Gholamreza Godrati Amiri - Professor, Department of Civil Engineering, Iran University of Science and Technology
Naeem Khoshnevis - Earthquake engineering graduate student, Iran University of Science and Technology
Kazem Shakeri - Assistant Professor, Department of engineering, University of Mohaghegh Ardabili
Reza Afzal Soltani - MSc student, International institute of earthquake engineering and seismology

There are two approaches to the seismic risk assessment of an area. In the first one, known as the what if scenario, the current situation can be evaluated. In the second approach the vulnerability of not yet constructed structure in an area may be evaluated. Only after estimating the safety, performance, and economic considerations, may the construction begin. Since the building area covered by steel structures is approximately six times greater than that covered by RC structures in Tehran, In this paper the vulnerability of a 7-floor steel moment frame building, designed according to standard 2800 in different regions of Tehran, will be evaluated. For each type of soil, PGA, spectral acceleration Sa at 0.3 s (Sa0.3), and Sa at 1 s (Sa1.0) will be reached from a probabilistic analysis of the standard 2800. SELENA ver. 5.0 software has been employed for seismic risk assessment, and the results have been displayed through ArcGIS software

Seismic risk assessment, Tehran, Hazard U.S, standard 2800, steel moment frames