全装配式钢筋混凝土框架-剪力墙结构抗震性能试验研究  

Experimental study on seismic behavior of wholly precast RC frame-shear wall structure

作　　者：马军卫[1] 潘金龙[1] 尹万云 刘守城 蒋苏童 

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096 [2]中国十七冶集团有限公司,安徽马鞍山243000

出　　处：《建筑结构学报》2017年第6期12-22,共11页Journal of Building Structures

基　　金：国家自然科学基金项目(51278118);中国中冶"三五"重大科技专项(中冶科[2013]1号)

摘　　要：为研究采用预制剪力墙、预制框架的全装配式RC框架-剪力墙结构的抗震性能,对2榀1/2比例两层两跨RC框架-剪力墙结构子结构模型试件(其中1榀为全装配试件PCFW2,1榀为全现浇对比试件RCFW)进行了低周反复荷载试验,分析了结构的破坏机制、破坏形态、塑性铰开展、滞回性能、位移延性、刚度退化和耗能能力等。结果表明:全装配式试件PCFW2与全现浇对比试件RCFW的开裂荷载相当,破坏过程和最终破坏形态基本相同;灌浆套筒、约束浆锚可有效传递钢筋应力;全装配式试件PCFW2整体性良好,其屈服荷载、峰值荷载、极限荷载均略大于全现浇对比试件RCFW的相应值,但相差不超过13.0%,位移延性系数较全现浇试件RCFW的略低。在大部分受力阶段,试件PCFW2耗能优于试件RCFW。建议全装配式框架-剪力墙结构中剪力墙的边柱(或边缘)纵筋,采用灌浆套筒连接,其余部分采用约束浆锚搭接连接,而框架湿节点处的后浇混凝土采用微膨胀混凝土。Two geometrically identical half-scale RC shear wall-frame structure specimens were constructed and tested under quasi-static reversed cyclic lateral loading to study the seismic behaviors of the RC shear-wall frame structure, such as its failure mechanism, failure mode, plastic hinge development, hysteretic response, displacement ductility, stiffness degradation and energy dissipation capacities. One unit was a conventionally cast-in-situ concrete shear wall- frame structure specimen named RCFW, and the other unit was a precast one named PCFW2 erected with fabricated shear wails and frame components. The test results show that specimen PCFW2 has approximately equal cracking load, similar failure process and final failure mode to specimen RCFW. Two kinds of rebar connecting methods, rebar splicing by grout sleeve and rebar lapping in grout-filled hole, can transfer the rebar stress effectively. Specimen PCFW2 shows good integrity. The seismic characteristic values such as yield load, peak load, and ultimate load of specimen PCFW2 are less than those of RCFW, where the difference is approximately 13.0%. The displacement ductility coefficient of specimen PCFW2 is also less than that of RCFW. The test results also show that the energy dissipation capacity of PCFW2 is greater than that of RCFW at the most loading stage during the whole loading process. The edge columns of the shear walls in the wholly precast RC frame-shear wall structure is proposed to be connected with rebar splicing by grout sleeves, and the rest part of the shear wails with rebar lapping in grout-filled holes. Micro- expansive concrete is proposed to be used in the wet joints of the frame parts as cast-in-place concrete.

关 键 词：全装配式RC框架-剪力墙结构 低周反复加载试验 滞回性能 位移延性 刚度退化 能量耗散 

分 类 号：TU398.2[建筑科学—结构工程] TU317.1