组合T形截面钢管混凝土构件抗剪性能试验研究  

EXPERIMENTAL STUDY ON SHEAR RESISTANCE PERFORMANCE OF COMPOSITE T-SECTION CONCRETE-FILLED STEEL TUBULAR MEMBERS

作　　者：徐礼华[1,2] 徐浩然[1] 杜国锋[3] 温芳[1] 

机构地区：[1]武汉大学土木建筑工程学院,武汉430072 [2]岩土与结构工程安全湖北省重点实验室,武汉430072 [3]长江大学城市建设学院,荆州434023

出　　处：《工程力学》2009年第12期142-149,共8页Engineering Mechanics

基　　金：湖北省建设科技计划项目(K200513)

摘　　要：为探讨组合T形截面钢管混凝土构件的抗剪性能和受剪承载力计算公式,完成了22个该类构件的静力加载试验。试件参数包括剪跨比、轴压比和套箍指标。试验结果表明:该类试件具有良好的变形能力;试件的破环形态随剪跨比λ的不同分为剪切破坏(λ=0.2、λ=0.25)、弯剪破坏(λ=0.5、λ=0.75)和弯曲破坏(λ=1.25)3种,且不受轴压力的影响;试件的抗剪承载力随轴压比和套箍指标的提高而增大,随剪跨比的提高而减小。推荐了该类构件的受剪承载力计算公式,可供工程设计参考。Twenty-two specimens were tested under static load in order to investigate the shear resistance performance of composite T-section concrete-filled steel tubular members, the calculation formula was proposed as well. The parameters of the specimen include shear-span ratio, axial-load ratio and confinement index. Test results demonstrate good deformation capacity of the specimens, and the failure modes are mainly shear failure （shear-span ratio λ = 0.2, λ = 0.25）, bending-shear failure （λ = 0.5, λ = 0.75） and bending failure （λ = 1.25）, which are not influenced by the axial compressive forces. The shear strength of the specimen increases with the increase of axial-load ratio or confinement index, and decreases as the shear-span ratio increases. The formula of the shear strength of composite T-section concrete-filled steel tubular members is developed and can be applied to real engineering projects.

关 键 词：钢管混凝土 抗剪性能 试验研究 组合T形截面 计算公式 

分 类 号：TU398.9[建筑科学—结构工程]