seismic risk assessment of 7 floors steel moment frame structure based on the standard 2800 of iran in tehran

 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.