高墩大跨径连续刚构桥施工状态抗风稳定性分析  

Analysis of Wind Resistance Stability of High-Pier Long-Span Continuous Rigid Frame Bridge During Construction

作　　者：高永吉 GAO Yongji(China Railway Construction Urban Transportation Development Co.Ltd.,Suzhou Jiangsu 215151,China)

机构地区：[1]中铁建城建交通发展有限公司,江苏苏州215151

出　　处：《铁道建筑技术》2024年第10期108-112,共5页Railway Construction Technology

基　　金：中铁二十局集团有限公司科技研发项目(J15-02B)。

摘　　要：高墩大跨径连续刚构桥凭借其施工成本低、跨越能力强等优点,在山区峡谷等不良自然条件下的桥梁建设中得到广泛应用。本文深入探讨高墩大跨径连续刚构桥在施工状态下的抗风稳定性问题,通过选取施工过程中4个典型主梁断面,运用数值模拟方法,分析流场速度、涡旋及断面各位置压力分布特点,进而得到各断面的三分力系数;最后采用颤振稳定性参数F进行综合评估,对施工状态下的主梁颤振稳定性进行判定,以便为确保桥梁建设的安全性与耐久性提供重要的理论依据和技术支撑。With its advantages of low construction cost and strong spanning ability,high-pier long-span continuous rigid frame bridges have been widely used in bridge construction under adverse natural conditions such as mountainous valleys.This paper delves into the stability issues of high-pier long-span continuous rigid frame bridges during construction.By selecting four typical sections from the construction process,numerical simulation techniques are applied to analyze the flow field velocity,vortex formation,and pressure distribution characteristics at various positions within the sections,thereby obtaining the three-component force coefficients for each section.Finally,the flutter stability parameter F is used for comprehensive evaluation to determine the flutter stability of the main beam under construction conditions,in order to provide important theoretical basis and technical support for ensuring the safety and durability of bridge construction.

关 键 词：高墩大跨连续刚构桥 抗风性能 CFD数值模拟 颤振稳定性能 F参数 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]