门式刚架端板连接节点半刚性的非线性有限元分析  

Nonlinear finite element analysis of semi-rigid nodes of the end-plate connection in portal frame

作　　者：方垒[1] 徐伟良[1] 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310032

出　　处：《浙江工业大学学报》2008年第4期451-455,共5页Journal of Zhejiang University of Technology

摘　　要：门式刚架中普遍采用的端板类连接是典型的半刚性节点连接,在介绍门式刚架端板节点的形式及其受力性能的基础上,采用接触单元来模拟端板连接节点的半刚性,预应力单元来模拟螺栓的预拉力,利用ANSYS软件对门式刚架半刚接节点进行了非线性有限元分析,深入分析了半刚性节点中加劲肋、端板厚度、螺栓直径变化对其性能的影响.通过计算表明,端板半刚性连接加劲肋、端板厚度、螺栓直径变化对节点域的剪切性能和梁柱腹板的受力性能均有较大影响.建议在设计中应采取相应措施,考虑节点半刚性的不利影响.The end-plate connection in portal frame is a typical semi-rigid nodes connection. The semi-rigid nodes of the end-plate connection and the bolt prestress were respectively simulated by the contact element and prestress element based on the presentation of forms the end-plate connection and performance of forces. And the nonlinear finite element of semi-rigid nodes in portal frame was analyzed by the ANSYS software. Effect of adding vigor rib, the end-plate thickness, varieties of bolts diameter of semi-rigid nodes on the capability was further analyzed. The calculation showed that the adding vigor rib, the end-plate thickness, varieties of bolts diameter of semi-rigid nodes connection existed a considerable effects on the nodes field＇s cut stress and capability of force of girder and column. So we suggested that the corresponding measures must be taken in the design so as to avoid the disadvantageous effects of the semi-rigid nodes.

关 键 词：半刚性节点 门式刚架 有限单元法 接触单元 预应力单元 

分 类 号：TU392.5[建筑科学—结构工程]