Ambient Modal Identification of a Coupled Floor Slab System
This paper presents work on full -scale vibration testing of the second and third floor slabs of the Tin Shui Wai Indoor Recreation Center. The slabs are supported by one-way long span steel trusses, which are connected by diagonal members and vertical columns to form a mega -truss. On 2/F are a large multi -function room and children play area , while the third floor hosts two basketball courts. Based on their expected usage , significant cultural vibrations with possible rhythmic activities can be expected. To determine the actual dynamic characteristics of the constructed slab system , ambient test was performed. Thirty five setups were carried out in the ambient test to determine the mode shapes with a high spatial resolution using six triaxial accelerometers. A recently developed Fast Bayesian FFT Method is used to identify the modal properties using the ambient data in indi -vidual setups. The mode shapes from the individual setups are assembled by a least square fitting procedure. The dynamic properties identified from the ambient vibration test ,as well as their posterior uncertainty and setup-to-setup variability ,will be compared and discussed.
S.K.AU Y.C.NI F.L.ZHANG H.F.LAM
Department of Building and Construction , City University of Hong Kong ,83 Tat Chee Avenue, Kowloon, Hong Kong
国际会议
5th International Symposium on Environmental Vibration(第五届环境振动国际研讨会)
成都
英文
224-231
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）