大跨度斜拉扣挂悬臂浇筑混凝土拱桥施工期抖振响应分析  

Buffeting Response Analysis of Long-Span Arch Bridge During Construction Using the Cantilever Casting with Temporary Stays Method

作　　者：张基进 郭吉平 刘杰 ZHANG Jijin;GUO Jiping;LIU Jie(Guiyang 550001,China)

机构地区：[1]贵州路桥集团有限公司,贵阳550001

出　　处：《结构工程师》2021年第3期183-188,共6页Structural Engineers

摘　　要：为研究大跨度拱桥施工状态的风致抖振响应,以某主跨240m的斜拉扣挂悬臂浇筑拱桥为工程背景,采用时域分析方法对施工最大悬臂状态进行了数值计算。首先对拱桥施工期的结构动力特性进行了分析,然后采用谐波合成方法模拟桥梁各空间点的纵向和竖向脉动风速样本,在此基础上得到了不同风速工况下的抖振响应。研究结果可为该桥施工期受风安全性分析提供依据,为同类型的桥梁结构抗风设计提供参考。To study the wind-induced buffeting response of long-span arch bridge during construction,the longest cantilever stage of an arch bridge with the center span length of 240 m is calculated by time domain method.The dynamic characteristics of structure during construction is analyzed firstly,and further the harmonic synthesis method is adopted to simulate the random wind turbulence field for the bridge,finally,buffeting responses of the project under different work conditions of wind velocity are calculated.The result can provide the basis for further construction safety assessment under wind load and be referenced in the wind-resistant design of other related engineering projects.

关 键 词：大跨度拱桥 抖振响应 斜拉扣挂 施工期 时域分析 

分 类 号：U445.57[建筑科学—桥梁与隧道工程] U441.3[交通运输工程—道路与铁道工程]