带底部后浇区的装配式剪力墙水平拼缝性能试验及有限元分析  

Experimental Study and FEM Analysis on Horizontal Joint Behavior of Monolithic Precast Concrete Shear Wall with After-pouring Part

作　　者：李国强[1] 黄小坤[1] 李然[1] 李刚[1] 刘瑄 李哲龙 

机构地区：[1]中国建筑科学研究院,北京100013 [2]中国二十二冶集团有限公司,河北唐山063000

出　　处：《建筑科学》2014年第5期45-51,共7页Building Science

摘　　要：针对一种在剪力墙底部预留后浇区、后浇区内竖向分布钢筋搭接连接的新型装配整体式剪力墙,进行一批剪力墙试件的水平低周往复加载试验,研究其水平拼缝的抗震性能。选取剪跨比分别为1.03、1.25和1.60的3组9个带底部预留后浇区的试件进行试验和有限元分析,研究预制试件拼缝截面的剪力分布及临近的钢筋应力分布。研究结果表明:预留后浇区形成的水平和竖向拼缝对该新型装配整体式剪力墙的裂缝开展规律及破坏形态无明显影响,宏观力学性能指标与现浇试件基本相同;有限元分析再现了混凝土和钢筋剪力传递的变化过程和分布模式,分析结果与试验结果吻合较好。通过研究提出了装配整体式剪力墙底部预留后浇区的高度、宽度要求以及相应的构造措施。To study the seismic behaviors of horizontal joint of a new type of monolithic precast concrete shear wall with a small reserved after-pouring part at the bottom,quasi-static loading tests of specimens of this kind of shear walls are performed. 9 shear wall specimens of three groups,with the shear span ratio of 1. 03,1. 25 and 1. 60 respectively,are tested and analyzed using FEM to study the shear force distribution of the joint surface and the stress distribution of the nearest horizontal steel bars. The test results indicate that the horizontal and vertical joints have little effects on the cracking rules and failure modes of the new type monolithic shear wall,and the macro mechanical performances are basically the same as cast-in-place shear wall specimens. The FEM analysis reproduces the shear transfer procedure and distribution between concrete and steel bars,and illustrates that the results are consistent well with the model test. The width and height requirements of the reserved after-pouring part and the structural measures are discussed at last.

关 键 词：预制剪力墙 装配整体式剪力墙 后浇区 剪力分布 

分 类 号：TU973.16[建筑科学—结构工程]