Amir Hosein veisi nezhad - Department of Civil Engineering, Behbahan branch, Islamic Azad University, Behbahan, Iran.
Amirodin sadrnejad - Department of Civil Engineering, K.N.T university of tehran, Iran.
Iraj Rasoolan - Department of Civil Engineering, shahid chamran university of Ahvaz, Iran

If we consider infilleds as nonstructural members, in case of a strong earthquake, these infilleds interact with the confining frame which leads to a change in the expected behavior of structure. It is very important to pay more attention to the role of the infilleds and consider them in structure design and analysis. Based on what we said, it seems necessary to have an accurate and simple analytical technique. According to this study, using a finite element software, frame and infilleds are modeled and these items are evaluated: how the infill cracks, kind of connection of beam to column, the effect of column direction and the effect of infilled thickness on the behavior of steel buildings. The results show that as the infilled thickness increases, energy dissipation will increase in the system. Also in different beam to columns connections (rigid, semi-rigid and hinge) infilled cracking is the same; however, the hinge connection has the widest crack compared to other connections.

Infilled, Cracking, Seismic Performance, Finite Elements