．The calctdationval result validates that the torque which is produced because the dead load and the constructing load distribute anisomerously has few torsion an d distortion on the box beam，and that internal force on the box beam is in the controllable area． References | Related Articles | Metrics

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Structure Analysis and Construction Cntrols during Hoisting and Installation of Structural Member of Heyang Bridge LIU Xiao-yu， TANG Wan-min 2007, 26(3): 29-32.  Abstract ( )   PDF (208KB) ( )   Through the structure analysis in the stage of building in arch member and monitoring，combined with parameters in the process of hoisting and installation of structural member and component in Heyang Jialingjiang CFST bridge，a conclusion is siven that the construction-control technology plays an important role in security，lineshape of bridge in process of hoisting and installation of structural member and component. References | Related Articles | Metrics

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The Select and Design of the Traveler of Wujiang Second Bridge in Fuling LI Xiao-liang，XIANG Guang-hong，ZHANG Qiu-ling 2007, 26(3): 33-35.  Abstract ( )   PDF (174KB) ( )   Presents the main girder structure of Fuling Wujiang Second Bridge，which is prestressed concrete cable。stayed bridge with twin pylons and single cable plane．Based on the comparison with the Yamen Bridge in Guangdong，the traveler construction scheme of the Wujiang Second Bridge was designed，and the design of the traveler was introduced in detail. References | Related Articles | Metrics

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Study on the Construction Control Project for Chongqing Yudong Bridge ZENG De-rong，LIU Hong-wei，DENG Xue-tao 2007, 26(3): 36-40.  Abstract ( )   PDF (294KB) ( )   Yudong Bridge is an important engineering in Chongqing，which owns the charaters of big spans，nonsymmetry of section and high piers．A scheme of construction control project for the bridge is introduced. References | Related Articles | Metrics

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Analysis of Arch Bridge Dynamic Properties by Resonant Vibration ZHOU Bing，SHI Shang-wei 2007, 26(3): 41-43.  Abstract ( )   PDF (214KB) ( )   Based on the resonant tests with running and braking trucks on the main span of Chongqing Tongliang County Zhu-bao Arch Bridge，the dynamic parameters including deflections and stresses were acquired，and the structural free vibration frequencies and damping coefficients were analyzed through the time-domain method and Fast Fourier Transforms(FFT)，and the bridge carrying capacity was evaluated according to its dynamic responses and modal parameters.Those provide the structural analysis with reasonable supports. References | Related Articles | Metrics

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Application of Embedded Database to Real-time Monitoring System of Bridges ZHUANG Zhi ，GUO Sheng 2007, 26(3): 44-47.  Abstract ( )   PDF (239KB) ( )   Features of embedded database and system structure of Berkeley DB are introduced.Combined with the requirement of the real-time monitoring system of bridge，a monitoring system structure of bridge Was designed based on embedded database- Berkeley DB ，and the key realization code of data processing in Berkeley DB Was given.Finally the expansibility and developing problem of the structure system are discussed simply. <