17 - Optimum Performance-Based Seismic Design of Frames Using Metaheuristic Optimization Algorithms

Abstract

This chapter introduces metaheuristic optimization methods to the optimum seismic design of steel frames considering four performance levels. Therefore, considering multiple performance levels and optimum design of structures in order to reduce both the structural cost and the ductility demand becomes necessary. The nonlinear analysis must be done to reach the structural response at various performance levels. To fulfill this aim, a computer-based method for pushover analysis of steel building frameworks subject to equivalent-static earthquake loading is utilized. The second-order analysis methods for the optimum design of steel frame structures are very difficult problems that require a high computational cost. As a result, metaheuristics are utilized as suitable tools to find an optimum performance-based design of the frame structures. These algorithms can lead to significant improvements in the consistency and computational efficiency compared to classical methods.