Optimum Performance-Based Seismic Design Using a Hybrid Optimization Algorithm

Table 2

The statistical information of performance-based optimum designs for the 4-bay 9-story frame.

Algorithm	Hybrid CSS	PSACO [40]	PSO [40]	ACO [27]	GA [27]
Best weight (kN)	1568.66	1601.32	1682.63	1631.83	1723.1
Average weight (kN)	1626.32	1650.55	1725.36	1696.2	1791.4
Worst weight (kN)	1725.36	1759.65	1813.25	1786.94	1943.2
Std. dev. (kN)	30.35	38.52	66.35	49.33	78.33
Average number of analyses	5,000	6,000	12,500	5,600	9,700