型钢高强混凝土短柱的抗剪机理与抗剪承载力  

SHEAR RESISTANCE MECHANISM AND SHEAR STRENGTH OF STEEL REINFORCED HIGH-STRENGTH CONCRETE SHORT COLUMNS

作　　者：李俊华[1] 王新堂[1] 薛建阳[2] 赵鸿铁[2] 

机构地区：[1]宁波大学建筑工程与环境学院 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《工程力学》2008年第4期191-199,共9页Engineering Mechanics

基　　金：国家自然科学基金项目(50478044);宁波市自然科学基金项目(2006A610096)

摘　　要：通过若干个型钢高强混凝土短柱的低周反复加载试验,对轴力和水平剪力共同作用下型钢高强混凝土短柱的受力性能进行了研究。由粘贴在箍筋和型钢表面的应变片和应变花,测到了柱中箍筋的应力-应变、型钢的剪应力-剪应变在不同受荷阶段的发展变化状况,分析了箍筋、型钢腹板以及混凝土在构件中的抗剪作用以及轴力在型钢与混凝土之间的分配关系,揭示了型钢高强混凝土短柱的抗剪机理,提出了型钢高强混凝土短柱不同破坏形态下的抗剪承载力计算公式,公式的计算结果与试验结果符合较好。The performance of steel reinforced high-strength concrete short columns is investigated by reversed cyclic horizontal load testing of several specimens under constant axial load. According to the measured stains of stirrups and steel, this paper analyzes the contributions of stirrups, steel web and concrete to shear capacity and contributions of steel and concrete to resist axial loads. Moreover, the mechanism of steel reinforced high-strengtk concrete short columns to resist shear force is investigated, and the formula to calculate its shear strength in both diagonal compression failure mode and bond failure mode are presented, Comparison shows that calculation results agree well with test results.

关 键 词：型钢混凝土 高强混凝土 短柱 抗剪机理 抗剪承载力 

分 类 号：TU375.3[建筑科学—结构工程] TU394