上海地区独柱墩连续箱梁横向稳定性计算分析

Calculation and Analysis on Lateral Stability of Single-column Pier Continuous Box Girder Bridge in Shanghai

以上海某高速立交匝道4联独柱墩连续箱梁桥为研究对象,分别根据2017年《上海地区梁桥横向稳定验算指南》和2018年《公路钢筋混凝土及预应力混凝土桥涵设计规范》的相关规定,利用Midas Civil对其进行数值模拟,分析其横向抗倾覆稳定性,比较两种方法的异同,研究独柱墩连续箱梁横向抗倾覆稳定性能与曲率半径的关系,对独柱墩连续箱梁桥横向抗倾覆的计算方法进行探讨,旨在为上海地区同类桥梁的抗倾覆验算提供一定的参考。

Taking a 4-link single-column pier continuous box girder bridge of the interchange ramp in an expressway of Shanghai as a research object, according to the related stipulations of 2017 Guidelines for Checking the Lateral Stability of Beam Bridges in Shanghai and 2018 Specifications for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts, its numerical simulation is carried out by Midas Civil to analyze its lateral anti-overturning stability. The similarities and differences between two methods are compared. The relationship between the lateral anti-overturning stability and the curvature radius of the single-column continuous box-girder bridge is studied. And the calculation method of lateral overturning resistance of the single-column pier continuous box girder bridge is discussed. Its aim is to provide a certain reference for the anti-overturning checking calculation of the similar bridges in Shanghai.