The response of thin suspended prestressed concrete slabs to vibrational loading

Abstract

The effect on thin high span to depth ratio due to structural vibrations was investigated. Dynamic loading tests were performed at four different existing buildings, making use of the same construction system. Subjective evaluation, in terms of building damage and nuisance of all positions at various frequencies of all the sites were recorded. The two modes analysed were the Building Damage Tri-axial (BD:T) and the Whole Body Tri-axial (WB:WT) by using a particular module. This was then loaded on to the meter, which was connected to a tri-axial accelerometer to read results in the three orthogonal directions. This was mounted on the three positions on a typical slab, these being at the support, at mid-span and intermediate between the two positions. Vibrational loading was induced by means of a compactor with three varying speeds. This procedure was performed at all the sites. The results were then compared to the actual measured values given by the standards and also compared with each other. The structure performing best for the use in the proposed criterion, was selected.