Experimental Study on Static Loading of Long-span Cable-stayed Bridge of a Semi-floating Composite Girder
This paper focuses on assessing the reliability issues of a semi-floating composite girder cable-stayed bridge with double towers and a double cable-plane system during its operational stage,a combination of numerical simulation and load test is used to evaluate whether the bearing capacity of the bridge meets the design requirements based on the most adverse line loading of the highway class I load,with the Modaomen Xijiang super bridge as the case study.The deflection,strain,tower deformation,horizontal displacement,and cable forces of the semi-floating composite girder cable-stayed bridge are analyzed.The results show that the strain,deflection,displacement and cable force of Modaomen Xijiang super bridge at each control interface are basically linear changes.The structural deformation and response are consistent.The structural calibration coefficients are all less than 1.0,and the structure has a high bearing surplus.The actual bearing capacity and stiffness of the structure meet the design requirements on the whole,with safety and reliability.
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