Calculation model and application of buckling-restrained steel plate wall combined with friction damper
For the large yield displacement of the buckling-restrained steel plate wall(BRW),only stiffness and bearing capacity can be provided in the small deformation stage.BRW can not dissipate energy in the small deformation stage.To solve this problem,the wall type friction damper(FD)and buckling-restrained steel plate wall are arranged in parallel in the thickness direction to form a new type of buckling-restrained steel plate wall combined with friction damper(FD-BRW).In the small deformation stage,the friction damper in the composite member slides to dissipate energy.As the deformation increases,the buckling-restrained steel plate wall yields,and the friction damper and the buckling-restrained steel plate wall dissipate energy together.Based on the test results of BRW,FD and FD-BRW,a simplified calculation model was established to simulate the mechanical properties of FD-BRW.The simplified calculation model consists of three springs.The calculation results of the simplified model were basically consistent with the experimental results,which can replace the solid finite element analysis and can be directly applied in the overall analysis of the structure.Based on the simplified model,taking the optimal additional damping as the control index,the reasonable ratio of the sliding friction force of friction damper to the yield bearing capacity of the buckling-restrained steel plate wall(slip-yield ratio)and the recommended value of the height-width ratio of the member were discussed through parametric analysis.The results showed that the height-width ratio is recommended to be less than 1.5,and the reasonable range of slip-yield ratio is 0.07～0.10.
万方数据
维普
