Evolutionary Structural Optimization (E.S.O) Method

Evolutionary Structural Optimization1. A load transfer mechanism is obtained by eliminating the finite elements (that are negligible in transferring load) with performance- and topology-based optimization techniques.2. It is impractical to implement since the techniques require numerous iterative eliminations and a numerical model consisting of a great number of elements.3. The strut-tie models selected are generally determinate truss structures inducing difficulties in terms of practical horizontal and/or vertical placements of reinforcing bars and congestions of reinforcing bars due to concentrated tensile forces of steel ties. Furthermore, a simple determinate truss structure causes difficulties in reflecting the actual structural behavior in design.
Procedure of ESO

ESO Example

Design Procedure of Strut-Tie Model Approach using ESO

ReferenceChoi, C. Y. (2005) Decision of Strut-Tie Models using Evolutionary Structural Optimization, Master’s Thesis, Kyungpook National University, Daegu, South Korea (in Korean).Lee, W. S. (2006) Strut-Tie Model Approach using Evolutionary Structural Optimization for Reinforced Concrete Structural Members, Ph. D Dissertation, Kyungpook National University, Daegu, South Korea (in Korean).