K型偏心支撑钢框架结构的恢复力模型  

Restoring Force Model of K-eccentrically Braced Steel Frame Structure

作　　者：蔡文杰 杨扬[2] 卢坤林[2] CAI Wenjie;YANG Yang;LU Kunlin(School of Civil Engineering and Architecture,Anhui University of Technology,Maanshan 243032,China;School of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]安徽工业大学建筑工程学院,安徽马鞍山243032 [2]合肥工业大学土木与水利工程学院,安徽合肥230009

出　　处：《安徽工业大学学报（自然科学版）》2021年第3期324-331,共8页Journal of Anhui University of Technology（Natural Science）

基　　金：安徽省自然科学基金项目(1508085QE87)。

摘　　要：利用有限元软件ABAQUS,建立6种支撑节点角度的K型偏心支撑钢框架结构模型,模拟分析K型偏心支撑钢框架结构的滞回特性;基于模拟分析得到的模型骨架曲线、滞回曲线,对各加载阶段的特征值进行拟合,得到骨架曲线模型回归方程和刚度退化规律,建立K型偏心支撑钢框架结构的恢复力模型;对比分析恢复力模型与有限元计算结果的骨架曲线,验证恢复力模型的正确性。结果表明:恢复力模型与有限元分析结果吻合程度较高,建立的恢复力模型可为K型偏心支撑钢框架结构的弹塑性变化及抗震分析研究提供参考。The finite element software ABAQUS was used to establish K-eccentrically braced steel frame models with six kinds of support node angles,and the hysteretic characteristics of K-eccentrically braced steel frame structure were simulated and analyzed.Based on the skeleton curve and hysteretic curve of the model obtained from the simulation analysis,the eigenvalues of each loading stage were fitted,the regression equation of the skeleton curve model and the stiffness degradation law were obtained,and the restoring force model of K-eccentrically braced steel frame structure was established.The skeleton curves of restoring force model and the finite element calculation results were compared to verify the correctness of the restoring force model.The results show that the restoring force model is in good agreement with the finite element analysis results.The established restoring force model can provide a reference for the elastic-plastic change and seismic analysis of K-eccentrically braced steel frame structure.

关 键 词：偏心支撑 恢复力模型 钢框架 

分 类 号：TU391[建筑科学—结构工程]