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超高墩连续刚构桥悬臂阶段抗风性能研究

Research on Wind Resistance Performance of Cantilever Stage of Extra-high Pier Continuous Rigid Frame Bridge

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使用计算流体动力学(CFD)方法,获得桥梁关键截面的风荷载三分力系数,并计算静力三分力.基于Midas/Civil建立桥梁有限元模型,模拟对称、非对称和龙卷风荷载3种风荷载工况,以获取桥梁整体响应.结果表明,3种工况下,桥梁横向位移显著大于竖向和顺桥向位移,其中龙卷风工况导致最大横向位移,给结构带来不利影响.同时,墩底内力和应力均在材料承载范围内,符合施工安全要求.综合来看,桥梁抗风性能良好,但风荷载对超高墩连续刚构桥的横向位移影响显著,施工中需重点监测横向位移.
Computational fluid dynamics(CFD)method was used to obtain the aerodynamic force coefficients for the critical sections of the bridge and calculate the static aerodynamic forces.A finite element model of the bridge was estab-lished using Midas/Civil to simulate three scenarios:symmetric,asymmetric,and tornado loads,in order to assess the o-verall response of the bridge.The results indicate that under all three scenarios,the lateral displacement of the bridge is significantly greater than the vertical and longitudinal displacements,with the tornado scenario resulting in the maximum lateral displacement,posing adverse effects on the structure.Meanwhile,the internal forces and stresses at the base of the pier remain within the material's load-bearing capacity,meeting construction safety requirements.Overall,the wind resist-ance performance of the bridge is good.However,the impact of wind loads on the lateral displacement of the ultra-high pier continuous rigid frame bridge is significant,necessitating close monitoring of lateral displacements during construc-tion.

extrar-high pier continuous rigid frame bridgewind loadcantilever stageCFD methodwind-re-sistant performance

邹兰林、程鑫

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武汉科技大学汽车与交通工程学院,武汉 430065

超高墩连续刚构桥 风荷载 悬臂阶段 CFD方法 抗风性能

2024

武汉理工大学学报
武汉理工大学

武汉理工大学学报

影响因子:0.649
ISSN:1671-4431
年,卷(期):2024.46(10)