钢-GFRP-混凝土组合梁受弯性能试验

发布时间：2018-04-16 06:35

本文选题：桥梁工程 + 组合梁　；参考：《中国公路学报》2016年09期

【摘要】：为研究钢与GFRP-混凝土空心组合板通过不同连接方式形成组合梁的受弯性能,对3根组合梁试件进行了静载试验研究。3个试件中钢梁与GFRP-混凝土组合板间的连接方式分别为环氧树脂胶结及栓钉连接。通过比较不同连接方式下组合梁截面应变、跨中挠度、界面相对滑移的变化规律,验证了环氧树脂胶层及抗剪栓钉分别作为组合梁界面连接件的可行性。基于不同连接方式下组合梁的破坏模式,给出了栓钉连接方式下组合梁抗弯承载力的简化计算方法。研究结果表明:环氧树脂胶结组合梁的破坏模式为剪弯段GFRP板沿纵向剪切破坏,栓钉连接组合梁的破坏模式为典型的弯曲破坏;栓钉连接件较环氧树脂胶层表现出更高的界面剪切刚度;栓钉连接组合梁的抗弯承载力约为环氧树脂胶结组合梁承载力的2倍。
[Abstract]:In order to study the flexural behavior of composite beams formed by steel and GFRP- concrete hollow composite slabs through different connection modes,The static load test of three composite beams was carried out, in which the connection between steel beams and GFRP- concrete composite plates was made by epoxy resin bonding and pin bonding respectively.By comparing the variation of cross section strain, mid-span deflection and relative slip of interface between composite beams under different connection modes, the feasibility of epoxy resin adhesive layer and shear bolt nail as interface connectors of composite beam is verified.Based on the failure modes of composite beams under different connection modes, a simplified calculation method of flexural bearing capacity of composite beams with bolt connections is presented.The results show that the failure mode of epoxy resin bonded composite beam is shear failure along longitudinal shear of GFRP plate in shear bending section, while the failure mode of bolted composite beam is typical bending failure.The interfacial shear stiffness of the bolt joint is higher than that of the epoxy resin adhesive layer, and the flexural capacity of the bolted composite beam is about 2 times of that of the epoxy resin bonded composite beam.
【作者单位】：东南大学交通学院;香港理工大学土木与环境工程系;
【基金】：国家自然科学基金项目(51278441,51578135) 中央高校基本科研业务费专项资金项目(KYLX15_0142)
【分类号】：TU398.9

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