钢筋混凝土不等肢异形柱抗剪承载力研究  

SHEAR RESISTANCE STUDY ON SPECIALLY SHAPED RC COLUMNS WITH DIFFERENT LIMB LENGTHS

作　　者：黄承逵[1] 曲福来[1,2] 徐士弢[3] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]华北水利水电学院,河南郑州450011 [3]沈阳市建筑设计院,辽宁沈阳110005

出　　处：《工程力学》2009年第5期197-201,共5页Engineering Mechanics

摘　　要：根据9根钢筋混凝土不等肢异形柱在低周反复荷载作用下抗剪性能试验研究,分析了翼缘尺寸对异形柱抗剪承载力的影响。采用桁架-拱模型理论对异形柱的受力进行了分析。结果表明:异形柱的剪力分别由桁架机构和拱机构承担,由于翼缘部分参与抗剪作用,可以提高异形柱的抗剪承载力。基于桁架-拱模型,推导出考虑翼缘影响的异形柱抗剪承载力计算公式,通过与试验数据的比较发现,两者吻合较好。Nine specially shaped reinforced concrete （RC） columns with different limb lengths were tested under low reversed cyclic loadings. The influence of the flange on the shear resistance of specially shaped RC columns was studied. The truss-arch model is also used to study the stress of specially shaped columns at their ultimate shear limit state. The results show that the shear resistance is composed of two parts contributed by a truss model and an arch model, and the flange can promote the shear bearing capacity of specially shaped columns for it participates in the truss-arch action. At last, a formula based on the truss-arch model is presented to calculate the shear resistance of specially shaped RC columns by considering the flange. The calculated values are in good agreement with the experimental results.

关 键 词：混凝土异形柱 翼缘 柱肢 抗剪承载力 桁架-拱模型 

分 类 号：TU375.3[建筑科学—结构工程]