关键词: 地震动反应谱, 荷载分布, 最大位移, 层间位移角, 薄壁钢结构

Abstract: The dynamic stability of cold-formed thin-walled steel structure was related to its load distribution,which was obviously different from the traditional steel building structure.By taking the single/double entry racking as examples,the load distribution and mode shape on the racking were researched with finite element method.In consideration of hysteretic model on beam end connectors,the acceleration excitation was applied to analyze the seismic response spectrum in down-aisle direction and cross-aisle direction respectively.The result showed that the load distribution was more sensitive to the dynamic stability of steel racking in cross-aisle direction;the drift angle of  rack bottom layer was larger under the earthquake sway,which could led to structure collapse.The bracing reinforcement solution was proposed to improve the dynamic stability of thin-walled steel and optimize the spatial topology of thin-walled steel structures promisingly.

Key words: seismic response spectrum, load distribution, maximum displacement, inter-storey drift angle, thin-walled steel