高鑫, 王新武, 余永强,等.装配式三层K形偏心支撑钢框架抗震性能研究[J].河南理工大学学报（自然科学版）,2021,40(5):167-174.

GAO X, WANG X W, YU Y Q, et al.Seismic behavior study of the fabricated K-shaped eccentrically braced steel frame[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(5):167-174.

装配式三层K形偏心支撑钢框架抗震性能研究

高鑫1, 王新武2, 余永强1, 时强2, 苏进3, 王德艺2

1.河南理工大学 土木工程学院，河南 焦作 454000;2.河南省新型土木工程结构国际联合实验室，河南 洛阳 471023;3.河南方圆工业炉设计制造有限公司，河南 洛阳 471000

摘要:为研究装配式三层K形偏心支撑钢框架在低周循环荷载作用下的滞回性能和耗能特性，对三层K形装配式偏心支撑平面钢框架进行拟静力试验，并对3个不同耗能梁长度模型进行有限元非线性分析，主要研究破坏形式、滞回性能、刚度退化率、极限承载能力、延性系数和耗能能力等。结果表明，滞回曲线呈现出一定的“捏缩”现象，随着耗能梁长度增加，框架极限承载力、耗能能力均呈下降趋势，滞回曲线捏缩现象加剧。三层装配式K形偏心支撑框架结构具有较好的承载能力，良好的变形能力，较传统的焊接偏心支撑钢框架延性大。研究结果为装配式K形偏心支撑钢框架的抗震设计提供参考依据，具有一定的工程实践意义。

关键词:滞回性能;K形偏心支撑钢框架;装配式;拟静力试验;有限元非线性分析

doi:10.16186/j.cnki.1673-9787.2020020045

基金项目:国家自然科学基金资助项目（51678284）；河南省科技创新杰出人才项目（184200510016）

收稿日期:2020/02/19

修回日期:2020/04/20

出版日期:2021/09/15

Seismic behavior study of the fabricated K-shaped eccentrically braced steel frame

GAO Xin1, WANG Xinwu2, YU Yongqiang1, SHI Qiang2, SU Jin3, WANG Deyi2

1.College of Civil Engineering,Henan Polytechnic University,Jiaozuo  454000 ,Henan,China;2.Henan International Joint Laboratory of New Civil Engineering Structure,Luoyang  471023,Henan,China;3.Henan Fangyuan Industrial Furnace Design and Manufacturing Co. ,Ltd. ,Luoyang  471000，Henan，China

Abstract: In order to study the hysteretic performance and energy dissipation characteristics of the fabricated K-shaped eccentrically braced steel frame under low-cycle cyclic loading,a pseudo-static test and nonlinear analysis of three finite element models were carried out. The main researches were the damage form,hysteresis performance,stiffness degradation rate,ultimate bearing capacity,ductility and energy dissipation capacity of this structural system. The results showed that the multi-layer fabricated K-shaped eccentrically braced frame had better capacity,good deformation,and greater ductility than the traditional welded eccentrically braced steel frame,but the hysteresis curve showed a certain " pinching" phenomenon. With the increase of the length of the link,the ultimate bearing capacity and energy-dissipation capacity of the frame showed a downward trend,and the phenomenon of pinching of the hysteresis curve increased. This study provided a reference for the seismic design of fabricated K-shaped eccentrically braced steel frames,which had certain engineering practical significance.

Key words:hysteresis performance;K-type eccentrically braced steel frame;semi-rigid connection;pseudo static test;nonlinear analysis of FEM

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