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Rotational components in structural loading
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DOI：10.1016/j.soildyn.2015.04.012.png)
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In this paper, the rotational loading pattern of multi-storey buildings supported on the spread and continuous interconnected single foundations is discussed. To achieve this, simplified relations for the estimation of (1) point rotations; (2) spatial variation of strong ground motions, and (3) foundation input motions are derived. The height-wise variation of the earthquake rotational loading of multi-storey buildings is parametrically evaluated by considering the location of the first rigid floor diaphragm and foundation type. In addition, the effect of the kinematic soil-structure interaction on the response spectrum of the rotational and translational components is studied. The numerical results provide a deeper insight into the rotational loading of structures in the middle-field zone, and show how the rotational components may detrimentally affect the structural response of multi-storey buildings depending on their kinematic characteristics. (C) 2015 Elsevier Ltd. All rights reserved.
Keyword:
Point, surface, and foundation rotation
Phase delay
Coherency
Spatial variation of strong ground motion
Kinematic soil structure interaction
Response spectrum
Random vibration analysis
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