外置K形屈曲约束支撑与普通支撑钢框架受力性能对比分析  

Analysis on Mechanical Behaviors of K-type External Buckling Restrained Bracedand Ordinary Concentrically Braced Steel Frame

作　　者：李帼昌[1] 田飞 杨志坚[1] 张国忠 LI Guochang;TIAN Fei;YANG Zhijian;ZHANG Guozhong(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2020年第2期193-201,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51178276);沈阳市民用钢结构建筑产业化工程技术研究中心建设项目(F16-076-8-00)。

摘　　要：目的提出一种外置K形支撑-钢框架结构体系,分析K形屈曲约束支撑与普通支撑对钢框架抗震性能的影响,进而提高框架的抗侧刚度.方法采用ABAQUS建立有限元分析模型,通过分析拉压支撑轴力、超强系数、抗侧力和滞回曲线等参数,对比两种框架的受力性能.结果在支撑用钢量相同的情况下,长细比较大时,K形屈曲约束支撑框架的耗能能力和抗侧能力要优于普通支撑框架,K形屈曲约束支撑框架抗震性能明显更好;对于较小支撑长细比,K形屈曲约束支撑框架的耗能能力和抗侧能力与普通支撑框架相差较小,两者的抗震性能几乎一样.结论K形屈曲约束支撑相比于普通支撑,能够更好地增加钢框架结构的抗侧刚度,超强系数更高,滞回曲线更加饱满,耗能能力更好.The concept of moment resisting frames with K-type external braces is proposed to increase the lateral stiffness.Inorder to investigate the effect of seismic performance K-type buckling restrained brace and ordinary concentrically brace on steel frame.The finite element analysis model is established by ABAQUS,and the mechanical properties of the two frames are compared by analyzing the parameters of axial force,super strength coefficient,lateral force and hysteretic curve.The results showed that under the same steel volumes of braces,for large brace slenderness ratio,the energy dissipation capacity and lateral resistance of K-type BRBF is superior to common braced frame,and the seismic behavior of K-type BRBF is obviously better;For small brace slenderness ratio,the energy dissipation capacity and lateral resistance of K-type BRBF and common braced frame is little difference,both seismic behaviors is nearly the same;Compared with the ordinary concentrically brace,the overstrength coefficient and hysteretic behavior and the energy dissipation capacity are better.Applicable reference suggestions are given to K-type BRB and ordinary concentrically brace.

关 键 词：外置K形支撑 屈曲约束支撑 抗侧性能 滞回性能 有限元分析 

分 类 号：TU391[建筑科学—结构工程]