摘要
摒弃传统的梁端对称加载方式,采用更符合实际受力特点的柱端加载,对剖分T型钢连接的中框架节点进行低周反复荷载试验研究。试验结果表明:加载过程中T型件翼缘与腹板交界处的应力最大,最先形成塑性铰;柱翼缘和梁翼缘在加载过程中均处于弹性阶段,而节点域的剪切应变达到了屈服应变。通过测量发现梁柱相对转角达到了美国规范的要求,并且由滞回曲线和骨架曲线可知该节点具有较好的延性和耗能特性。
The column loading is adopted instead of the traditional symmetric beam-end loading to carry out the low cyclic loading test on the mid-frame joint of t-stub the connection,which is more in accordance with the practical loading features. The test results show that the maximum stress occurrs at the junction between the flange and web,where the plastic hinge appears firstly; during the loading process,the column flange and the beam flange are both at the elastic stage,yet the shear strain of the node area turns into the yield strain. The test demonstrates that beam column relative angle meets the requirements of the American specification. Meanwhile,the preferable ductility and energy dissipation of the joint are testified by the hysteretic curve and the skeleton curve.
出处
《工程抗震与加固改造》
北大核心
2015年第6期15-22,共8页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金(51278238)
河南省科技创新杰出青年基金项目(134100510010)
河南省科技攻关项目(122102210550)
关键词
柱端加载
中框架节点
低周反复荷载
滞回性能
耗能特性
column top loading
cross frame joint
cyclic loading
hysteretic performance
energy dissipation characteristics
