强震下混凝土结构渐进倒塌性能分析与设计新进展

对重大工程结构进行强地震作用下的渐进倒塌全过程分析并建立相应的设计方法已成为当前地震工程领域的发展趋势．现行抗震设计规范中针对结构临界倒塌状态的界定、抗倒塌性能与倒塌机制的评估方法等方面已不能适应发展迅速的结构性能优化设计理论和日趋复杂的建筑使用环境的要求．围绕结构渐进倒塌过程分析、相关设计规范或指南、结构抗渐进倒塌性能及其设计以及结构渐进倒塌地震损伤性能评估4个方面的最新研究进展进行了回顾，并指出了其中存在的一些问题．

Advances in progressive collapse analysis and design of concrete structures subjected to strong earthquakes

There has been a tendency in the field of earthquake engineering to make an overall progressive collapse analysis of and establish a corresponding design method for major projects＇ concrete structures subjected to strong ground excitations. Design provisions in current code for seismic design of buildings on the definition of structural critical collapse state and on the evaluation methods for collapse resistance and collapse mechanism, etc, could not meet the requirements of the rapidly developing methodology in performance-based structural design and the increasingly complicated building environments. Some newest advances in the four respects are critically reviewed, i. e. , 1 ） progressive collapse analysis methods ; 2） design codes or guidelines ; 3 ） structural resistance to progressive collapse and its design; and 4 ） evaluation of structural also pointed out. damage in progressive collapse process. Some problems are