钢-混组合连续梁桥中支点顶升施工过程受力分析

摘要:

支点顶升法是钢-混组合连续梁桥对负弯矩区桥面板施加预压应力的方式之一,本文结合嘉兴中环快速路主线高架设计案例,研究了不同顶升量对钢-混组合连续梁桥在施工过程和成桥后受力的影响规律,在满足结构耐久性要求的前提下,分析了不同跨径钢-混组合连续梁桥的最优顶升量,可为今后类似项目提供参考。

Abstract:

The fulcrum jacking method is one of the ways to improve the mechanical performance in the negative bending moment zone of steel-concrete composite continuous bridges. Based on the design case of Jiaxing Central Expressway Viaduct, this paper studies the influence of different jacking displacement on the stress of steel-concrete composite continuous beam bridge during construction and after completion, and analyzes the optimal jacking amount of steel-concrete composite beam bridges with different spans on the premise of meeting the structural durability, which can provide reference for similar projects in the future.