全装配式RC楼盖平面内受力性能试验研究  

Experimental study on in-plane mechanical behavior of untopped precast RC diaphragm

作　　者：庞瑞[1] 许清风 梁书亭[3] 朱筱俊[4] 武川川[5] 

机构地区：[1]河南工业大学土木建筑学院,河南郑州450001 [2]上海市建筑科学研究院工程结构新技术重点实验室,上海200032 [3]东南大学混凝土与预应力混凝土结构教育部重点实验室,江苏南京210096 [4]东南大学建筑设计研究院,江苏南京210096 [5]苏州市建筑设计研究院,江苏苏州215021

出　　处：《建筑结构学报》2012年第10期67-74,共8页Journal of Building Structures

基　　金：国家自然科学基金项目(51208181);国家"十二五"科技支撑计划项目(2011BAJ10B08);河南工业大学高层次人才基金项目(2012BS008);江苏省"333高层次人才工程"项目(1105000207);上海市工程结构新技术重点实验室开放课题(2011-KF03)

摘　　要：为研究全预制装配式钢筋混凝土楼盖的平面内受力性能,对1/2缩尺的楼盖模型进行了楼盖平面内拟静力试验,对楼盖的裂缝分布、破坏形态、平面内变形特征、滞回曲线、位移延性、刚度退化和耗能能力等进行了研究,分析了楼盖模型各连接件在加载过程中的板缝剪力和轴力分布规律。结果表明:新型楼盖具有较大的平面内刚度和较好的整体性能,在加载过程中梁-板连接件和板缝连接件均表现出良好的传力性能;新型楼盖具有一定的延性,但耗能能力不理想,说明基于弹性楼盖的抗震设计方法是必要的;加载初期楼盖的变形呈弯曲型,加载中后期随着楼盖损伤的积累,板缝间相对位移增大,变形模式逐渐向剪切型发展;新型楼盖在平面内荷载作用下内力分布规律与简支梁相近,研究成果可为新型楼盖平面内受力性能的理论分析提供参考。An experimental program was conducted on the 1：2 scaled model of new-type precast RC diaphragm （NPD） to evaluate its in-plane mechanical behavior. Performance of the specimen was evaluated in terms of crack and failure mode, the pattern of in-plane deformation, hysteretic curves, ductility, stiffness degradation and energy dissipation capacity. The results show that the NPD has high in-plane stiffness and good integrity. The beam-to-slab connections and slab joints perform well during the test process. The ductility of the specimen is acceptable, while the energy dissipation is not that satisfactory, confirming that the elastic design method of precast RC diaphragms is rational. The in-plane deformation pattern will convert from bending shape to shearing type as the diaphragm enters nonlinear working stage and the displacements between adjacent slabs are enlarged. The shear and axial force distribution pattern of the specimen was analyzed. The results indicate that internal force distribution is similar to the simply supported beam, which can be used for theoretical analysis of NPD.

关 键 词：装配式楼盖 平面内受力性能 拟静力试验 延性 抗震设计 

分 类 号：TU375.2[建筑科学—结构工程] TU317.1