Seismic Performance of Large-span Channel Steel Composite Continuous Beam
In order to ensure the stability and reliability of the structure under earthquake action,the long-span channel steel compos-ite continuous beam bridge has weak seismic performance compared with the ordinary continuous beam bridge because of its light weight.A 3D model of the steel composite continuous beam bridge was established,and the mechanical properties of the long-span trough steel composite continuous beam bridge under earthquake were analyzed by using the control variable method.The stiffness,fric-tion coefficient at the bottom of the support and damping ratio of the steel composite beam bridge were studied.The results show that increasing the yield stiffness and friction coefficient of the bearing can reduce the deformation of the bearing,but increase the bending moment value of the bottom pier of the main beam,and increase the structural damping ratio can also improve the seismic performance of the steel-concrete composite continuous beam bridge.
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