Energy Distribution in Stories of Concentrically Braced Frames (CBFs) nder Far Field and ear Field Records
Message:
Abstract:
Different researches show that during an earthquake, the seismic input energy of structures strongly affects the seismic destructive which foresight them completely is not possible only by strength nonlinear response spectrum or drift methods. Because of the recent studies show that energy concepts be able to explain about all effective parameters on seismic behavior of structures, therefore in some recent decades, energy balance idea in structures was considered by optimum distribution of damage in structures. Since almost all structures will have nonlinear behavior under strong ground motions, therefore study on such behavior of structures is necessary. Purpose of this paper is assessment of damage distribution quality, drift and hysteretic energy in stories of concentrically braced frames which have designed based on Iranian Earthquake Code No. 2800 (Third Edition). The results show that the maximum stories drift and the ratio of hysteretic energy to input energy under near field to far field records have been increased to two and three times, respectively and despite of uniform distribution of strength in frames height, damage and hysteric energy distribution's diagrams are not uniform and centralization of energy and damage are indicated in first story, which with increasing the number of stories, this centralization is decreased and it appear the more uniform distribution of this energy in frames height.
Language:
Persian
Published:
Journal of Structure & Steel, Volume:4 Issue: 6, 2010
Page:
31
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