Research on Optimal Design of Shock-Absorbing Building Steel Frame
To make full use of the energy dissipation capacities of viscous dampers in a steel frame to reduce the response accelera-tion of seismic vibration of the building steel frame,a novel optimal design method of shock-absorbing building steel frame is pro-posed.The method is executed in two stages.In the first stage,the beams and columns of the steel frame are optimized without con-sidering the constraints of relative displacement between floors.In the second stage,viscous dampers are installed in the steel frame obtained in the first stage to control the response accelerations of the steel frame to the seismic loads.In addition,in the second stage,the damping coefficients of the viscous dampers are optimized under the constraints of relative displacement between floors.The effectiveness of the proposed method is verified by solving the optimization design problem of a 7-story,1-span shock-absorb-ing building steel frame.The results show that The proposed method can control the ratio of maximum relative displacement be-tween floors to floor height within 0.25％.Additionally,compared with the existing methods,the acceleration of seismic vibration of the steel frame optimized by the proposed method is significantly reduced.
万方数据
维普
