Towards optimal design of high-rise building tube systems (pages 447–464)

摘要

The primary objectives of this study are to investigate effects of varying design parameters on the tubenaction and shear lag behaviour of a typical reinforced concrete frame-wall tube building, and proposenoptimal design approaches for similar tube structures. A parametric study was conducted with selected keyndesign variables on the performance of a 55-storey hotel building planned in New York City. The lateralnforce resistance of the case study building is primarily exerted by exterior shear walls in one direction andnby exterior moment frames in the other direction, enhanced by the tube action credited to the connectionnof the walls and the frames. The design variables considered for the parametric study include the columnndepth, beam depth, column width and beam width of the moment frames. The performance of each modelnwas assessed in terms of overall and critical (maximum) storey drifts, force distributions between variousnlateral force-resisting members and shear lag behaviour. Overall, the effects of the column depth (columnndimension parallel to the frame direction) on the tube action and shear lag behaviour were more prominentnthan the other member dimensions. Copyright © 2010 John Wiley & Sons, Ltd.