混凝土柱后接梁接头抗剪承载力研究  

Study on Shear Capacity of Connections of Post-cast Beams Connected with Concrete Columns

作　　者：王俊杰[1] 李志国[1,2] 王存贵 王敏杰[1] 张磊[1] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津市土木工程结构及新材料重点实验室,天津300072 [3]中国建筑第六工程局有限公司,天津300451

出　　处：《建筑科学》2012年第1期33-36,共4页Building Science

摘　　要：通过对无齿直缝植抗剪筋、剔凿混凝土保护层植抗剪筋两种柱后接梁接头形式的试验研究,讨论后接梁柱界面的抗剪性能,以及抗剪筋对接头抗剪性能的影响。试验结果证实:这两种接头形式都具有较好的抗剪能力,其受剪承载力均可以达到整浇式的水平,且植入抗剪筋有利于提高后接梁柱界面的受剪承载力,无齿直缝接头形式梁柱界面相对滑移小于剔凿混凝土保护层的接头形式。本文讨论了此两种接头形式的抗剪性能及机理,并建立了受剪承载力的验算方法,所提建议公式与实验结果相吻合,可供工程设计参考。Based on the experiments on two kinds of beam-column joint,the roughened interface with inserting shear reinforcement and the rejected concrete cover with inserting shear reinforcement,the shear performance of the interface of post-cast beams,and the effects of shear reinforcement on the shear performance of connections are discussed.It was showed that the both connections had good performance,their shear capability was up to the level of integral casting beams,and the shear reinforcement could improve the shear capacity of the interface between the post-cast beam and the column.The relative slippage between the post-cast beam and the column in the roughened interface joint was less than in the rejected concrete cover joint.This paper discusses the shear performance and the mechanism of two joint forms,and sets up the calculation methods of the shear capacity,the proposal formulas agree with the results of the experiments well,so they could be used as a reference for the engineering design.

关 键 词：柱后接梁 新老混凝土界面 抗剪筋 受剪承载力 

分 类 号：TU375.2[建筑科学—结构工程] TU317