Mahmoud Miri and Abdolreza Zare and Hossein Abbas zadeh
Seismic Behaviour of Steel Frames Investigation with Knee Brace Based on Pushover Analysis
122 - 128
2009
3
2
International Journal of Civil and Environmental Engineering
https://publications.waset.org/pdf/12482
https://publications.waset.org/vol/26
World Academy of Science, Engineering and Technology
The knee bracing steel frame (KBF) is a new kind of energy dissipating frame, which combines excellent ductility and lateral stiffness. In this framing system, a special form of diagonal brace connected to a knee element instead of beamcolumn joint, is investigated. Recently, a similar system was proposed and named as chevron knee bracing system (CKB) which in comparison with the former system has a better energy absorption characteristic and at the same time retains the elastic nature of the structures. Knee bracing can provide a stiffer bracing system but reduces the ductility of the steel frame. Chevron knee bracing can be employed to provide the desired ductility level for a design. In this article, relation between seismic performance and structural parameters of the two above mentioned systems are investigated and compared. Frames with similar dimensions but various heights in both systems are designed according to Iranian code of practice for seismic resistant design of building, and then based on a nonlinear push over static analysis; the seismic parameters such as behavior factor and performance levels are compared.
Open Science Index 26, 2009