| 基于双剪强度理论的混凝土板极限冲切承载力计算方法 |
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| 引用本文： | 蔡健,林凡.基于双剪强度理论的混凝土板极限冲切承载力计算方法[J].工程力学,2006,23(6):110-113,93. |
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| 作者姓名： | 蔡健 林凡 |
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| 作者单位： | 1. 华南理工大学土木工程系,广州,510640
2. 华南理工大学建筑设计研究院,广州,510640 |
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| 摘 要： | 将混凝土板的冲切破坏简化为平面应变问题,采用双剪应力三参数强度准则对冲切破坏时的混凝土板剪压区的复合应力进行分析,得到了剪压面上的极限竖向剪应力,利用静力平衡条件求得混凝土板的极限冲切承载力计算公式。与国内外246个试件的试验数据进行比较表明,该公式的计算结果与试验结果吻合良好。计算公式的计算模式概念清晰,可供结构设计时参考。
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| 关 键 词： | 混凝土板 极限冲切承载力 双剪应力三参数强度准则 复合应力 冲切破坏 |
| 文章编号： | 1000-4750（2006）05-0110-04 |
| 收稿时间： | 2004-07-20 |
| 修稿时间： | 2004-07-202004-12-18 |
ULTIMATE PUNCHING SHEAR STRENGTH FOR CONCRETE SLABS BASED ON TWIN-SHEAR STRENGTH THEORY |
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| CAI Jian,LIN Fan.ULTIMATE PUNCHING SHEAR STRENGTH FOR CONCRETE SLABS BASED ON TWIN-SHEAR STRENGTH THEORY[J].Engineering Mechanics,2006,23(6):110-113,93. |
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| Authors: | CAI Jian LIN Fan |
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| Affiliation: | 1. Dept. of Civil Engineering, South China Univ. of Tech., Guangzhou 510640, China; 2. Architecture Design and Research Institute South China Univ. of Tech., Guangzhou 510640, China |
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| Abstract: | The punching failure of concrete slabs is simplified as a problem of plane strain. The combined stresses on the shear-compression zone of concrete slabs at the momemnt of punching failure are analyzed by the twin-shear stress three-parameter strength criterion, and the ultimate vertical shear stress on the shear-compression plane is obtained. By means of equilibrium conditions, a formula of ultimate punching shear strength of concrete slabs is derived. The calculated results are in good agreement with the experimental results of 246 specimens in domestic and foreign literature. The analytic method is clear in physical conception, and the theoretical expressions can be used as reference in structural design. |
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| Keywords: | concrete slab ultimate punching shear strength twin-shear stress three-parameter strength criterion combined stress punching failure |
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