Parameter Estimation for a System of Beams Resting on Stone Column–Reinforced Soft Soil

Abstract

The paper pertains to the development of a methodology for the identification of optimal design parameters for a system of beams resting on a stone column–improved soft soil. The simulation optimization–based methodology combines a finite difference–based simulation model and an evolutionary multiobjective optimization model. Two different formulations subjected to stress constraints have been incorporated within the methodology; i.e., (1) minimization of settlement at the center of the beam and minimization of the maximum bending moment and (2) minimization of settlement at the center of the beam and minimization of the maximum shear force. Critical evaluation of an illustrative system shows that stiffness of the stone columns or modular ratio and flexural rigidity of the beam are the most important parameters for optimal design. The obtained results also show the potential applicability of the proposed simulation optimization–based methodology.