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当混凝土板受到平面内的侧向约束时,由于压缩薄膜效应(CompressiveMembrane Action—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。
When the concrete slab is restrained laterally in the plane, the ultimate bearing capacity and working performance of the slab will be significantly improved due to the Compressive Membrane Action-CMA. In order to correctly understand the performance of fiber reinforced material (FRP) reinforced concrete bridge deck structure, a group of glass fiber reinforced concrete slab with lateral constraint was established to analyze the effect of compression film on the surface of the non-metallic reinforced concrete Effect of structure. The experimental results show that the performance of GFRP tendons is mainly affected by lateral restraint stiffness and concrete strength, while the effect of reinforcement ratio is not obvious. The current design code (ACI440R-06) seriously underestimates the load carrying capacity of GFRP tendon concrete slab due to its lack of consideration of the effect of compressive film. Therefore, based on the previous research on reinforced concrete bridge panels, a set of computational models of panel bearing capacity of GFRP reinforced concrete bridges considering the effect of in-plate compressive film are established. By comparing with several test results, it is found that the theoretical algorithm is in good agreement with the test results.