大跨弯连续刚构桥自振频率计算公式  

Calculation Formula of Fundamental Frequency for Continuous Rigid Frame Bridge

作　　者：韩智强 刘世忠 周勇军[2] 晋民杰 王俊霞 HAN Zhi-qiang;LIU Shi-zhong;ZHOU Yong-jun;JIN Min-jie;WANG Jun-xia(School of Transportation and Logistics,Taiyuan University of Science and Technology,Taiyuan 030024,China;Engineering Research Center for Large Highway Structure Safety of the Ministry of Education,Chang an University,Xi an 710064,China;Shanxi Tongchang Engineering Survey design Consultants Co.,Ltd,Taiyuan 030024,China)

机构地区：[1]太原科技大学交通与物流学院,太原030024 [2]长安大学公路大型结构安全教育部工程研究中心,西安710064 [3]山西通畅工程勘察设计咨询有限公司,太原030024

出　　处：《太原科技大学学报》2021年第4期288-291,295,共5页Journal of Taiyuan University of Science and Technology

基　　金：山西省科技攻关(201803D31076)。

摘　　要：为了研究大跨弯连续刚构桥自振频率变化规律,依据Rayleigh基本理论,推导桥梁自振频率的计算公式,并以某一典型桥梁为依托工程,运用通用软件ANSYS,通过变化结构的曲率半径,建立24种仿真模型,获取了桥梁结构一阶振动频率变化规律;修正自振频率的计算公式,并通过实际工程进行验证公式的适用性。结果表明:连续刚构桥第一阶振动以桥墩的纵向振动为主;计算值与算例验证误差为5%,满足工程需求。In order to study natural vibration frequency of continuous rigid frame bridge,based on Rayleigh s basic theory,the calculation formula of bridge vibration frequency is derived.Firstly,a typical rigid frame bridge with high piers was taken as an example,24 simulation models are established by changing the radius of curvature of the structure.The first-order vibration frequency variation of the bridge structure is obtained.The formula for calculating the frequency is revised and the applicability of the formula is verified through actual engineering.The results show that the first-order vibration of the high pier continuous rigid frame bridge is mainly the longitudinal vibration of the pier;the calculated value and the calculation example verification error are 5%,which meets the engineering requirements.

关 键 词：大跨弯连续刚构桥 自振频率 计算公式 曲率半径 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]