结构抗连锁倒塌问题研究

Study on progressive collapse analysis of structure

如何保证结构的整体性,并防止其局部破坏所造成的结构连锁倒塌问题,已经得到工程设计和研究者的广泛重视。近年来,欧美国家颁布了结构抗连锁倒塌设计标准,并提出抗连锁倒塌设计是结构多灾害防治的一种手段。改善结构的整体强劲性,是抗连锁倒塌设计主要解决的问题。通过对国内外连锁倒塌和结构整体强劲性研究发展状况的简要评述,主要介绍了连锁倒塌分析与整体强劲性的定义,讨论了整体强劲性分析和评价的不同方法以及改善整体强劲性的措施。最后,探讨了结构抗连锁倒塌与整体强劲性分析有待研究的问题。

The provision of structure integrity to avoid major failure and progressive collapse of structures caused by local failure under abnormal loading is a major concern for design engineers. In recent years, codes and standards of Europe and USA proposed qualitative criteria, in which the progressive collapse analysis has been a measure for studying the multi-hazard protection of the structure. Improving the structural entirety robustness is the primary approach. By surveying the research situation at home and abroad, the definitions are introduced for the progressive collapse analysis and entirety robustness, and the different analysis and evaluation method and the measures for improving entirety robustness of structure are discussed. Finally, the problems to be researched for further analysis of the topic were presented.