钢板-混凝土组合连梁抗震性能有限元分析

发布时间：2018-05-30 18:54

本文选题：钢板-混凝土组合连梁 + 小跨高比　；参考：《西安建筑科技大学学报(自然科学版)》2014年05期

【摘要】：采用有限元软件对钢板-混凝土组合(PRC)连梁抗震性能进行了数值模拟,通过与试验结果的对比,验证了模型的正确性.通过大量的数值模拟,研究了跨高比、钢板锚固长度、钢板厚度、纵筋配筋率和墙肢配筋率等参数对钢板-混凝土组合连梁抗震性能的影响.结果表明:采用混凝土应力-断裂能关系来考虑混凝土受拉软化性能,能较好的进行钢板-混凝土组合连梁的弹塑性有限元分析;跨高比的变化对其屈服荷载和峰值荷载影响显著,随着跨高比的增大,连梁的屈服荷载和峰值荷载逐渐减小,但其延性性能逐渐提高;连梁的承载力和刚度随钢板锚固长度、钢板厚度和纵筋配筋率的增加而增加,但其增加的程度随连梁跨高比的减小而减小;连梁的承载力随墙肢配筋率的增加逐渐增大,增加的程度随墙肢配筋率的增加而减小.
[Abstract]:The seismic behavior of steel plate and concrete combined beam is simulated by finite element software, and the correctness of the model is verified by comparing with the experimental results. Through a large number of numerical simulations, the effects of such parameters as span height ratio, steel plate anchoring length, steel plate thickness, reinforcement ratio of longitudinal reinforcement and reinforcement ratio of wall limb on seismic behavior of steel-concrete composite beams are studied. The results show that the stress-fracture energy relationship of concrete is used to consider the tensile softening property of concrete, and the elastic-plastic finite element analysis of steel plate and concrete composite beams can be better carried out. The yield load and peak load decrease gradually with the increase of span height ratio, but the ductility performance is improved gradually, the bearing capacity and stiffness of connecting beam are increased with the length of steel plate anchoring, the ratio of span to height has a significant effect on yield load and peak load, and the yield load and peak load of connecting beam decrease gradually with the increase of span height ratio. The thickness of steel plate and the reinforcement ratio of longitudinal reinforcement increase, but the increasing degree decreases with the ratio of span to height of the connecting beam decreasing, and the bearing capacity of the connecting beam increases gradually with the increase of the reinforcement ratio of the wall limb, and the increase degree decreases with the increase of the reinforcement ratio of the wall limb.
【作者单位】：西安建筑科技大学土木工程学院;西部建筑科技国家重点实验室(筹);
【基金】：国家自然科学基金项目(51178380,51108370) 教育部长江学者和创新团队发展计划项目(IRT13089)
【分类号】：TU398.9;TU352.11

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