长沙理工大学学报（自然科学版）2016，Vol.13Issue(1)：34-42,9.
考虑基础-墩-梁的大跨度连续刚构竖向振动特性分析
Analysis of vertical vibration characteristics of long span continuous rigid frame bridge considering foundation-pier-beam
摘要
Abstract
Based on a long span continuous rigid frame bridge,the finite element analysis software midas/civil is used to set up the two models with and without the consideration of the function of the foundation.Analyzed the foundation of piles and soil influence on vertical vibration characteristics of the large span continuous rigid frame bridge are analyzed.By changing the two kinds of quantitative analysis of the bridge pier design parameters in the model when analyzing the vertical vibration characteristics of long-span continuous rigid frame bridge piers on the influence law of basic consideration or not.The calculation results show that:considering the basic role will reduce the whole stiffness of the structure,natural frequency of vertical vibration is reduced,and the vibration mode of the whole bridge has a certain influence.With the increase of height of pier,the vertical fundamental frequency of the continuous rigid frame bridge is decreased,and the smaller the foundation.When the height of pier is higher than 30m,the foundation has little effect on the vertical vibration characteristics of continuous rigid frame bridge.In the analysis of vertical vibration charac-teristics of long span continuous rigid frame bridge,the foundation is not considered.But when the height of pier is less than 30m,the foundation has a greater impact,which should be considered in the role of the foundation.As the pier cross-section size increase,the verti-cal fundamental frequency of long span continuous rigid frame will increase,and the change of high relative to the pier,the change of the section size has little effect on the basis of the analysis of the vertical vibration characteristics of the continuous rigid frame bridge.关键词
连续刚构桥/竖向振动特性/有限元模型/基础作用/墩高/桥墩截面尺寸Key words
continuous rigid frame bridge/vertical vibration characteristics/finite element model/basic role/bridge pier分类
交通工程引用本文复制引用
刘建,吴凯..考虑基础-墩-梁的大跨度连续刚构竖向振动特性分析[J].长沙理工大学学报（自然科学版）,2016,13(1):34-42,9.基金项目
国家自然科学基金资助项目(51278072) （51278072）
