地震荷载下双腹板-顶底角钢连接半刚接钢框架的动力特性研究  

STUDY ON DYNAMIC CHARACTERISTIC OF THE STEEL FRAMES WITH SEMI-RIGID CONNECTION OF TOP AND SEAT ANGLES WITH DOUBLE WEB ANGLE

作　　者：完海鹰[1,2] 王建国[2] 王秀喜[1] 

机构地区：[1]中国科学技术大学近代力学系,合肥230009 [2]合肥工业大学土木建筑工程学院,合肥230009

出　　处：《工程力学》2011年第4期145-150,共6页Engineering Mechanics

基　　金：安徽省自然科学基金项目(070414175)

摘　　要：利用大型有限元分析软件ANSYS对双腹板、顶底角钢半刚性连接的钢框架进行了三维弹塑性动力有限元分析。该分析采用了有限元实体建模,考虑了钢框架连接节点的非线性、几何非线性以及材料非线性等因素。通过有限元数值模拟分析得出了在地震荷载作用下,半刚性节点刚度的变化对钢框架的基本自振周期、楼层剪力、楼层位移、楼层加速度和节点的弯矩-转角关系的影响规律,并将部分数值模拟分析结果与拟动力试验结果进行对比,发现这两种研究方法所得结果基本一致。通过该文的分析,得出了节点刚度的变化对结构动力特性影响的一般规律,为今后高层钢结构设计和钢结构规范的修改提供了一定的理论依据。Based on ANSYS finite element software,the performance of connections and the nonlinearities of geometry and material are considered,and the nonlinear finite element analysis of a steel frame with semi-rigid connections of top and seat angles with double web angles is conducted.The natural period of vibration,shear forces,displacements,accelerations of floors as well as the hysteresis loops of the steel-frame semi-rigid connection are obtained.The numerical results are compared with pseudo-dynamic experimental results,they are consistent well each other.The influence of semi-rigid connection＇s flexibility on the steel frame is also explored,which provides some references for the design of a steel frame with semi-rigid connections and the amendment of the specification of the Steel structure in the future.

关 键 词：半刚接 钢框架 地震响应 拟动力试验 有限元分析 

分 类 号：TU391[建筑科学—结构工程] TU311.3