山区高墩大跨连续刚构桥稳定性影响因素研究  

Research on Stability Influence Factors of a Continuous Rigid Frame Bridge with Long Span and High Piers in Mountainous Area

作　　者：陈晔 张璟 夏志豪 刘旭政[2] Chen Ye;Zhang Jing;Xia Zhihao;Liu Xuzheng(Jiangxi Transportation Design and Research Institute Co.,Ltd.,Nanchang,China;School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang,China)

机构地区：[1]江西省交通设计研究院有限责任公司,江西南昌 [2]华东交通大学土木建筑工程学院,江西南昌

出　　处：《科学技术创新》2024年第16期187-190,共4页Scientific and Technological Innovation

摘　　要：本文选用四川省某高墩大跨度连续刚构桥为例,通过有限元分析软件研究了该桥在最高墩阶段、最大悬臂阶段和成桥阶段各组合工况下的结构稳定性,对比分析了桩土作用、混凝土强度、墩高、壁厚等参数对桥梁结构稳定安全系数的影响。研究表明:在最大悬臂阶段一侧挂篮坠落时结构稳定性最差;风荷载和温度荷载对结构稳定性影响较小,桩土作用对结构稳定性影响较大;随着桥墩混凝土强度的提高,结构稳定安全系数越大,但提升幅度不断减小。研究结论对于山区高墩大跨连续刚构桥的稳定性分析提供了有益参考。To investigate bridge stability at the highest pier stage,the maximum cantilever stage and the completion stage under various load combinations,the finite element model of a continuous rigid frame bridge with long span and high piers in Sichuan Province is established.The stability influence of pile-soil effect,concrete strength,pier highest and wall thickness is analyzed.The research shows that the stability of rigid frame bridge is the most unfavorable when one side suspending crane falling at the maximum cantilever stage.The wind load and temperature effect have minor influence on structure stability,but the effect of pile-soil interaction is great.The structure stability increase with the concrete strengthen improvement,but the promotion decreases continuously.And the research results can give good reference to the stability analysis of continuous rigid frame bridges with long span and high piers in mountainous area.

关 键 词：连续刚构桥 稳定性分析 高墩 影响因素 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]