摘要
为研究斜拉桥桥塔竖转施工阶段结构风致振动响应,结合青岛市海洋活力区海口路跨风河新建桥梁结构健康监测系统,实测主塔竖向转体施工期桥位风环境和结构振动加速度,采用统计方法分析主塔和主梁的振动响应与桥位风速的关系。结果显示,桥塔竖转施工主要引起主塔顺桥向和主梁横向的振动;主塔顺桥向、横桥向以及主梁竖向振动加速度响应与平均风速基本呈线性关系,说明斜拉桥竖转期间风环境对桥梁结构的振动影响不容忽视,为斜拉桥主塔竖转施工的安全性提供参考。
The wind-induced vibration response of the structure during the vertical rotation construction stage of the cable-stayed bridge tower is studied.A structural health monitoring system is employed in the new bridge across the river on Haikou Road,Qingdao Ocean Vitality Zone.The wind environment and structural vibration acceleration of the bridge during the vertical rotation construction of the main tower are measured,and the relationship among the vibration response of the main tower,the main beam,and the wind speed of the bridge is analyzed by statistical method.The results show that the vertical rotation construction of the bridge tower mainly causes the vibration of the main tower along the bridge direction and the horizontal vibration of the main girder;the vibration acceleration response along the bridge direction,transverse direction of the main tower,and the vertical direction of the main girder is basically linear with the average wind speed,which indicates that the influence of the wind environment on the vibration of the bridge structure during the vertical rotation of the cable-stayed bridge cannot be ignored,providing the reference for the safety of the vertical rotation construction of the main tower of the cable-stayed bridge.
作者
钟仁亮
张伟威
刘振
何飞
吴文洋
ZHONG Renliang;ZHANG Weiwei;LIU Zhen;HE Fei;WU Wenyang(China Construction Eighth Bureau Development and Construction Co.,Ltd.,Shandong Qingdao 266000,China;Harbin Engineering University,Harbin 150001,China)
出处
《低温建筑技术》
2022年第12期114-118,共5页
Low Temperature Architecture Technology
基金
国家自然科学基金项目(52278297)。
关键词
斜拉桥
竖转
结构健康监测系统
风振响应
现场实测
cable-stayed bridge
vertical rotation
structural health monitoring system
wind-induced vibration response
field measurement
