摘要
结构发生连续倒塌的机理比较复杂,国内外目前为止没有统一的结构抗连续倒塌性能评估标准。文中参考日本《高冗余度钢结构倒塌控制设计指南》中的结构抗连续倒塌性能评估方法,对其性能评估指标进行了改进量化,并通过3个5层模块化装配式钢结构算例验证改进后评估方法对装配式钢框架结构的适用性。算例分析表明:平面去斜支撑钢框架、平面钢框架和空间钢框架竖向荷载作用下发生连续倒塌的可能性依次变大,该规律和理论分析一致,改进后的评估方法能够定量评估模块化装配式钢结构的竖向抗连续倒塌性能。利用改进后评估方法对国内某九层模块化装配式钢框架结构进行了竖向抗连续倒塌性能评估,评估结果表明该工程实例的抗连续倒塌性能满足要求。
There are no uniform assessment standards of progressive collapse due to the complex mechanism of progressive collapse both at home and abroad so far. Performance evaluation method from Guidelines for Collapse Control Design ： Construction of Steel Buildings with High Redundancy of Japan has been for reference in this paper and the performance evaluation indexes are improved quantified after 3 modular prefabricated steel structure numerical example validating the application of the evaluation method. The numerical examples show that the progressive collapse possibility under vertical load of plane frame structure without the inclined support, the plane frame structure and space frame structure become larger in turn, the pattern is correspond to theoretical analysis which illustrate that the improved evaluation method could quantitatively assess the vertical anti-progressive collapse of modular prefabricated steel structure. The vertical anti-progressive collapse performance of the nine-story modular prefabricated steel structure is evaluated by using the improved method and the evaluation results show that the performance to resist progressive collapse turns out to be able to meet the need.
出处
《建筑科学》
CSCD
北大核心
2015年第11期86-91,97,共7页
Building Science
基金
国家自然科学基金项目(钢框架结构的适用性研究及可靠度分析
51278178)
关键词
模块化装配式钢结构
连续倒塌
评估方法
性能评估
modular prefabricated steel structure
progressive collapse
evaluation method
performance evaluation.
