| 薛伟辰,郑乔文,杨雨.纤维塑料筋混凝土梁挠度的计算方法[J].水利学报,2008,39(7): |
| 纤维塑料筋混凝土梁挠度的计算方法 |
| Calculation method for deflection of concrete beams reinforced with FRP rebars |
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| DOI： |
| 中文关键词: 纤维塑料筋 混凝土梁 挠度 内力臂长度系数 设计建议 |
| 英文关键词: FRP rebar concrete beam deflection arm of force coefficient design recommendation |
| 基金项目: |
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| 摘要点击次数: 2531 |
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| 中文摘要: |
| 本文基于本课题组与国外已有试验研究，根据纤维塑料筋混凝土梁的非线性有限元分析与试验结果的验证，对纤维塑料筋混凝土梁挠度的计算方法进行了较系统的研究。研究表明，纤维塑料筋混凝土梁的刚度随配筋率和混凝土强度的提高而增大；当纤维塑料筋混凝土梁发生受拉破坏时，增加配筋率可提高其极限变形能力，而当发生受压破坏时，极限变形能力与配筋率成反比；纤维塑料筋混凝土梁开裂截面内力臂长度系数可取为0.94。在此基础上，提出了纤维塑料筋混凝土梁挠度的设计建议。按本文建议公式计算的纤维塑料筋混凝土梁挠度值与试验结果吻合良好。 |
| 英文摘要: |
| Based on the nonlinear FEM analysis and experiment verification, the calculation method for deflection of concrete beams reinforced with FRP (Fiber Reinforced Polymer)rebars is studied. It is found that the stiffness of beams increases with the increase of reinforcement ratio and elevation of concrete strength. The increase of reinforcement ratio can elevate the ultimate deformation capacity when the tensile failure of the beam occurred. Whereas, the ultimate deformation capacity is inversely proportion to the reinforcement ratio as the compressive failure happened. The arm of force coefficient of FRP reinforced concrete beams is proposed to be equal to 094 and the formulas for calculating deflection are deduced. The calculated deflections are in good agreement with the experimental results. |
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