梁腹板开圆孔节点的分析模型  

Analysis Model of Beam-to-Column Connection with Opening in Beam Web

作　　者：李波[1] 杨庆山[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《北京交通大学学报》2009年第4期101-105,共5页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金资助项目(50278001);北京交通大学科技基金项目资助(2007XM029)

摘　　要：在距柱表面一定距离的梁腹板上开设一定大小的孔洞是改善钢框架结构抗震性能的一种有效手段,文中结合试验结果提出了梁腹板开圆孔节点的分析模型.为了能够在结构的弹塑性分析中考虑梁腹板开圆孔节点的影响,除在梁端、柱端设置塑性铰外,还应在腹板孔削弱处增设塑性铰.新增塑性铰位于腹板削弱区域最危险截面处,其弯矩-转角关系与普通实腹式钢梁一致,仅屈服点存在一定的差异.利用该模型对梁腹板开圆孔节点的拟静力试验及含梁腹板开圆孔的钢框架抗震性能试验进行了模拟,其结果能满足工程要求.Opening in beam web is an effective method resisting frame （MRF）, and the non-linear analysis to improve the seismic behavior of steel moment model of the beam-to-column connection with opening in beam web （OBW） is provided based on test results. The opening in beam web can be simulated by a plastic hinge located on beam with 0.45R away from the opening center （ R is opening radius）, and the load-deformation curve of the plastic hinge is the same as steel beam only with some difference in yielding loads. Compared with test results, numerical analysis using the non-linear model of the OBW connection can offer the seismic responses and failure mode of steel moment frame.

关 键 词：钢框架 梁柱节点 弹塑性 分析模型 试验验证 

分 类 号：TU973.13[建筑科学—结构工程]