预应力高强混凝土管桩-承台组合体节点抗震性能试验研究  

Seismic Performance Experimental Research on Combination Nodes of PHC and Pile Caps

作　　者：李艳艳[1,2] 陈艳风[1] 刘坤[3] 韩红霞[1,2] 

机构地区：[1]河北工业大学土木工程学院,天津300401 [2]河北省土木工程技术研究中心,天津300401 [3]河北工业大学校园规划处,天津300401

出　　处：《建筑科学》2014年第1期98-102,130,共6页Building Science

基　　金：河北省科技支撑计划项目(编号:12276124)

摘　　要：为研究预应力高强混凝土管桩的抗震性能,对5个预制桩身与后浇筑承台的组合体试件节点进行低周往复拟静力加载试验,分析5个组合体试件节点的破坏特征、承载力、延性、滞回曲线及耗能性能等抗震指标,研究预制桩身与承台连接节点对整个组合体试件抗震性能的影响。研究结果表明:在桩身内安放钢筋笼并深入承台的锚固钢筋无论是直放还是弯折均可明显改善管桩-承台组合体试件的整体性,提高组合体试件节点的承载能力、延性、耗能能力,改善组合体试件节点的变形能力,且后者提高的效果优于前者;通过连接板焊接的锚固钢筋试件的承载能力、变形能力、耗能能力较好,且锚固钢筋弯折的节点承载能力、抗震性能优于直放试件。To research the seismic behavior of PHC, 5 combination nodes of prefabricated pile with pile caps of post-pouring are tested under low cycle reciprocating quasi static loading, the failure characteristics, bearing capacity, ductility, hysteresis curves and energy dissipation are analyzed, and the influence of connection nodes on the seismic performance of the whole assembly specimens is studied. The results show that the specimens with the pile body which is put the anchor reinforcement of reinforcing cage and pile caps all can obviously improve pile cap assembly of the integrity of the specimen and improve assembly specimen node of the bearing capacity, ductility, energy dissipation capacity and combination node specimen deformation ability whether it＇s vertical or oblique, and the improvement of the latter is better than the former; through connecting plate welding of anchor steel, the bearing capacity, deformation capacity and energy dissipation ability of the specimen are good, and the bearing capacity and seismic performance of the node of the oblique anchoring reinforced are better than that of the vertical specimens.

关 键 词：PHC管桩 承载力 延性 滞回曲线 耗能能力 

分 类 号：TU753.3[建筑科学—建筑技术科学]