摘要
与传统的建筑钢结构不同,冷弯薄壁钢结构的动力稳定性与其荷载分布相关。以单/双列薄壁钢结构立体货架为例,通过有限元数值计算研究了不同荷载分布及其模态振型的变化规律;考虑梁柱节点的滞回特性,以施加加速度激励的方式分别在巷道和垂直巷道两个方向上对单双列货架进行了地震动反应谱分析。结果显示,荷载分布对货架垂直巷道方向的动力稳定性敏感;地震冲击造成钢结构底部层间位移角增大,从而导致结构性坍塌。拉杆增强设计有利于改善薄壁钢结构的动力稳定性,为基于抗震性能的空间拓扑优化提供了参考。
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 thinwalled steel structures promisingly.
作者
吕志军
侯瑞
宋一铭
杨光辉
李宏亮
LYU Zhijun HOU Rui SONG Yiming YANG Guanghui LI Hongliang(College of Mechanical Engineering, Donghua University , Shanghai 201620, China Shanghai Engineering Research Center of Storage and Logistic Equipment, Shanghai 201611, China Shanghai Jingxing logistics equipment Engineering Co. Ltd, Shanghai 201611, China)
出处
《计算机集成制造系统》
EI
CSCD
北大核心
2017年第9期1899-1906,共8页
Computer Integrated Manufacturing Systems
基金
上海市自然科学基金资助项目(15ZR1400600)
上海市科委标准建设资助项目(15DZ0500400)~~
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
seismic response spectrum
load distribution
maximum displacement
inter-storey drift angle
thinwalled steel
