09-10-2014, 02:41 PM
Ambient vibration measurements of many buildings have been recorded across the world in the past to determine their dynamic properties, in particular, to ascertain the properties of the fundamental modes of vibration. It is also recognized that the experimental data from one region may not be used in another owing to the differences in the construction methods and materials. During this ambient vibration survey, a total of seventeen (17) buildings are tested to determine the fundamental lateral translational natural periods and the corresponding mode shapes of vibration. All of these buildings are situated in Kanpur (India), which lies in the seismic zone III as per the current seismic code. Further, the buildings are reinforced concrete moment resisting frame (RC MRF) buildings with unreinforced masonry (URM) in brick as infill walls. The buildings tested are analytically modeled using the standard analysis software, ETABS. Three analytical models are considered. In all these models, the floor slabs are assumed to be rigid in their own plane. Regression analyses of fun