循环荷载作用下钢筋混凝土框格单元结构受力性能试验研究  

Experimental study on load-bearing performance of reinforced concrete fundamental frame structures under cyclic loading

作　　者：喻磊[1] 龚安礼[1] 姚谦峰[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《四川建筑科学研究》2007年第5期28-32,共5页Sichuan Building Science

基　　金：国家自然科学基金资助项目(50578011);陕西高校省级重点实验室重点科研资助项目(O2JS28)

摘　　要：为研究密肋复合墙板内钢筋混凝土框格单元结构的受力性能,对3个不同相对刚度比的框格单元及3个空框格结构进行1/2比例模型循环加载试验。分析了试件破坏发展过程,探讨了外围构件的影响。结果表明,钢筋混凝土框格单元结构破坏发展的先后次序与相对刚度有关。增加对填充砌体的侧向约束作用,结构的极限承载能力与变形能力均提高。随着压缩变形幅值增大,结构承载能力退化系数趋于减小。当填充砌体所受压应力水平高时,框格单元结构刚度退化较快。To investigate the load-bearing performance of the reinforced concrete fundamental frame structure in multi-ribbed walls, 1：2 ratio model experiments of three fundamental frame structures and three corresponding frames without inflU were conducted. The damage phenomena of the specimens are analyzed and the influences of the peripheral frame members on structural load-resisting capacity and deformation behavior are discussed. It is revealed that the damage sequence of the fundamental frame structures is related to the struc- tural relative stiffness. With the increase of the confinement arising from peripheral frame members, both the ultimate load-resisting ca- pacity and deformation behavior of the fundamental frame structures become better. Enhancing the compressive deformation amplitude, the load-resisting capacity degradation coefficient of the fundamental frame struetmre gets smaller. As the compressive stress loaded on the infrlled masonry is in a high level, the stiffness of the fundamental frame structure degrades rapidly.

关 键 词：钢筋混凝土 框格单元结构 相对刚度 刚度退化 承载能力退化 

分 类 号：TU375.03[建筑科学—结构工程]