摘要
与普通钢结构建筑明显不同,薄壁钢结构立体货架的动力稳定性与其荷载分布密切相关。以单/双列货架为典型案例,研究了货载分布及结构模态振型的变化规律;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。数据显示,地震冲击过程中货架底部区域的层间位移角相对较大,垂直巷道方向的动力稳定性对荷载分布更加敏感。以此为基础,提出了货架结构稳定性增强设计方案,为基于性能的薄壁钢结构空间拓扑优化提供参考。
Contrary to conventional steel structures,the dynamic stability of thin-walled steel structure is closely related to its load distribution.Take single/double row racking as an example,the load distribution and vibration mode change of the racking are studied.The method of applying acceleration excitation is used to analyze the response spectrum in x-axis direction and cross direction.It is shown that the drift angle of the bottom story of rack is larger under frequent earthquake,and the load distribution is more sensitive to the dynamic stability of single column in cross direction.There is a relation between the inter-story drift and the story shear force and the loads.Based on these results,the design for enhancing the dynamic stability of the racking is proposed,and this provides a reference for spatial topology optimization of thin-walled steel structures.
作者
侯瑞
吕志军
李宏亮
杨光辉
HOURui;LYUZhijun;LI Hongliang;YANG Guanghui(College of Mechanical Engineering,Donghua University,Shanghai 201620,China;Shanghai Jingxing Logistics Equipment Engineering Co.,Ltd.,Shanghai 201611,China)
出处
《建筑钢结构进展》
CSCD
北大核心
2018年第4期67-74,共8页
Progress in Steel Building Structures
基金
上海市自然科学基金(15ZR1400600)
上海市科委标准建设项目(15DZ0500400)
关键词
动力稳定性
荷载分布
最大位移
层间位移角
钢结构货架
dynamic stability
load distribution
maximum displacement
inter-story drift
steel structure rack
