Improvement of Seismic Performance of Seven Story Steel Building with Hysteretic Steel Dampers Under Severe Seismic Excitation (original) (raw)

2013

Abstract

ABSTRACT The uses of supplementary hysteretic steel dampers have been recognized as effective and inexpensive techniques to reduce seismic responses of structural systems induced by a major earthquake. During a large earthquake event, these dampers will absorb the earthquake input energy to the structure through hysteretic behavior of its elements, where the main members are designed to remain elastic and/or within low inelastic deformation. The purpose of this paper is to study the effectiveness of the hysteretic dampers improving the structural performance of a steel building subjected to a major earthquake excitation. To do this, seven story's steel building with and without hysteretic steel dampers are investigated using non-linier dynamic time history analysis under a set of selected ground motion records. The ground motions are matched to the response spectrum design of the National Indonesian Standard of seismic hazard map. In this study, hysteretic steel dampers are applied with various stiffness ratio values in the steel bracing of the Chevron types configurations. To quantify the structure's performance, a damage indicator derived from the energy damage model is introduced and evaluated. Finally, the seismic performance of the building with and without hysteretic steel dampers are discussed and compared.

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