交通荷载作用下压缩薄膜效应对GFRP筋混凝土桥梁面板工作性能的影响分析

Influence Analysis of Compressive Membrane Action on Serviceability of GFRP Reinforced Concrete Bridge Deck Slabs Under Transportation Loads

为了研究采用玻璃纤维增强筋作为配筋材料的混凝土桥梁面板的工作性能,结合板内的压缩薄膜效应对该结构类型在交通荷载作用下的工作性能进行了非线性有限元分析。通过对已建的GFRP筋混凝土桥梁结构、现行GFRP筋桥梁面板设计规范和数值模拟结果的比较分析,可以发现由于压缩薄膜效应的作用,实际的桥梁面板中所需的配筋率要远低于规范的计算结果。基于所建立的非线性有限元模型与试验结果有着良好的吻合,对结合了压缩薄膜效应进行设计的GFRP筋混凝土桥梁结构的工作性能进行了分析。分析结果表明,该非金属桥梁结构在交通荷载作用下有着良好的工作性能。

In the investigation of structural behaviours of concrete bridge deck slabs reinforced with Glass Fiber-Polymer Bars（GFRP Bars）under transportation loads,nonlinear finite element analysis（NLFEA）on this structural type are carried out with consideration of compressive membrane action（CMA）.In the study on existing GFRP reinforced concrete bridge deck slabs,current design standard and numerical results,it is found that the real required reinforcement percentage is lower than that predicted by design methods.Based on the good correlation between NLFEA and experimental tests,the serviceability of a GFRP reinforced concrete bridge deck slabs with consideration of CMA is investigated.The good structural behaviours are observed in the analysis of this non-metallic bridges under transportation loads.