组合脊骨梁斜拉桥主梁横隔板受力性能分析与优化  

Analysis and Optimization of Stress Performance of Main Girder Diaphragm of Composite Spine Girder Cable-stayed Bridge

作　　者：沈晓燕[1] 殷晨昂 Shen Xiaoyan;Yin Chen'ang(Anhui Communications Vocational&Technical College,Hefei,Anhui 230051;Tongji University,Shanghai 200092)

机构地区：[1]安徽交通职业技术学院,安徽合肥230051 [2]同济大学,上海200092

出　　处：《工程技术研究》2022年第8期8-11,17,共5页Engineering and Technological Research

基　　金：2020年安徽高校自然科学研究重点项目“洪水作用下桥墩动力响应研究”(KJ2020A1061)。

摘　　要：为明确大悬臂组合脊骨梁斜拉桥横隔板受力性能,文章以合枞高速上的孔城河大桥为背景工程,采用通用有限元软件ANSYS进行空间实体有限元分析,针对原设计钢箱内部横隔板应力超出控制值的情况,开展箱室内钢横隔板以及局部加劲措施的优化工作。计算分析表明,增加钢横隔板尺寸、纵向加劲板高度,局部增加竖向加劲肋,以及将外侧混凝土桥面板与钢纵梁进行连接,均可一定程度上改善钢箱内横隔板受力性能,有效控制局部应力水平,可根据经济指标、受力需求及加工便利性等因素合理组合应用。文章研究得出的横隔板受力特性及相应构造优化措施可为同类工程提供借鉴与参考。In order to clarify the force performance of diaphragm of large cantilever composite spine girder cable-stayed bridge, this paper takes Kongcheng River Bridge on Hezong Expressway as the background project, and uses the general finite element software ANSYS to carry out the finite element analysis of spatial entity. In view of the situation that the stress of the diaphragm inside the original design steel box exceeds the control value, the optimization work of the steel diaphragm inside the box and the local stiffening measures is carried out. The calculation and analysis show that increasing the size of the steel diaphragm,the height of the longitudinal stiffening plate, increasing the vertical stiffening rib locally, and connecting the outer concrete bridge deck with the steel longitudinal girder can improve the force performance of the diaphragm in the steel box to a certain extent, effectively control the local stress level, and can be reasonably combined and applied according to economic indicators, stress requirements and processing convenience. The stress characteristics of diaphragm and corresponding structural optimization measures can provide references for similar projects.

关 键 词：脊骨梁斜拉桥 钢横隔板 数值分析 构造优化 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]