异形柱框架结构顶层边节点受剪承载力分析  

Analysis on Shearing Strength of R .C. Special-Shaped Column Frame's Exterior Joints on Top Floor

作　　者：桂国庆[1] 熊黎黎[1] 熊进刚[1] 

机构地区：[1]南昌大学土木工程学院,江西南昌330029

出　　处：《南昌大学学报（工科版）》2002年第4期12-14,18,共4页Journal of Nanchang University(Engineering & Technology)

摘　　要：分析了钢筋混凝土异形柱框架结构顶层边节点在负弯矩作用下的受剪特征、传力模型和破坏机理,采用斜压杆机理得出了框架节点的受剪承载力计算公式,并用本文提出的公式计算节点受剪承载力,其计算值和试验结果相比较,符合良好.最后,强调为防止节点斜压破坏及主弯弧下混凝土局压破坏,还应控制负弯矩筋的配筋率和保证负弯矩筋的相对弯弧半径不应过小.The paper analyses shearing characteristic and mechanism of R.C special -shaped column frame's exterior joint on top floor under negative moment .By using the theory of strut-tie, a formula to calculate the shear capacity of the joint is put forward .It is found that the theoretical calculation agreed well with the test results.At the end of the paper, it is pointed out that the rate of the steel under negative moment should be controlled and the relative arc radius should not be too small, in order to prevent inclined compress of this kind of the joints and crack partly of the concrete below the main arc.

关 键 词：异形柱框架结构 边节点 斜压杆机理 受剪承载力 钢筋混凝土结构 

分 类 号：TU375.4[建筑科学—结构工程]