Progressive Collapse Analysis Of Concrete Frame Buildings

Blast can cause serious damage to building structures as well as heavy loss of live and property. It is increasingly necessary and in fact required to carry out extensive research in this field. Therefore, it is an important task for the structure engineer that how to prevent progressive collapse when the building is exploded. The topic of blast effects on buildings is of widely interest to researchers and engineers all over the world. But the research in our country is still lag behind.In this paper,we reviewed the state of progressive collapse,and summaried the relevant design specifications in already some abroad resistance buildings collapse. Finite Element Method combined with the software ANSYS was applied in the analysis for frame structures. The achievements are as follows:1.In this paper, referencing the international research findings on resisting progressive collapse and combining the specific demand of alternative defensive ability, three methods is advised to analyze the alternative defensive ability, such as the alternate load path method, the specific local resistance method and the indirect design method. Every method has its applying condition and analytic process. At last, we point out that the alternate load path method can better simulate the process of collapse, and is suitable for structural failure analysis under any environment.2. ANSYS/STRUCTURE finite element code was applied for static analysis of a frame building which was modeled with BEAM189 and SHELL63 element. We analyzed the frame structure to check structural members in the alternate path structure, i.e. the structure after removal of a single column.3. At last, some measures to enhance the alternative defensive ability are proposed in this paper.Finally, the content of this thesis is summarized and some problems, which need further study, are proposed.