| 考虑抗弯钢筋影响的混凝土板冲切承载力计算 |
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| 引用本文： | 田文秀,赵均海,魏雪英,黄亚娟.考虑抗弯钢筋影响的混凝土板冲切承载力计算[J].强度与环境,2007,34(5):36-41. |
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| 作者姓名： | 田文秀 赵均海 魏雪英 黄亚娟 |
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| 作者单位： | 长安大学建筑工程学院,西安,710061 |
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| 基金项目： | 高等学校博士学科点专项科研项目;陕西省自然科学基金 |
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| 摘 要： | 本文采用刚塑性模型和空间问题平面化的合理假定,将复杂的钢筋混凝土板的冲切问题简单化,给出了在竖向荷载作用下无抗冲切钢筋的混凝土板的冲切破坏机构和承载力示意图,认为其承载力由混凝土部分和钢筋部分共同承担。然后采用双剪应力三参数破坏准则,利用虚功原理求得混凝土部分的抗冲切承载力,并综合考虑了抗弯纵筋的销栓作用,推导出钢筋混凝土板的冲切承载力计算公式。公式形式简洁,计算结果与试验结果吻合较好。
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| 关 键 词： | 混凝土板 冲切承载力 双剪应力三参数准则 销栓 |
| 文章编号： | 1006-3919（2007）05-0036-06 |
| 修稿时间： | 2007-06-18 |
The punching strength of reinforced concrete slabs consideration in the action of reinforced bars |
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| TIAN Wen-xiu,ZHAO Jun-hai,WEI Xue-ying,HUANG Ya-juan.The punching strength of reinforced concrete slabs consideration in the action of reinforced bars[J].Structure & Environment Engineering,2007,34(5):36-41. |
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| Authors: | TIAN Wen-xiu ZHAO Jun-hai WEI Xue-ying HUANG Ya-juan |
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| Abstract: | In this paper,the punching strength of reinforced concrete is assumed to be contributed by concrete part and the reinforced bars part.The problem is simplified according to the rigid model and plane hypothesis.Then the upper bound of ultimate punching strength of concrete part is obtained by using three parameters criterion of the twin shear strength theory and the virtual work equation.Then taking account of the dowel action of the reinforced bars,the formula of punching strength of concrete slabs is derived.The comparison between the theoretical values and the testing results show good agreement. |
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| Keywords: | concrete slab punching shear capacity twin-shear stress three-parameter strength criterion dowel |
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