变截面门式刚架稳定及地震反应研究进展

Progress in Research on Stability and Seismic Response of the Steel Portal Frames with Tapered Members

摘要:

变截面轻钢门式刚架为我国单层大跨度工业和仓储建筑的主要结构形式。本文简要回顾了国内外变截面轻钢门式刚架稳定和地震反应研究的概况,介绍了其稳定分析及稳定设计方法的新进展以及地震反应理论分析、实验研究和分析方法的新进展,指出了目前在稳定和动反应研究及工程应用中存在的问题。针对我国相关现行规范在变截面门式刚架稳定和抗震设计方面规定的不足和存在的缺陷,提出了在稳定、地震反应及极限承载能力的判定方法等方面的研究建议。

Abstract:

The light steel portal frames with tapered members have been the main structure form of single- story long-span industry and warehouse building in China. In this paper, the development of research on stability and seismic response of portal frame with tapered members at home and abroad is reviewed briefly, the progress in the research on theoretical analysis, experimental investigation, and design method for the stability and seismic response of the frame is introduced. Meanwhile the problems in these two aspects and its practical application are pointed out also. In allusion to the insufficiencies of stability and seismic design items in some specifications for these structures in China, some suggestions for the stability, the seismic response, and the ultimate bearing capacity judging method of this type of structure are presented.