土-桩-结构相互作用对大跨悬索桥动力特性的影响研究  

Research on Effects of Soil-pile-structure Interaction on Dynamic Behavior of Long-span Suspension Bridge

作　　者：王浩[1] 李爱群[1] 韩晓林[1] 李枝军[1] 

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096

出　　处：《工程抗震与加固改造》2006年第2期32-35,共4页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金重大国际合作项目(50410133);国家自然科学基金重点项目(50538020);国家自然科学基金资助项目(50378017);东南大学优秀博士学位论文基金资助(YBJJ0508)

摘　　要：本文以国内第一大跨桥梁———润扬长江公路大桥南汊悬索桥为研究对象,基于大型有限元分析软件ANSYS建立了该桥的三维有限元模型,其中采用质量-弹簧体系模拟了土-桩-结构的相互作用。以此为基础对润扬悬索桥的自振特性进行了分析,重点研究了土-桩-结构相互作用因素对大跨悬索桥动力特性的影响,与现场动力测试结果的良好吻合表明了有限元分析结果的可靠性。研究结果为大桥的损伤预警和状态评估奠定了研究基础。Runyang Suspension Bridge, with a main span of 1490m, is the longest bridge in China. In this paper, a 3-dimensional FE model for the bridge is established with finite element program ANSYS and the soil-pile-structure interaction is simulated by use of the mass-spring model. Based on the FE model, model analysis is carried out and the effects of soil-pile-structure interaction on dynamic behavior of the longspan suspension bridge are specially studied. Analysis results are proved to be reliable by the measurements of dynamic test. The results provide important research basis for damage alarming and health monitoring of the bridge.

关 键 词：大跨悬索桥 动力特性 土-桩-结构相互作用 动力测试 健康监测 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]