摩擦耗能部分自复位连接组合框架边节点抗震性能试验研究

发布时间：2018-11-10 11:38

【摘要】：为进一步研究摩擦耗能部分自复位连接新型卷边PEC柱-钢梁组合框架边节点的抗震性能,考虑PEC柱布置方式和柱顶竖向力2个设计参数设计制作3个缩尺试件并进行了拟静力下抗震性能试验研究。根据试验测试结果,对试件承载力、节点转动刚度、残余侧移角、滞回耗能和节点受力机理等方面进行了分析。研究结果表明:摩擦耗能部分自复位连接可通过摩擦板摩擦滑移耗散地震能和预拉杆实现自复位功效,且整个加载过程中结构主体构件梁柱处在弹性状态;PEC柱顶竖向力明显提高了其初始抗弯刚度,而其二阶效应加快了连接的耗能发展进程,且PEC柱的布置对初始抗弯刚度、刚度退化和耗能发展进程影响较小;试件SMJ 2加载至试验结束对应层间相对侧移3.182%,其残余侧移角小于0.005 rad,即具有极佳的自复位功效,试件SMJ 3加载至中震层间相对侧移限值1/50和大震层间相对侧移限值1/30,其残余侧移角分别小于0.005和0.01 rad,自复位功效良好,而试件SMJ 1在加载至中震层间侧移限值1/50,其残余侧移角小于0.01 rad,但随后加载产生的残余侧移角由于竖向力二阶效应而增大趋势明显,自复位功效相应减弱。
[Abstract]:In order to further study the seismic behavior of a new type of crimped PEC column-steel beam composite frame joints with partially self-reset friction energy dissipation, Considering the layout of PEC column and the vertical force of the top of the column, three scale specimens were designed and made and the seismic behavior of the specimen was tested under pseudo-static force. According to the test results, the bearing capacity of the specimen, the rotational stiffness of the joint, the residual lateral displacement angle, the hysteretic energy dissipation and the mechanical mechanism of the joint are analyzed. The results show that the friction energy dissipation partial self-reset connection can realize the self-reset effect by friction slip dissipation seismic energy and pre-tension rod, and Liang Zhu, the main member of the structure, is in elastic state during the whole loading process. The vertical force at the top of the PEC column obviously increases the initial bending stiffness, while the second order effect accelerates the energy dissipation development process of the connection, and the arrangement of the PEC column has little effect on the initial bending stiffness, stiffness degradation and energy dissipation development process. At the end of the test, the relative lateral shift between the corresponding layers is 3.182, and the residual lateral shift angle is less than 0.005 rad,. The residual lateral shift angle is less than 0.005 rad, and the residual lateral shift angle is less than 0.005 rad, and the residual lateral shift angle is less than 0.005 rad, and the residual lateral shift angle is less than 0.005 rad, and the residual lateral shift angle is less than 0.005 rad, and the residual lateral shift angle is less than 0.005 rad, and the residual lateral shift angle is less than 0.005 rad,. However, the residual lateral shift angle of the specimen is less than 0. 01 rad, after loading to the limit of 1 / 50 of the lateral displacement between the mesoearthquake layers. However, the residual lateral shift angle produced by the later loading increases obviously because of the second order effect of vertical force, and the self-reset effect is weakened accordingly.
【作者单位】：苏州科技大学土木工程学院;
【基金】：国家自然科学基金资助项目(51078247;51478286) 江苏省“青蓝工程”中青年学术带头人资助项目(2014) 江苏省“六大人才高峰”高层次人才计划资助项目(2016)
【分类号】：TU352.11

【相似文献】