The Capability Evaluation Of Prefabricated Steel Frame Structure With Inclined Support Joints To Resist Progressive Collapse

With the accelerated rate of urban moderniza tion and the rapid development of the national economy,the unprecedented development of housing industry has pr omoted China's housing industialation. Increasing the proportion of green domestic steel building is considered to be the positive way to dissolve excessive steel production capacity with up-downstream linkaging upgrade in recent years. Prefabricated steel structure is suitable for factory production, and accord with environmental pr otection policies advocated by the state, thus it has a good appli cation prospect.Since the 911 incident, the structure's anti-progressive collapse has become a focus in the study of engineering, research is mainly focus on the concrete structure at home and abroad.the study of anti-progessive collapse focused on ordinary steel frame and large span steel structure. Ability evaluation method of anti-progressive collapse was studied in this paper, and the ability assesement of anti-progressive collapse was carried on a nine-story prefabricated steel frame structure with in clined support joints.Taking a nine-story prefabricated steel frame structure with inclined support joints as engineering background, evaluation method,ability assesement as well as linear static analysis method in progressive collapse specifications was studied on prefabricated steel frame structure with inclined support joints.Prefabricated steel structure and the basic concept and characteristics of progressive collapse was firstly introduced,as well as the development prefabricated steel structure and research history and status quo of progressive collapse at home and abroad.Then the evaluation method of the ability of anti-progressive collapse of prefabricated steel frame structure with inclined support joints was stuied, according to the simple evaluation methods from?Guidelines for collapse control design: constru ction of steel buildings with high redundancy? of Japan, the improvement Suggestions of ability evaluation index for the assessment methods was put forward aimed at prefabricated steel frame structure with inclined support joints, along with the applicability demonstration of the improved proposal through a set of prefabricated steel frame structure with inclined support joints numerical examples.The finite element program SAP2000 was adopted to conduct the ultimate bear-ing capacity analysis with static nonlinear method and progressive collapse analysis in detail with dynamic nonlinear method on the nine-story prefabricated steel frame structure with inclined support joints. According to the results of analysis and calculation, the structure's capability to resist progressive collapse was carried out with the improved evaluation method, it shows that structure's performance of resisting pr ogressive collapse turned out to be able to meet the ne ed, the structure's anti-progressive collapse performance of corner column is better than that of inner column. In addition, the safety margin of trussed beam is higher than that of the column.Finaly, the anti-progressive capability of the nine-story prefabricated steel frame structure with inclined support joints was evaluated with static linear method from the anti-progressive collapse standards from America's GSA2003, Dod2013, and China's JGJ 3-2010 Technical specification for concrete structures of tal l building respectly, and fetures of various specifications was compared at last...