It is well known that the weight of the structural system for a high-rise building to resist lateral loads increases in nonlinear fashion with increase in building height and slenderness ratio. For a given building height or slenderness ratio, the weight of the structural system for a high-rise building subjected to lateral loads depends on the degree of stiffness of the building structure. Therefore, at the final stage of the structural design process, it has been a challenge to structural engineers to improve the efficiency of a structural system by either minimizing the weight of a structure for a given limit on lateral displacement or maximizing the degree of stiffness for a given weight of a structure. In this paper, a resizing design method that can minimize the magnitudes of lateral displacement and inter-story drift of a high-rise building with respect to structural weights is presented. Based on the proposed design method, the relation between the structural weight and the magnitude of lateral displacement is investigated using two examples, including a 60-story high-rise building.1 1According to Equations (4) and (5), the sectional properties of members in the groups are modified and the displacement to be designed is minimized.
APPLICATION TO DRIFT DESIGN OF HIGH-RISE BUILDINGSBy combining the strength design module and the drift design method using resizing algorithms with the structural weight control factors, the drift design model of high-rise buildings proposed in this paper is shown in Figure 1. Using the model, a high-rise building can be designed in three steps. In the first step, the group displacement participation factors in Equation (1) are calculated using a preliminary design satisfying the strength requirements based on design specifications. If the calculated 566 J. H. SEO ET AL.
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