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Journal of Engineering
Volume 2017, Article ID 5284247, 10 pages
https://doi.org/10.1155/2017/5284247
Research Article

Seismic Performance of Steel Frames with Semirigid Connections

1UTM Construction Research Centre (CRC), Institute of Smart Infrastructures and Innovative Construction, Universiti Teknologi Malaysia (UTM), 81300 Skudai, Johor, Malaysia
2Institute of Structural Mechanics-Structural Analysis and Component Strength, Bauhaus University, Weimar, Germany
3Forensic Engineering Centre (FEC), Universiti Teknologi Malaysia (UTM), 81300 Skudai, Johor, Malaysia

Correspondence should be addressed to Mahmood Md. Tahir; ym.mtu@rihatdoomham

Received 2 August 2016; Revised 12 November 2016; Accepted 9 January 2017; Published 30 April 2017

Academic Editor: Kyoung Kwan Ahn

Copyright © 2017 Iman Faridmehr et al. 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.

Abstract

The nonlinear stiffness matrix method was incorporated to investigate the structural performance of steel portal frames with semirigid connections. A portal frame with unstiffened extended end-plate connection was designed to demonstrate the adequacy of the proposed method. Besides, the seismic performance of steel portal frames with semirigid connections was investigated through time history analysis where kinematic hysteresis model was assigned to semirigid connections to account for energy dissipation and unloading stiffness. Based on the results of the study, it was found that generally semirigid connections influenced the force distribution which resulted in the decrease in base shear and lighter frame compared to the rigid one. The results also indicated that there was no direct relationship between maximum displacement at the top and connection stiffness in high-rise frames.