Evolutionary Multiobjective Optimization of Steel Structural Systems in Tall Buildings

This paper presents results of extensive computational experiments in which evolutionary multiobjective algorithms were used to find Pareto-optimal solutions to a complex structural design problem. In particular, Strength-Pareto Evolutionary Algorithm 2 (SPEA2) was combined with a mathematical programming method to find optimal designs of steel structural systems in tall buildings with respect to two objectives (both minimized): the total weight and the maximum horizontal displacement of a tall building. SPEA2 was employed to determine Pareto-optimal topologies of structural members (topology optimization) whose cross-sections were subsequently optimized by the mathematical programming method (sizing optimization). The paper also presents the shape of the Pareto front in this two-dimensional objective space and discusses its dependence on the building's aspect ratio. The results reported provide both qualitative and quantitative knowledge regarding the relationship between the two...

• Type: Conference
• Year: 2006
• Where: EMO
• Authors: Rafal Kicinger, Shigeru Obayashi, Tomasz Arciszewski
• Keywords: EMO 2006, Mathematical Programming Method, Optimization, Structural, Tall Buildings