用双剪强度理论解混凝土板冲切的轴对称问题
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摘要
本文采用双剪强度理论,对混凝土板轴对称冲切破坏强度进行了计算。采用刚塑性模型,给出轴对称破坏机构,得到极限应力圆的包络线为二条直线,再利用虚功方程求得破坏荷载的上限。公式形式简单,与已有结果相比符合很好。
in this paper, the axisymmetrical ultimate punching Strength of concrete slabs is obtained by using the twin shear strength theory. Rigid-plastic model has been adopted, an axisymmetrical failure mechanism given, the envelope of failure Mohr circles is found to be two straight lines. Then,the upper-bound of ultimate punching load is obtained by the virtual work equation. The numerical results are shown to be satisfactory compared with known results.
引文
1MPNielson.LimitAnalysisandConcretePlasticity.Prentice-Hallfor,EnglewoodCliffs,19842Da-HuaJiangandJing-HuaShen.StrengthofConcreteSlabsinPunchingShear,ASCEJournalofStructuralEngineering,1986;112(12):2578-25913郑作樵,欧阳成生.钢筋混凝土圆板的冲切强度.建筑结构学报,1985;(6):14-224曹声远,李四,蒋大骅,沈景华,郑作樵.关于“钢筋混凝上圆板的冲切强度”一文的讨论.建筑结构学报,1986;(6):75-78,725俞茂宏.强度理论新体系.西安:西安交通大学出版社,19926俞茂宏,曾文兵.工程结构分析新理论及其应用.工程力学,1994;11(1):9-207施岚青,张玉祥.混凝土结构设计规范学习指导.地震出版社,1991

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