摘要
实测高层建筑结构的动力特性具有重要的意义。介绍了一种实测高层建筑结构动力特性的方法:结合同济大学土木工程学院自主开发的SVSA系统,利用环境激励下结构的脉动响应,确定结构物的动力特性。首先简述了该套测试系统的工作原理及使用方法,然后通过对同济大厦A座的现场实测,得到结构的自振频率与阻尼比,画出结构的前几阶平动振型,最后将测试结果与数值模型的分析结果进行对比,对比的结果显示,数值模型的分析结果与实测动力特性之间存在一定的误差,结构的计算周期约为实测周期的1.6倍。本文对于高层建筑结构的动力特性实测具有一定的应用参考价值。
Actual measurement of dynamic characteristics of high-rise buildings is of great significance. A new dynamic characteristic recognition method under ambient excitation was introduced in this paper. Dynamic characteristics of the Tongji Building No. A was studied based on the field measurement using the SVSA system. The ＂relay method＂, that is, relaying accelerometers among floors to get successive ratios was used in the tests. Natural frequencies, damping ratios, and first several order modes, were obtained from the statistical analysis on the measured data. The research results of this paper show that the method is effective for measuring structure vibration under ambient excitations, which is important for studying dynamic characteristics and anti-seismic and wind resistance performances of high-rise buildings.
出处
《结构工程师》
北大核心
2014年第2期90-96,共7页
Structural Engineers
关键词
环境振动
SVSA系统
高层建筑
动力特性
ambient excitation, svsa, high-rise building, dynamic characteristics
作者简介
联系作者，Email：fuzongchao@yahoo．cn
