摘要
为考察西安钟楼盘道行驶车辆对钟楼木结构微振动的影响,以及为预测西安地铁二号线和六号线运营后列车振动对西安钟楼的影响提供依据,对西安钟楼进行了现场动力反应测试,建立了木结构振动分析模型并依据《古建筑防工业振动技术规范》对行驶车辆对钟楼木结构微振动的影响进行了评估.测试结果表明:不同时段钟楼木结构的振动水平差别较大;木结构顶部的振动水平较柱础的振动放大较明显,且木结构的水平振动速度在南北(SN)和东西(EW)两个方向的差别较大.分析结果表明:车流量和车速较大的时段木结构柱顶的振动速度超过了"古建筑防工业振动规范"振动速度的限值.最后,提出了一些必要的减振措施.
It can usually be neglected that the vibration excited by traffic vehicles hurt the strength and safety of common buildings, so this kind of vibration has not been paid enough attention to. However, the micro-vibration in ancient buildings excited by vehicles should not be neglected. In order to inspect the influence of micro-vibration excited by vehicles on wooden structure of Xi＇an Bell Tower, and to provide reference to forecast the influence of vibration excited by subway on wooden structure of Xi＇an Bell Tower, dynamic response test has been carried out. The vibration analysis model of wooden structure has been established and the security evaluation of timber structure accomplished based on Technical Specifications for Protection of Historic Buildings against Man-made Vibration. The results indicated that the differences of vibration levels in timber structure are extraordinarily obvious during the different interval time. Bomparing the vibration levels of the column foundation, the vibration levels of upper floor are enlarged obviously. The differences of vibration levels in timber structure in the horizontal vibration velocity （at SN and EW directions） are also obvious. It is shown that the vibration velocity at top of timber structure column exceeded limited value of Technical Specifications for Protection of Historic Buildings against Man-made Vibration during the interval with high volumes and velocities of traffic vehicles. Finally, some essential vibration reduction measures are proposed.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2009年第4期512-517,共6页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
西安市科技计划项目(YF07207)
关键词
行驶车辆
西安钟楼
微振动
动力反应测试
安全评估
减振措施
traffic vehicles
Xi＇an Bell Tower
micro-vibration
field measurement
security evaluation
damping measures
