作　　者： ; ; ; ; ;

机构地区： 华南理工大学土木与交通学院

出　　处： 《振动与冲击》 2009年第4期14-17,24,共5页

摘　　要： 在土木工程领域,GPS作为一种新的结构振动健康监测方法正受到广泛关注。以在建的广州新电视塔(塔高610 m)为研究背景,利用RTK-GPS测量技术对其在台风以及一般风荷载作用下的动态特性进行了监测试验,获得了电视塔核心筒顶部一个测点沿其短轴和长轴方向的动位移时程曲线,位移曲线的谱分析结果表明,利用动态GPS观测能精确地识别出高耸结构物的低阶振动频率,其识别结果同加速度计识别结果以及有限元模型分析结果吻合很好。研究结果表明,在高耸结构施工监控和健康监测中,应用动态GPS技术进行环境激励动态特性监控是一种有效的方法。 Taking Guangzhou New TV Tower under construction as a research background, a case study of monitoring dynamic characteristics of a high-rise building under typhoon and normal wind excitation was presented using GPS measurement. Dynamic displacement time histories of one measuring point on the top of the TV Tower were obtained. From FFT analysis of the displacement time histories, few lower natural frequencies of the TV Tower were obtained. The identified natural frequencies from GPS measurement were compared with those from acceleration measurement and from finite element analysis, good agreements were found. This indicated that it is effective to monitor dynamic characteristics of a high-rise building using GPS measurement.

关 键 词： 高耸结构 动态特性 台风激励

领　　域： [建筑科学] [交通运输工程]