摘要
以沿海某一实际轻钢厂房为例,按ASCE 7-10取用风荷载体型系数,对厂房整体刚架进行了非线性的极限承载力分析,获得了抗风安全系数及极限状态下的破坏模式,并与CECS中规定的正向风荷载的结果作了比较。结果显示,这类轻钢结构在斜向风作用下的承载力及抗风安全系数低于正向风作用的情况,承载力降低的主要原因是局部屈曲呈现多区域化发展,且早于正向风作用时发生。
Nonlinear ultimate limit load-capacity analysis was performed to the frame of an actual light-weight industrial building located at the coastal area of China using the finite element method. The oblique wind load was determined utilizing the most unfavorable shape factors proposed by the ASCE 7- 10. The corresponding wind-resistant safety factor and its failure mode were thus found and also compared with the results of the same frame under normal wind loads specified by Chinese technical specification for light-weight steel buildings. The obtained results indicated that the load capacity and wind resistant safety factor of these kind of structures under oblique wind were lower than those under the normal wind. The main reason for decrement of load capacity under oblique wind was that local buckling develops at multiple areas within the frame and furthermore occurs earlier than that under the normal wind.
出处
《低温建筑技术》
2017年第2期27-30,共4页
Low Temperature Architecture Technology
基金
国家自然科学基金资助项目(50978230)
关键词
轻钢结构
门式刚架
斜向风
抗风安全性
light-weight steel structure
portal frame
oblique wind
wind-resistant safety
