带腋撑钢筋混凝土框架结构的力学性能  

Mechanical Behavior of Reinforced Concrete Frame Structure with Diagonal Members

作　　者：蔡健[1] 周飞[2] 苏广群[2] 王里佳 左志亮[2] 

机构地区：[1]华南理工大学亚热带建筑科学国家重点实验室,广东广州510640 [2]华南理工大学土木与交通学院,广东广州510640 [3]广东省高教建筑规划设计院,广东广州510631

出　　处：《华南理工大学学报（自然科学版）》2009年第9期7-12,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：科技部重大基础研究前期研究专项(2004CCA03300)

摘　　要：提出了一种新型的带腋撑钢筋混凝土框架结构,研究了该新型框架结构在竖向荷载和水平荷载下的力学性能.和常规的钢筋混凝土框架结构相比,该新型结构的设计控制截面的位置位于梁腋撑处、柱腋撑处以及框架柱底,框架梁端、框架柱端的弯矩、剪力大幅度减小.大尺寸新型框架结构的加载试验和非线性有限元分析结果表明:在荷载作用下,该新型结构的塑性铰首先出现在梁腋撑处,然后才在梁跨中出现,梁端、柱端及节点区受力性能良好,合理的设计可以保证结构具有良好的承载能力和变形能力.A new kind of reinforced concrete（RC） frame structure with diagonal members is put forward,and the mechanical behavior of the new structure under vertical and horizontal loads is analyzed and compared with that of the conventional RC frame structure.The results indicate that the principal design sections of the new frame structure are located at the beam-diagonal member joint,the column-diagonal member joint and the column bottom,and that both the bending moments and the shearing forces of the new structure at the ends of beam and column greatly reduce. Moreover, the loading experiments and nonlinear finite element analysis of the large-size new structure shows that, in loading conditions, the plastic hinge appears first at the beam-diagonal member joint, then at the middle of the beam, that the ends of beam and column as well as the beam-column joint, all exhibit good mechanical behaviors, and that a reasonable design may provide the structure with good bearing and deformation capacities.

关 键 词：框架 腋撑 力学性能 有限元分析 

分 类 号：TU375.4[建筑科学—结构工程]