拼接加宽梁桥大件车辆通行安全评估及监测研究

Study on large transportation driving safety assessment and monitoring of jointing-widening bridge

以总重460 t大件车辆通行某高速公路改扩建拼接装配式梁桥为例,对其进行了通行安全评估及桥面板局部验算,给出了合理的通行方案,同时对大件车辆通行桥梁时的结构响应进行了实时监测,采用有限元软件ANSYS建立实桥模型,计算得到大件车辆荷载作用下箱梁最大理论挠度值和应变值,对实时监测结果与理论计算结果进行了对比分析,结果表明评估结论准确,通行方案可行。

Taking the highway transformation and expansion assembly-style bridge with 460 t of large transportation driving as an example, through evaluates its transportation safety and checking local bridge deck, combining with rational transportation scheme, the paper carries out re- al-time monitoring for the bridge structure response with large transportation, establishes actual bridge model with finite element software ANSYS, achieves maximum box girder deflection value and strain value under large transportation load, and comparatively analyzes real-time monitoring value to theoreiical calculation resuh. Results show that： the assessment result is accurate; the driving scheme is feasible.