K形偏心支撑钢框架耗能单元抗震性能数值分析  

Numerical Analysis of Seismic Behavior on Energy Consumption Unit of K-shaped Eccentrically Braced Steel Frame

作　　者：张光伟[1] 孟宏睿[1] 林友军[1] Zhang Guang-wei;Meng Hong-rui;Lin You-jun(School of Civil Engineering and Architecture,Shanxi Sci-Tech University,Hanzhong 723000,China)

机构地区：[1]陕西理工大学土木工程与建筑学院,陕西汉中723000

出　　处：《工程抗震与加固改造》2018年第6期51-57,共7页Earthquake Resistant Engineering and Retrofitting

基　　金：陕西理工大学科研计划资助项目(SLGKY2017-14)

摘　　要：为研究K形偏心支撑钢框架耗能单元的抗震性能,利用有限元软件ABAQUS建立模型并进行非线性数值分析,研究了梁柱线刚度比、耗能段长度和轴压比变化对其抗震性能的影响。研究表明:K形偏心支撑钢框架耗能单元具有良好的滞回能力,梁柱线刚度比越大,其承载力越高、刚度越大,但耗能能力和延性越差;耗能段长度越大,其承载力越低、刚度越小;轴压比越大,其承载力越低、耗能能力越差,轴压比大于0.6时,轴压比增大其刚度和延性呈减弱趋势。In order to study the seismic performance of energy consumption unit of K-shaped ecc-entrically braced steel frame,the model is established by using the finite element software ABAQ-US, and the numerical analysis is carried out.The impact of the linear stiffness ratio of beam-column,length of link beam and axial load ratio on the seismic performance of the model is studied. The research shows that: K-shaped eccentrically braced steel frame has good hysteretic capacity,when the beam-column linear stiffness ratio increases,the bearing capacity is higher,and the stiffness is greater,but the ductility and energy dissipation capacity is worse;when the energy dissipation length increases,the bearing capacity is lower,and the stiffness is smaller,but the ductility is almost the same;when the axial compression ratio increases,the bearing capacity is lower,the energy dissipation capacity is worse,and when the axial compression ratio is more than 0.6,the axial compression ratio increases but the stiffness and ductility decrease.

关 键 词：K形偏心支撑 梁柱线刚度比 耗能段长度 轴压比 

分 类 号：TU391[建筑科学—结构工程]