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Advances in Acoustics and Vibration
Volume 2014 (2014), Article ID 510593, 13 pages
Research Article

Numerical Study on Energy Dissipation of Steel Moment Resisting Frames under Effect of Earthquake Vibrations

1Earthquake Engineering Group, Faculty of Civil Engineering, Semnan University, Semnan 35131-19111, Iran
2Faculty of Engineering, Islamic Azad University of Pardis, Tehran 16555-135, Iran

Received 2 September 2013; Accepted 25 November 2013; Published 13 March 2014

Academic Editor: Marc Asselineau

Copyright © 2014 Mohsen Gerami and Davood Abdollahzadeh. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In the regions near to active faults, if the fault rupture propagation is towards the site and the shear wave propagation velocity is near the velocity of fault rupture propagation, the forward directivity effect causes pulse-like long-period large-amplitude vibrations perpendicular to the fault plane which causes a large amount of energy to be imposed to structures in a short time. According to previous investigations, the amounts of input and dissipated energies in the structure represent the general performance of the structure and show the level of damage and flexibility of the structure against earthquake. Therefore, in this study, the distribution of damage in the structure height and its amount at the height of steel moment frames under the pulse-like vibrations in the near fault region has been investigated. The results of this study show that the increase rate of earthquake input energy with respect to increase in the number of stories of the structure in the near field of fault is triple that in the far field of fault which then leads to a 2–2.5 times increase in the earthquake input energy in the high rise moment frames in the near field of fault with respect to that in the far field of fault.