EVALUATION OF DYNAMIC CHARACTERISTICS OF 19-STORY ASYMMETRIC STEEL BUILDING BY AMBIENT VIBRATION TESTS

摘要：

In order to investigate the dynamic properties of asymrnetriC steel building with semi-joints connections．Ambient vibration tests are camed out on all asymmetric steel building constructed in the Tehran mega cit．The purpose of this work is to demonstrate a unified procedure for determining the natural frequencies．Modal damping ratios and modal shapes of the structure from its ambient vibration data．Fourier amplitude spectra have been calculated from several intervals of a 40 minutes period of ambient vibration record．Measurements made from the ambient vibration records show tllat the first-mode frequencies of horizontal vibration were 0．73 Hz on E-W direction，0．78 Hz on N- S direction and the first tensional vibration frequency was 1．66 Hz and damping ratio for first mode in E-W and N-S directions were 0．047．The results obtained from tests，were compared to mathematical model of the building．

关键词： Dynamic characteristics Asymmetric steel building Ambient vibration tests

作者: H.Shakib N.Charkhiari

作者单位: Professor,Department of Civil Engineering，Tarbiat Modares University/Tehran Graguate Student,Department of Civil Engineering Tarbiat Modares University/Tehran

会议类型: 国际会议

会议名称: The Second International Conference on Advances in Experimental Structural Engineering(第二届实验结构工程进展国际会议)

会议地点: 上海

会议语种:英文

页码: 469-476

在线出版日期: 2007-12-04（万方平台首次上网日期，不代表论文的发表时间）