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工程力学  2014 

侧向约束GFRP筋混凝土板内压缩薄膜效应的研究

DOI: doi:10.6052/j.issn.1000-4750.2013.01.0036, PP. 203-211

Keywords: 压缩薄膜效应,试验研究,GFRP筋混凝土桥面板,承载力,理论算法

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Abstract:

当混凝土板受到平面内的侧向约束时,由于压缩薄膜效应(CompressiveMembraneAction—CMA)的存在,板的极限承载力和工作性能将显著提高.为了正确认识纤维增强材料(FRP)筋混凝土桥面结构的工作性能,建立了一组带有横向约束的玻璃纤维增强筋材混凝土板带来分析板内压缩薄膜效应对这一非金属筋材混凝土结构的影响.试验中发现GFRP筋混凝土板带的工作性能主要受到横向约束刚度和混凝土强度的影响,而配筋率的影响却不明显.现行的设计规范(ACI440R-06)由于没有考虑板内压缩薄膜效应的作用严重低估了GFRP筋混凝土板带的承载能力.因此基于过去对钢筋混凝土桥梁面板的研究,建立了一套考虑板内压缩薄膜效应的GFRP筋混凝土桥梁面板承载力计算模型.通过与多个试验结果进行对比后发现,该理论算法与试验结果有着良好的吻合.

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