CAJ | 학술논문

以泰州大桥为对象，分析了整体结构温度变化对于三塔两跨悬索桥结构静动力特性的影响。从Euler-Bernoulli梁出发，导出了杆件单元的内力变化后的动力特性分析等效刚度表达式。通过温度变化后大跨桥梁的静力分析，得到构件单元内力增量，计算等效刚度，进而计算温度变化后的动力特性。利用ANSYS的二次开发功能，编制了相应的宏命令和分析模块，分析了结构整体温度变化对大桥动力特性的影响。结果表明：环境温度变化对于泰州大桥结构静动力特性影响明显，温度的变化与大桥自振频率的变化呈反比关系。在进行大跨桥梁试验模态分析，以及结构损伤识别等研究中应考虑环境温度的影响。
이태주대교위대상，분석료정체결구온도변화대우삼탑량과현색교결구정동력특성적영향。종Euler-Bernoulli량출발，도출료간건단원적내력변화후적동력특성분석등효강도표체식。통과온도변화후대과교량적정력분석，득도구건단원내력증량，계산등효강도，진이계산온도변화후적동력특성。이용ANSYS적이차개발공능，편제료상응적굉명령화분석모괴，분석료결구정체온도변화대대교동력특성적영향。결과표명：배경온도변화대우태주대교결구정동력특성영향명현，온도적변화여대교자진빈솔적변화정반비관계。재진행대과교량시험모태분석，이급결구손상식별등연구중응고필배경온도적영향。
As the object of Taizhou Yangtze River Bridge ,effect of the global structure temperature variation of on dynamic characteristics of three-tower and two-span suspension bridge are discussed in this paper .The dynamic characteristics of three-towers & two-spans suspension bridge is analyzed at different global temperature .From the Euler-Bernoulli beam ,the equivalent stiffness expression of dy-namic characteristics analysis after the internal force of the link element has changed is conducted .Ac-cording to the static analysis of long-span bridge after temperature variation ,the internal force incre-ment of link element can be derived .The equivalent stiff is obtained .Then the dynamic characteristics after the variation of temperature are formulated .The redevelop function of ANSYS has been used for the purpose of programming corresponding macro commands and analysis modules to investigate the influence of global temperature variation on dynamic characteristics of Taizhou Yangtze River Bridge . T he result show s that environmental temperature variation has a remarkable influence on the static and dynamic characteristics of Taizhou Yangtze River Bridge ,and the temperature variation is inverse-ly related to that of the vibration frequency for bridge .