A Novel Integrated Optimization-Driven Design Framework for Minimum-Weight Lateral-Load Resisting Systems in Wind-Sensitive Buildings Equipped with Dynamic Vibration Absorbers

Abstract

Te increasing rate of urbanization in recent decades has resulted in a global surge in the construction of slender high-rise buildings. Tese structures are prone to excessive wind-induced lateral vibrations in the crosswind direction owing to vortex shedding efects, causing occupant discomfort and, ultimately, dynamic serviceability failure. To reconcile the worldwide accelerated trend in constructing tall buildings with the sustainable building sector agenda, this paper proposes a novel bi-objective integrated design framework that leverages dynamic vibration absorbers (DVAs) to minimize the required material usage in the wind load-resisting structural systems (WLSSs) of occupant comfort-governed tall buildings. Te framework couples structural sizing optimization for minimum-weight WLSS design (objective 1), with optimal DVA tuning for foor acceleration minimization to satisfy codifed wind comfort design requirements by using the smallest DVA inertia (objective 2). Furthermore, a versatile numerical strategy is devised for the efcient solution of the proposed bi-objective optimization problem. For illustration, the framework is applied to a 15-storey steel building equipped with one of two diferent DVAs: a widely considered top-foor tuned mass damper (TMD) and an innovative ground-foor tuned inerter damper (TID). Te derived Pareto optimal integrated (WLSS-plus-DVA) designs demonstrate that signifcant reduction in both structural steel usage and embodied carbon emissions can be achieved using either one of the two DVAs with moderate inertia. It is concluded that the proposed optimization-driven design framework and numerical solution strategy ofer an alternative innovative approach to achieve material-efcient high-rise buildings under wind hazards.