Haider Ali Abass
Husain Khalaf Jarallah
Abstract
Seismic evaluation, an important way to validate the buildings to resist earthquake loads. In relevance, buildings can be divided into primary and secondary elements. The primary elements include the structural elements, while the secondary involve the non-structural elements. The comparative between ATC-40, FEMA-356 and FEMA-440 were investigated in the present study. The case study was introduced in this study of Thalassemia Center Hospital Building located at Baghdad, Iraq. The study conducted by using Iraqi Seismic Code (ISC-2017) response spectrum. The comparison of the results between the evaluation codes was carried out in terms of capacity curves and performance level. The comparison's results drew attention to important points. The results of the CSM method according to ATC-40 and an improved equivalent linearization procedure adopted by FEMA-440 differed because the equivalent linearization procedure relied on new expressions to assess effective period and effective damping. The results improved that the values of spectral response acceleration according to ISC-2017 were adequate and appropriate to use in the seismic analysis and design. Accordingly, it can be considered that the capacity spectrum method (CSM) based on FEMA440 produces results that are very conservative, whereas those obtained with the ATC-40 are invariably underestimated.
Keywords
Pushover Analysis, Moment-Curvature Analysis, Response Spectrum, Iraqi Seismic Code, Capacity Curves, Plastic Hinge.
