环境温度对混凝土梁式桥频率的影响研究  

Study on Environmental Temperature on Frequency of Concrete Beam-type Bridge

作　　者：贺文宇 周磊 李志东 贺佳[2] 户东阳[3] HE Wenyu;ZHOU Lei;LI Zhidong;HE Jia;HU Dongyang(Department of Civil Engineering,Hefei University of Technology,Hefei 230009,China;College of Civil Engineering,Hunan University,Changsha 410082,China;Kunming Survey,Design and Research Institute Co.,Ltd.of CREEC,Kunming 650200,China)

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009 [2]湖南大学土木工程学院,湖南长沙410082 [3]中铁二院昆明勘察设计研究院有限责任公司,云南昆明650200

出　　处：《湖南大学学报（自然科学版）》2024年第1期33-42,共10页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(52378298);安徽省杰出青年基金资助项目(2208085J20)。

摘　　要：现有关于环境温度影响桥梁自振频率特性的研究通常针对特定桥梁,其通用性受到了一定的限制.鉴于混凝土梁式桥是应用最广泛的桥梁类型,本文从自振频率解析解出发,推导了混凝土梁式桥自振频率和温度关系的通用迭代计算公式,并通过数值算例和环境耦合箱模型试验进行验证.结果表明:环境温度对桥梁自振频率的影响不可忽视,所提出的桥梁自振频率迭代计算公式能有效考虑环境温度的影响,可用于计算实际温度作用下的混凝土梁式桥的频率.The existing studies on the influence of the environmental temperature on the natural frequency characteristics are usually carried out for a specific bridge,and their applicability is limited.As concrete beam-type bridge is the most widely used bridge type,this paper deduces the general iterative formula of the relationship between natural frequency and temperature for concrete beam-type bridges and verifies it via numerical examples and laboratory tests.The results indicate that the influence of environmental temperature on the natural frequency cannot be ignored,and the proposed general iterative formula can effectively consider the environmental temperature influence and can be used to calculate the natural frequency of concrete beam-type bridges under actual temperature.

关 键 词：桥梁工程 迭代公式 自振频率 混凝土梁式桥 环境温度 

分 类 号：U446[建筑科学—桥梁与隧道工程]