MECHANISM OF PROGRESSIVE COLLAPSE RESISTANCE OF REINFORCED CONCRETE SPATIAL FRAME STRUCTURE

摘要：

　　Progressive collapse is spatial,and effected by structural redundancy.Therefore a spatial frame is more realistic than a plane frame to reflect the spatial characteristic of progressive collapses.Based on the experimental research on progressive collapse performance,mechanism of progressive collapse resistance of reinforced concrete spatial flame structure is analyzed in this paper.In the case of the initial local damage of the middle-side column of the first floor,the entire collapse process can be divided into four stages,namely elastic stage,elastoplastic stage,plastic hinge development phase and compound mechanism stage.Progressive collapse resistance consists of beam mechanism and catenary mechanism.As for the longitudinal frame,beam mechanism and catenary mechanism both play a part in resisting progressive collapse,while only catenary mechanism works as for the transverse frame.In the compound mechanism stage,progressive collapse resistance is not the simple addition of utimate capacity of beam mechanism and catenary mechanism.With the displacement development,beam mechanism gradually reduced,but catenary mechanism enhance little by little.They are changing.The degree of role of beam mechanism or catenary mechanism is related to the plastic deformation ability of flame beams.

关键词： Reinforced conerete structural frames experiments mechanism progressive collapse

作者: Jingang Xiong Yan Li Zhaoqiang Wu Gengfeng Hou Yinong He

作者单位: School of Architectural Engineering, Nanchang University, Nanchang 330031, P.R.China

会议类型: 国际会议

会议名称: The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)

会议地点: 武汉

会议语种:英文

页码: 1390-1394

在线出版日期: 2012-11-17（万方平台首次上网日期，不代表论文的发表时间）