摘要
进行了四个型钢与混凝土后锚固连接节点的低周反复加载试验,采用化学植筋式连接方式。试件破坏前钢筋均达到屈服,仅钢筋周围的混凝土发生局部破坏,可判断为钢材破坏。随着埋深的增加,试件的屈服荷载和峰值荷载均有不同程度的提高。滞回曲线、刚度退化曲线、延性及耗能等抗震指标均显示该类节点具有较好的抗震性能,达到峰值荷载后承载力无明显降低,仍能以自身的变形能力吸收地震能力,增加埋深和植筋数量有助于提高节点的抗震性能。
Four steel-to-concrete connections made with bonded-in reinforcement under re versed cyclic loading have been tested.The results show that steel bars reach y ield strength before connection failure and the ultimate capacity is governed by strength of reinforcement following slight concrete cone failure nearby.Both y ield load and ultimate capacity of connections increase individually with more e mbedment depth of bonded-in reinforcement.Seismic characteristics of hysteresi s curves,ductility and dissipation are used to draw conclusions that the connec tions would behave without significant reduction of loading capacity after maxim um value and appropriate deformability is beneficial to dissipate earthquake ene rgy.Increased embedment depth and added amount of bonded-in reinforcements are helpful to improve seismic performance of connections.
出处
《土木工程与管理学报》
2011年第3期299-302,共4页
Journal of Civil Engineering and Management
基金
山东省建筑结构鉴定加固与改造重点实验室开放课题(JG01)
济南大学博士基金(XBS0802)
关键词
低周反复
后锚固
型钢-混凝土节点
延性
reversed cyclic loading
post-installed anc hors
steel-to-concrete connections
ductility
