【作者】 黄慎江； 曹蓉；

【Author】 HUANG Shen-jiang;CAO rong;Heifei University of Technology;

【机构】 合肥工业大学；

【摘要】 为研究不同节点刚度对预压装配式预应力混凝土框架结构抗连续倒塌性能的影响,本文利用midas/gen软件建立7层预压装配式预应力混凝土框架结构并进行静力弹塑性分析,通过设置半刚性节点与全刚性节点,分析不同节点刚度下预压装配式预应力混凝土框架的抗连续倒塌承载能力、变形能力。分析结果表明:全刚性结构的抗连续倒塌承载力高于半刚性结构,提高节点刚度可以提高结构抗连续倒塌承载力;但半刚性结构的相对抗力峰值所发生的节点位移要大于全刚性结构,表明半刚性结构的变形能力优于全刚性结构;而两种结构体系下的破坏程度都为角柱大于长边中柱大于短边中柱。加强梁柱节点间的连接性能,可以有效提高预压装配式PC框架的抗连续倒塌能力。更多还原

【Abstract】 In order to study the progressive collapse of the PC frame under the influence of different joint stiffness,MID AS/Gen software was used to build a 7-story pre-stressed precast concrete frame to conduct pushover analysis in this paper,which could understand the progressive collapse bearing capacity and deformation capacity of the PC structure by setting the semi-rigid node and the rigid node.Analysis results showed that resist progressive collapse of the rigid node was above the semi-rigid structure,which conclude that increasing the stiffness of nodes could improve the progressive collapse capacity.However,the nodal displacement of peak resistance of semi-rigid structure was larger than that of the rigid node structure,which indicated that the deformation ability of semi-rigid structure was better than that of the rigid node structure;and the destruction of semi-rigid structure was corner column heavier than long side column than short side column,which was the same as the rigid node structure.In conclude,strengthening the connection performance of the beam-column nodes could effectively improve the anti-progressive collapse pre-stressing fabricated PC frame.更多还原