环境温度和地震对钢管混凝土拱桥振动特性的影响分析  

Analysis of Influence of Environmental Temperature and Earthquake on Vibration Characteristics of Concrete-Filled Steel Tube Arch Bridge

作　　者：曹建国 甘富军 Cao Jianguo;Gan Fujun(Highway Administration of Qinghai Province,Xining 810000,China)

机构地区：[1]青海省公路局,青海西宁810000

出　　处：《系统仿真技术》2024年第4期342-346,351,共6页System Simulation Technology

摘　　要：随着我国经济和桥梁行业的快速发展,大跨度和施工便捷的需求推动了钢管混凝土拱桥的发展。钢管混凝土拱桥的振动特性对拱桥的安全性能尤为重要。本研究以四川省某钢管混凝土拱桥为研究对象,通过Midas/Civil仿真软件对所研究桥梁进行建模。在此基础上,通过设定不同的参数值,研究环境温度变化和地震对钢管混凝土拱桥振动特性的影响。研究结果表明,环境温度对桥梁材料的弹性模量有影响,材料不同,影响程度也不同;环境温度对桥梁自振频率有影响,位置不同影响程度也不同;地震对桥梁应力和位移均有影响,位置不同,影响程度也不同。桥梁设计需满足抗震要求。With the rapid development of China's economy and bridge industry,the demand for large span and convenient construction has driven the development of concrete-filled steel tube(CFST)arch bridges.The vibration characteristics of CFST arch bridges are particularly important for their safety performance.By taking a CFST arch bridge in Sichuan province as an example.The model of this bridge is established with Midas/Civil simulation software.On this basis,by setting different parameter values,the influence of environmental temperature changes and earthquakes on the vibration characteristics of CFST arch bridges is studied.The research results indicate that environmental temperature has an impact on the elastic modulus of bridge materials,and the degree of influence varies depending on the material used.The ambient temperature has an impact on the natural frequency of bridges,and the degree of influence varies depending on the location.Earthquakes have an impact on both stress and displacement of bridges,with varying degrees of influence depending on the location.Bridge design must meet seismic resistance requirements.

关 键 词：环境温度 地震 软件模拟 钢管混凝土拱桥 振动特性 

分 类 号：TU37[建筑科学—结构工程]