Evaluating seismic response modification factor of steel frames with different bracing systems
by Yousef H. Al-Qaryouti; Besan Y. Alagawani
International Journal of Earthquake and Impact Engineering (IJEIE), Vol. 2, No. 3, 2018

Abstract: This paper aims to evaluate seismic response modification factor, overall ductility factor, and overstrength factor of ordinary moment steel frames with different concentrically bracing systems (X-bracing, V-bracing, and inverted V-bracing). The effects of bracing type and number of stories have been considered in the course of this study. Such factors effects on seismic parameters are not considered in seismic codes such as International Building Code (IBC, 2012) and European Standards (EN). Linear time history analysis has been performed using multiple earthquake records selected to include the variability in ground motion characteristics for 4-, 8-, 12-, and 16-story steel frame buildings. Nonlinear pushover analysis was then carried out by assigning nonlinear material behaviour and plastic hinges to steel elements according to code. It has found that each bracing system has a unique behaviour as well as different seismic parameters than other types, which are not differentiated in seismic codes such as IBC and EN. Also, it was found that the overall ductility factor, decreased with increasing the number of stories, while response modification factor (except for the inverted V-braced system) and overstrength factor increased with increasing the number of stories.

Online publication date: Wed, 25-Jul-2018

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Earthquake and Impact Engineering (IJEIE):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com