摘要
设计了一榀应用H型钢锚固型连接节点的屈曲约束支撑-混凝土框架(BRBCF)并进行拟静力试验研究,通过ABAQUS软件进行有限元模拟,有限元分析结果与试验结果滞回曲线饱满,吻合度良好。在此基础上,为研究轴压比和屈曲约束支撑芯材厚度对框架抗震性能的影响,分别建立轴压比为0.35~0.75的4个有限元模型和芯材截面积从1 000~6 250 mm^2的7个有限元模型。研究结果表明:轴压比对BRBCF受力影响较小,随着轴压比的提高,承载力会有轻微下降;支撑芯材截面积对框架抗震性能的影响较大,随着截面积的增加,承载力会明显提高,连接节点位置的不平衡内力明显增大,造成该区域的破坏相对严重。
One 1/3 scale 2-story 3-bay BRB-concrete frame（ BRBCF） with H-shaped steel embedded joint was tested by pseudo static test. Then based on the test,in order to study the effect of axial compression ratio and steel core cross-section area on seismic behavior on BRBCF,4 models of axial compression ratio from 0. 35 to 0. 75 and 7models of steel core cross-section area from 1 000 to 6 250 mm^2 were established. The results showed that the calculated results were in good agreement with the experimental results,the hysteretic curve of BRBCF was plump;the effect of axial compression ratio on seismic behavior was small,and the bearing capacity decreased slightly with the increase of the axial compression ratio; the changes in the cross-section area of steel core of BRB had a great influence on the result. With the increase of section area,the bearing capacity would be significantly increased,which also made the unbalance internal force of the connection joint be increased,resulting in a relatively serious destruction of the connecting region.
出处
《工业建筑》
CSCD
北大核心
2017年第3期1-6,共6页
Industrial Construction
基金
国家自然科学基金项目(51178276)
辽宁省高等学校创新团队支持计划课题(LT2014012)
关键词
屈曲约束支撑
混凝土框架
拟静力试验
有限元分析
抗震性能
轴压比
连接节点
buckling restrained brace
concrete frame
pseudo static test
finite element analysis
aseismic behaviour
axial compression ratio
connection joint
