型钢混凝土异形柱的受剪机理及承载力影响因素分析  

Analysis on the mechanism and shearing capacity influence factors of steel reinforced concrete special-shaped columns

作　　者：陈宗平[1] 薛建阳[2] 赵鸿铁[2] 

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2008年第4期450-456,共7页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50478044);广西科学基金资助项目(桂科青0832004);陕西省教育厅专项科研计划项目(07jk301);广西大学科研基金资助项目(X071042)

摘　　要：为了揭示型钢混凝土(SRC)异形柱的受剪机理,进行了17个试件的低周反复荷载试验,试验表明:SRC异形柱的破坏形态有剪切斜压、剪切粘结、剪弯型和弯曲破坏;试验实测的荷载—应变滞回曲线反映了试件在发生剪切斜压破坏时型钢及箍筋屈服,而发生剪切粘结、剪弯型和弯曲破坏时,型钢及箍筋尚未屈服.同时也对异形柱中翼缘、截面的配钢形式、荷载加载方向、剪跨比以及轴压比等因素对SRC异形柱受剪性能的影响进行了分析;结果表明:翼缘的存在能提高异形柱的抗剪承载能力,提高的程度与截面形式和荷载作用方向等因素有关;实腹配钢试件的抗剪承载能力大于空腹配钢试件;SRC异形柱的抗剪承载力随着轴压比的增大而增大,但随着剪跨比的增大反而减小.In order to reveal the shearing mechanism of steel reinforced concrete（SRC） special-shaped columns, 17 specimens of SRC special-shaped columns under reversed cyclic loading were accomplished and the experimental research show that 4 types failure can be seen from the test specimens, shear compression failure, shear-bond failure, shear-bending failure and bending failure. Through the load-strain curve, the following phenomena can be found： steel and stirrup yield in shear compression failure, but the other types failure, steel and stirrup not yield. The influence of section flange, steel shape, loading angle, shear span ratio and axial compress ratio on shear capacity are researched. It is shown that section flange can enhance the bear capacity and the enhancing coefficient is in correlation with the section type and loading direction. Solid steel specimens shearing capacity is larger than the truss steel specimens. As axial compression ratio increases, shear capacity enhance, yet, with shear span ratio increases, shear strength decreases.

关 键 词：型钢混凝土(SRC) 异形柱 受剪机理 抗剪承载力 

分 类 号：TU398[建筑科学—结构工程] TU375