建筑结构抗连续性倒塌研究进展与发展趋势

Progressive collapse of structures to a large or whole extent may be triggered by the local failure under accidental loadings. The collapse of building structures has become an important issue that may seriously threaten public security, and it has also become a leading edge in the field of civil engineering, where many representative outcomes have been achieved. After the collapse of the WTC towers in the event of 9•11, domestic and international researchers have focused on progressive collapse of structures by investigating on collapse mechanism, robustness assessment and design methods of different types of structures. In this paper, the 9•11 event was first briefly reviewed. The primary progress in the experimental, numerical, and theoretical studies as well as design methods on the progressive resistance of building structures was then presented. The remaining issues of the existing studies, which have been generally limited to single disaster action and traditional structural forms, were pointed out. The research trends and key scientific and technical problems on numerical modeling, simplified analysis method, improved design method were proposed. This paper aims to provide a reference for the development of design theory of structures against progressive collapse.