| Robustness is the means of that Building was attacked by Accidental loads do not occur continuity in collapse. Based on a Building that have been designed according to Chinese Specifications as calculation examples. The research for continuity of the collapse mechanism and continuity of force majeure collapse mechanism. And based on this basis, the continuity of the collapsed Control Design method of the structure was advanced. The main research work and results are as follows:(1) Key components of Multi-storey reinforced concrete structure what was fixed.How to choose key components is the first step that analysis of continuity in collapse and design of continuity in collapse. The limit state of the ability of bearing to loading as a concept was advanced and based on this, Sensitivity coefficient of components was defined that before and after of the components was demolished that rate of change of the ability of bearing to loading, Calculation method of Sensitivity coefficient was advanced. In this paper, plat frame and space frame as a model of calculation examples, The analysis of sensitivity was applied to model that to verified that the method whether applicable or not. And get to the Sensitivity coefficient of Representative components by using the calculation, In order to after the analysis to bedding.(2) For a building that the multi-storey reinforced concrete frame structure was designed by Chinese specifications, the research what continuity of the collapse mechanism was advanced by method of linear power removed component. Dynamic analysis of the collapse of continuity of the past was usually not take into account the first state of the structure, And compared to the fact is different. In this paper, the first static equilibrium state was considered, the Traditional Dynamic analysis method was improved what more closer the fact is possible. By improved method of linear dynamic removal of components, after the typical site was removed, Power response and Steady-state response of the structure was able to got, Through the comparison between same and different floors, The inner mechanics of progressive collapse mechanism of the structure and Law of continuity in collapse was summed up, To study the continuity collapse design methodology based on available.(3) Using nonlinear static Pushover incremental method to study a typical RC frame structures designed according to specifications of progressive collapse prevention of distribution of resistance. Based on risk assessment and failure of critical components of the structure are critical components of the sensitivity coefficient, absolute probability of collapse indicators were proposed. At the same time, incremental method based on Nonlinear static analysis of vertical bearing capacity of local resistance curves forward component failure indicator of bearing capacity of local reserves. From the point of view of the whole structure of the former evaluate the possibility of continuity in collapse of structure, structure of the latter from the local evaluation structure of continuity in terms of the possibility of collapse. Comprehensive evaluation of the two indicators is recommended to structure of continuity in collapse-proof performance, specific evaluation methods are given, and the examples in the text are evaluated. Calculations show that structural continuity in collapse-prone corner post failure, followed by side column and uprights. This match and linear dynamic analysis came to the conclusion, provide the basis for further study of continuity in collapse-proof design method.(4) The structural continuity of collapsed Control Design method, and the method that the specific process. The approach includes axis pressure than assessment method, simple assessment method, detailed assessment method3stage, each one of the methods of the content is based on the previous chapter of the analysis results, with a step-by-step approach to the structure and continuous collapse design of the specific requirements. |
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