混凝土T形边柱的板柱连接抗震性能试验研究  

Seismic response of edge slab-column connection with T-shaped column

作　　者：刘文珽[1] 黄承逵[2] 姚谦峰[3] 

机构地区：[1]中国建筑设计研究院,北京100044 [2]大连理工大学海岸与近海工程国家重点实验室,辽宁大连116024 [3]北京交通大学土木建筑工程学院,北京100044

出　　处：《建筑结构学报》2009年第2期47-54,共8页Journal of Building Structures

摘　　要：通过2个大比例T形边柱的板柱连接试件(其中1个试件配置抗冲切锚栓)在竖向荷载和低周反复水平荷载作用下的试验,探讨了T形边柱的板柱连接在模拟地震作用下的裂缝形态、破坏特征、混凝土以及钢筋的应变、滞回特性、位移延性等一系列受力特性。试验研究表明,T形边柱的板柱连接与传统方形边柱的板柱连接除破坏形态有所差异外,其受力性能基本类似,2个试件的极限侧移比都远超过了1.5%的侧移比限值要求,因此在板柱结构中引入T形边柱是可行的;配置抗冲切锚栓可以显著地提高T形边柱的板柱连接的承载能力和延性。此外,根据试验给出了T形边柱的冲切临界面形式,并提出了其类似极惯性矩的计算公式,从而使T形边柱的板柱连接可以应用现行规范的方法进行承载力分析计算,采用该方法的理论分析结果与试验结果符合较好。Two large-scale edge slab-column connections with T-shaped columns were tested under combined gravity and cyclic lateral loads, in order to study cracking behavior, failure mode, concrete strain, steel strain, as well as the seismic behavior of hysteresis loops and displacement ductility. The two specimens were identical except one contained shear-stud reinforcement. Test results revealed that the seismic behavior of edge slab-column connection with T-shaped column is similar to that of conventional edge slab-column connection with square column except there are some differences in the punching shear behavior between them, the ultimate drift ratios of the two specimens are all well above 1.5 %, indicating that it is feasible to use T-shaped column in fiat slab structures. The results also confirmed the effectiveness of shear-stud reinforcement in increasing the shear strength and ductility of this kind of connection. The critical section of punching shear for edge T-shaped column and the equation for the analogous to polar moment of inertia are suggested, thus the code procedure can be used to analyse the slab-column connection with T-shaped column, which is justified by results of tests.

关 键 词：T形柱 板柱连接 锚栓 拟静力试验 抗震性能 

分 类 号：TU398.1[建筑科学—结构工程] TU317.1