Abstract The use of single-storey schemes appears necessary in order to investigate lateral-torsional coupling in building structures. In this paper, the torsional behaviour of an eccentric single-storey system based on undamped free vibration analysis has been investigated with particular emphasis on double eccentricities. An eccentricity between the center of rigidity and the center of mass in a building system causes the different torsional behaviour during a seismic loading. This approach reveals clearly how the double eccentric system behaves in relationship with the natural frequencies and modes and translational or torsional motion of the modeling system. From the parametric analysis of such an approach the determinative role of the distance from the center of mass to the center of rotation corresponding to the torsional and lateral stiffness ratio of the system becomes an obvious means of defining the torsional behaviour. From the outcome of applying the model, the building model can be classified as Torsionally Stiff (TS) and Torsionally Flexible (TF) based on the way the model has been configured in terms of the loci of the centers of rotation.
Demonstration of torsional behaviour using vibration-based single-storey model with double eccentricities
KSCE Journal of Civil Engineering ; 14 , 4 ; 557-563
2010-06-03
7 pages
Article (Journal)
Electronic Resource
English
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