高台基木结构在交通载荷作用下的振动响应研究

DYNAMIC RESPONSE OF A TIMBER STRUCTURE WITH HIGH-PLATFORM FOUNDATION UNDER TRAFFIC LOADS

  • 摘要: 以西安钟楼为研究背景, 建立了钟楼-土层-隧道结构三者共同作用的三维有限元模型, 通过动力有限元分析得到了模拟地铁列车载荷作用下钟楼的振动响应规律; 根据现场全天候监测,得到了钟楼在地面交通载荷作用下的振动响应; 在此基础上, 利用SRSS方法将二者进行叠加,从而得到了钟楼木结构在地面和地下交通载荷共同作用下的动力响应, 并根据规范对其进行了评估, 所得结论为今后相近古建筑在交通振动载荷作用下的响应分析及评估提供了参考依据.

     

    Abstract: Thetimber structure with high-platform foundation is themain form of historic buildings in China, such as bell tower and drum tower.Taking Xi'an Bell Tower as an example, a three-dimensional finite elementmodel of the bell tower-soil-tunnelstructure interaction is built, and the dynamic response of the belltower under simulated metro-induced loading is obtained by means of dynamicfinite element analysis. The vibration response of the bell towerunder ground traffic loads were obtained through all-weatherfield monitoring. These two results are combined by using theSRSS method to obtain the response of the timber structure of the belltower under combined action of ground and underground traffic loadings.The structure may be evaluated according to the technical specifications, theresults may serve as a reference for dynamic response analysis andassessment of similar historic buildings under traffic loads.

     

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