既有多跨公路桥梁整体顶升主梁安全性分析

摘要

顶升技术是桥梁技术改造的重要方法.多跨桥梁整体顶升过程中主梁安全性是关键.结合工程实例,建立数值分析模型,分析不同工况条件下的主梁变形和截面应力,为确定安全的施工方案提供依据.%Lifting technology is an key measure in bridge technical renovation.the main beam safety is critical in integral lifting of multi-span bridges.The author set up numeric analytical model with help of engineering examples to analyze main beam distortion and sectional stress under different working conditions,so to provide basis for safe construction solutions.