OALib Journal期刊
基于CFD方法的大跨高墩刚构桥梁风荷载数值识别
Keywords: 桥梁工程 ,风荷载 ,CFD ,超高薄壁墩 ,数值识别
Abstract:
针对峡谷地区典型特大跨高墩桥梁结构风荷载的不确定性问题,采用计算流体动力学(CFD,ComputationalFluidDynamics)方法,对大跨变截面主梁和超高双柱薄壁桥墩的风荷载进行数值识别。研究不同气流攻角对主梁结构风荷载的影响、不同气流风偏角对超高薄壁墩风荷载的影响、考虑尾流干扰效应的双柱薄壁桥墩气动力变化过程。同时,从气流作用微观角度分析了气流对大跨高墩刚构桥梁结构风荷载的作用机理。通过数值计算,为设计人员进行大跨高墩桥梁风荷载的取值提供了参考,对目前我国相关桥梁设计规范的缺陷进行了有效的补充。
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