斜拉桥悬臂施工阶段自振频率简化计算方法  被引量:1

Simplified Calculation Method of Vibration Frequency of Cable-stayed Bridge During Can tilever Con structio n Stage

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作  者:王洪云 尚念恒 彭霞[3] Wang Hongyun;Shang Nianheng;Peng Xia(Shandong Traffic Engineering Supervision Consulting Co.,Ltd.,Jinan 250002,China;Taian Highway Planning and Design Institute,271002,China;Shandong Jiaotong University,Jinan 250023,China)

机构地区:[1]山东省交通工程监理咨询有限公司,济南250002 [2]泰安市公路规划设计院,271002 [3]山东交通学院,济南250023

出  处:《特种结构》2021年第1期53-58,共6页Special Structures

摘  要:本文采用双质点法建立了斜拉桥施工阶段动力分析模型,推导了斜拉桥施工阶段自振频率的计算公式,并对公式进行了合理简化,得到斜拉桥施工阶段自振频率的估算公式。基于实桥工程,将双质点振动模型、自振频率估算公式、有限元法分析和现场的模态测试结果进行了对比分析。结果表明,估算值与有限元法很接近,估算公式为自振频率的计算提供了较为准确和快捷的计算方法,可为斜拉桥设计和施工监控工作提供参考。Double-Mass simplified model was adopted to calculate the vibration frequency of cable-stayed bridge during cantilever construction stage in this paper.And the simplified formula of vibration frequency of cable-stayed bridge during cantilever construction stage was deduced.Based on a bridge project,results of doublemass vibration model,simplified formula,finite element model analysis,and modal test on site were compared.The experimental and a lot of computational results showed that the finite element method accurately simulates the actual stress state of the bridge and the double-mass model and the estimation formula providing a more accurate and fast calculation method for calculating the vibration frequencies,which should provide a reference for the similiar type of bridge design and construction.

关 键 词:斜拉桥 悬臂施工阶段 自振频率 双质点估算公式 有限元法 模态测试 

分 类 号:U445.4[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]

 

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