| Based on the 3-D finite element method, the technique of bridge measurement and the analysis of bridge mode, the structure simulation, the mechanical characteristics and the load test method of Yichang Kaziwan Bridge, which is a prestressed concrete oblique-pulling through truss bridge, is studied in detail.The 3-D finite element model of the bridge is built with the finite element software. By the comparison between the 3-D finite element model and the planar finite element model which is used in this bridge construction control, the reliability of the 3-D finite element model is proved. The static characteristics of the oblique-pulling truss bridge are detailedly analyzed. Several major effect parameters that influence the deflection of the bridge load test computation analysis and the data processing such as the node rigid region effect, the effect of shear resistance between bridge desk floorbeam, the concrete shrinkage and creep effect and the temperature effect, are studied. And the influence rule and the sensitive degree of all the parameters are obtained. The dynamic performance of the oblique-pulling truss bridge is analyzed. From the results of the dynamic analysis, the dynamic characteristic influence rule of several major effect parameters is obtained, such as the effect of shear resistance between bridge desk floorbeam, the cross beam, the rigidity of piers. Finally the system research to the load test of oblique-pulling truss bridge is carried out.
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