摘要
通过对在节点核心区应用X配筋增强的异形柱边节点和同等条件下未被增强的异形柱边节点进行拟静力试验研究,对比分析了异形柱边节点的破坏特征、滞回曲线、承载能力、位移及延性等抗震性能指标,研究边节点核心区的箍筋应变的变化规律,应用累积损伤模型对异形柱节点进行累积损伤分析。研究结果表明:在异形柱边节点核心区加入X形配筋可以改善节点的滞回特性,增加边节点位移延性,减轻节点的累积损伤,从而提高异形柱边节点的抗震性能。
The exterior joint of specially shaped columns with or without X-shaped reinforcement was tested under low cyclic loading.The damage characteristic,hysteretic curve,bearing capacity,displacement,ductility and energy dissipation were compared.The change of the stirrup strain of the core of joint was studied.The cumulated damage was analyzed using the damage accumulation model at last.It is shown that the hysteretic behavior of the joint with X-shaped reinforcement is improved significantly,the ductility is enhanced and the degree of cumulated damage is relieved.Therefore,the overall seismic behaviour of specially shaped column joints with X-shaped reinforcement is improved significantly.
出处
《工程力学》
EI
CSCD
北大核心
2013年第4期157-161,共5页
Engineering Mechanics
基金
国家自然科学基金项目(50878141)
河北省自然科学基金项目(E2011202013)
河北省高等学校科学技术研究青年基金项目(Q2012083)
河北省建设科技研究计划项目(2012-162)
关键词
异形柱
边节点
低周往复荷载
X形配筋
抗震性能
specially shaped column
exterior joint
low cyclic loading
X-shaped reinforcement
seismic behavior
