（1 同济大学土木工程学院， 上海 200092；  2 同济大学土木工程防灾国家重点实验室， 上海 200092）

［摘要］英国结构工程师学会（IStructE）于2013年发布了结构抗连续性倒塌的风险评估指南，IStructE指南针对欧洲规范EN 1991\|1\|7中第3类高风险建筑提出了详细的风险评估步骤，包括确认结构可能遭受的灾害、确定可接受灾害的临界值、采取降低风险的控制措施并对其进行投入收益评估。对于不确定的偶然荷载，IStructE指南建议采用荷载重分布和局部保护设计的方法，分别通过验证构件去除后剩余结构的承载能力和关键构件的加强设计，提高结构抗连续性倒塌的性能。主要介绍IStructE指南结构风险评估和两种设计方法的具体步骤，并综合比较其他规范相关方法的优缺点和适用范围，为我国高层建筑结构抗连续性倒塌设计提供参考和建议。

［关键词］高风险结构； 连续性倒塌； 风险评估； 荷载重分布； 局部保护

中图分类号：TU311, O322    文献标识码：A    文章编号：1002-848X(2015)04-0033-08

Systematic risk assessment and design of structures against progressive collapse：

Introduction of IStructE manual

Jiang Jian1，  Li Guoqiang1, 2

（1 College of Civil Engineering, Tongji University, Shanghai 200092, China；2 State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China）

Abstract:The Institute of Structural Engineers (IStructE) in UK published a manual for risk assessment of highrisk structures against progressive collapse in 2013. This manual was concerned with detailed risk assessment steps on the 3rdclass structures in EN 199117, which involved identifying the hazards, determining the critical level of tolerable risk, taking risk reduction measures and performing a costbenefit assessment for each measure. Meanwhile, for unforeseeable accidental actions, two design methods of load redistribution and local protection were suggested. They were adopted  to enhance the resistance of structures against progressive collapse by examining the ability of structures to redistribute the loads from the loss of elements due to hazards and strengthening the key elements, respectively. The detailed steps to conduct the risk assessment and two design methods provided in the IStructE manual were mainly introduced. By comparing this manual with other relevant codes widely used, it aimed to provide useful recommendations for the design of highrise structures against progressive collapse in China.

Keywords:highrisk structure; progressive collapse; risk assessment; load redistribution; local protection

*国家自然科学基金(51120185001), 国家自然科学基金青年基金(51408418)。

作者简介：姜健，博士，Email:jiangjian_0131@163.com。

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