高层建筑围护结构地震破坏导致次生灾害的初步研究  

A PRIMARY STUDY ON THE SECONDARY DISASTERS INDUCED BY THE DAMAGE OF HIGH-RISE BUILDING ENVELOPS UNDER EARTHQUAKE

作　　者：黄秋昊[1] 黄盛楠[2] 陆新征[1] 胡皓宇[1] 汪家继[1] 

机构地区：[1]土木工程安全与耐久教育部重点试验室,清华大学土木工程系,北京100084 [2]北京科技大学土木与环境工程学院,北京100083

出　　处：《工程力学》2013年第B06期94-98,共5页Engineering Mechanics

基　　金：国家自然科学基金项目(51178249);国家科技支撑计划课题项目(2012BAJ07B012);清华大学自主研究项目(2010THZ02-1,2011THZ03);霍英东教育基金项目(131071)

摘　　要：近年来,我国在众多城市的中心地区建设了很多高层和超高层建筑。这些建筑物出于建筑外观考虑,大量采用玻璃幕墙等围护结构。一旦因地震导致围护结构破坏脱落,可能会造成严重的次生灾害。结构层间位移角过大是导致建筑物围护结构破坏的主要原因。因此,该文认为当层间位移角超过破坏临界层间位移角1/300时,会有玻璃幕墙围护结构破坏,并以一定的初速度飞出。基于高层建筑弹塑性时程分析的结果,计算得出围护结构脱落可能导致的伤害范围,并建议其安全避难距离,其成果可供地震逃生及避难研究参考。Many high-rise and super high-rise buildings have been constructed in the city centers of China. Due to the architecture requirement, glass curtain is widely used in high-rise buildings. If the glass curtain falls down from the high-rise building due to earthquake, serious secondary disaster may occur. The glass curtain damage is mainly induced by the large storey drift angle of a structure. In this paper, the glass curtain damage is considered when the storey drift angle exceeds the critical deformation, which is followed by the falling down of the fragments with a certain velocity. Based on the elasto-plastic time-history analysis results of a high-rise building, the injure range of glass curtain falling is predicted and the evacuation distance is suggested, which provides a reference for the earthquake evacuation research.

关 键 词：玻璃幕墙 高层建筑 地震 次生灾害 避难距离 

分 类 号：TU318[建筑科学—结构工程]