An integrated method for sustainable performance-based optimal seismic design of RC frames with non-prismatic beams

In the performance-based optimal seismic design, one attempts to obtain structural design variables to meet the minimum objective function satisfying the strengthbased and performance-based constraints. A limited number of studies have been conducted on the performance-based optimal seismic design of Reinforced Concrete (RC) frames. On the other hand, due to the significance of environmental impacts, further study on the design of RC buildings aiming at reducing CO2 emissions is required. In this study, a computational procedure is developed for performance-based optimal seismic design of RC frames with prismatic beams and frames with non-prismatic beams. The objective functions consist of minimizing the cost and CO2 emissions. Nonlinear pushover analysis was performed to analyze the frames. The described procedure was then applied to a fourstory RC frame, and the relationship between optimal cost and optimal CO2 emissions was investigated in the case of frames with prismatic beams and those with non-prismatic beams.