第48卷 第 6期
2016年 12月
西安建筑科技大学学报 (自然科学版)
J.Xi’an Univ.ofArch.&Tech.(Natural Science Edition)
Vlo1.48 NO.6
Dec.2016
DOI:10.15986~.1006-7930.2016.06.008
新 型 自 复 位 方 钢 管 混 凝 土 框 架 的 抗 侧 刚 度 研 究
王 先 铁 2, 刘 立 达 , 周 绪 红 , 贺 博 , 郑 江
(1.西安建筑科技大学土木工程学院,陕西 西安710055;2.重庆大学土木工程学院,重庆 400030)
摘要 :提出一种新型绕梁腹板销轴转动的自复位方钢管混凝土框架梁柱连接节点 .推导了自复位方钢管混凝土框架的抗侧刚
度计算公式,通过有限元分析验证了公式的正确性.研究了钢绞线截面面积和初始预应力大小对 自复位方钢管混凝土框架自
复位能力的影响,探明了自复位框架的失效机制.结果表明:自复位方钢管混凝土框架具有良好的自复位能力,框架构件保
持弹性 .随着钢绞线截面面积增大,自复位框架刚度和承载力增大;钢绞线处于弹性时,初始预应力大小对 自复位框架刚度
影响很小 .初始预应力合理取值可避免自复位框架失效机制的发生,并给出了初始预应力取值范围.
关键词:自复位方钢管混凝土框架;抗侧刚度;初始预应力;自复位性能;失效机制
中图分类号:TU398.2 文献标志码 :A 文章编号:1006—7930(2016)06—0819—07
Study 0n lateral stiffness 0f new type self-centering concrete filled square steel
tubular lram e
ⅣGXiantieI,Z . LIULida ,ZHOUXuhong~,舰 Bo ,ZHENGJiang
(1.School ofCivil Engineering.Xi an Univ.ofArch.&Tech.,Xi an 710055,China:
2.School ofCivil Engineering,Chongqing University,Chongqing 400030,China)
Abstract:A new type self-centering beam.column ioint rocking about the pin roll located in the centerline of the beam web is pro— posed for concrete filled square steel tubular(CFSST)flame.The lateral stiffness calculation formula of the self-centering CFSST frame was derived from the virtual work principle.The formula was verified by finite element analysis.The influences of the section
area of strands and initial prestress on the self-centering ability of CFSST flame were studied.The failure mechanism of the self-centering frame was determined.The results show that the self-centering CFSST frame has good resilience,and the flame ele. ments remain elastic during the rotation.With the increase of the section area of strands,the stiffness and bearing capacity of the self-centering CFSST frame increase.The initial prestress of strands has little effect on the lateral stiffness of self-centering frame when the strands are elastic state.The failure mechanism of the self-centering flame can be prevented by the reasonable value of
initial prestress.The recommended value range of initial prestress iS proposed.
Key words:Self-centering concrete filled square steel tubular frame;lateral stiffness;initial prestress:self-centering performance;
failure mechanism
我 国现 阶段 的抗震 思想是 “小震 不坏 ,中震可
修 ,大震 不倒 ”L1 J。目前 ,“小 震不坏 和 大震 不倒 ”
已经 可 以做到 ,但是 对于 “中震 可修 ” 的实现 缺乏
具体 做法 .震后 会 因为主体 结构 发 生较大 的 塑性变
形而 导致 结构
新型自复位方钢管混凝土框架的抗侧刚度研究(论文).pdf