摘要
从过去的试验数据和数值模拟分析可以看出,无梁楼盖在板柱节点处的破坏形态通常表现为冲切破坏。基于其破坏形式的分析,该结构类型的冲切承载力可分为弯切承载力和剪切承载力。承载力的类型取决于结构的混凝土强度和配筋率。计算无梁楼盖在板柱节点处的承载力的常规方法是采用单独的板柱节点,但由于压缩薄膜效应的存在,实际的承载力比常规方法计算的值要大。为了准确计算该处的极限冲切承载力,本文建立了基于压缩薄膜效应的计算模型。通过与多组试验模型对比发现,该模型的计算结果与试验结果吻合良好,可供结构设计使用。
Experimental and numerical inverstigations of slab-column connections in flat slabs showed that the observed failure modes were punching failue.Based on the analysis of failure modes,the ultmate capacities of this structural components could be classified broadly as either flexural or shear punching capacities.The type of punching capacities depended on the concrete strength and reinforcement percentage.Due to the exsistence of compressive membrane action,the real punching strength of the slab-column connections in the full panel flat slab structures was considerably greater than that of the convetional cacluated one.In the proposed prediction method,this structural phenomenon was considered.The predicting results from the proposed method showed a good correlation with several test results.The theoretical expressions could be used in practical structural design.
出处
《东莞理工学院学报》
2010年第5期99-106,共8页
Journal of Dongguan University of Technology
基金
东莞市科技计划(200910824000256)
教育部留学人员科研启动基金
广东省交通厅科技计划(2009-02-17)
关键词
无梁楼盖
板柱节点
冲切承载力
压缩薄膜效应
flat slab
slab-column connection
ultimate punching strength
compressive membrane action
