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《Journal of Huazhong University of Science and Technology(Urban Science Edition)》 2008-04
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Analysis and Testing of Cable-stayed Bridge Structures with Single Oblique Tower and Steel-concrete Composite Beam

SHI Zhou,PU Qian-hui,GAO Yu-feng(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)  
In order to know the actual bearing capacity and research the performance of the bridge structure under static and dynamic load,the structural analysis and static and dynamic loading test were performed on the steel-concrete composite beam and single oblique tower cable-stayed bridge with the spans of 112m and 48m.The specific finite element analysis program was used to establish the calculation model and the load effects and its distribution under design load were analyzed.According to the characteristics of bridge structure,the static load tests were conducted on the most unfavorable moment section in main span of the steel box girder,the other concrete span and the tower.The stress and displacement of the girder and tower,and the tension of cables were measured during the loading test.The tests results show that the actual loaded state coincides well with the calculation model,the tested stresses of steel box girder and concrete girder and tower are relative lower than the calculation values;the tested displacements are smaller than calculation values.It is demonstrated that the bridge is of enough strength and stiffness.The free-vibration characteristics of the bridge were tested with microseism method,and the tests were done under passing vehicle with and without obstacle.The dynamic tests show fairly well dynamic performance of the bridge.
【CateGory Index】: U448.27
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