Title: Crack propagation control for a pre-stressed concrete beam utilising coupled sensitivity indices-Pareto optimisation method

Authors: Nazim Abdul Nariman

Addresses: Department of Civil Engineering, Faculty of Engineering, Tishk International University, Qularaisi, 46001, Sulaymaniyah, Kurdistan Region, Iraq

Abstract: A coupled Sobol's sensitivity indices and Pareto optimisation method was dedicated to determine an optimum prediction model of a pre-stressed concrete beam to control the crack propagation. Five variables were deployed which belong to the mechanical properties of the concrete and the reinforcement steel bars in addition to the pre-stressing one. The Box-Behnken sampling method was used with numerical simulations by ABAQUS program and the support of MATLAB codes. The pre-stressing variable manifested the greatest influence on the crack propagation compared to the rest variables. Furthermore, the optimised values of all variables produced the minimum tensile damage 0.164 compared to the three cases of the highest total sensitivity indices of pre-stressing variable which were 0.946, 0.788, and 0.631 respectively. Consequently, the coupled method confirmed excellent efficiency in creating a robust tool to control the crack propagation and predict the behaviour of the structural system to an outstanding accuracy.

Keywords: tendon; concrete damage plasticity; main impact; interaction impact; objective function; ABAQUS.

DOI: 10.1504/IJHM.2024.143184

International Journal of Hydromechatronics, 2024 Vol.7 No.4, pp.328 - 346

Received: 06 Oct 2023
Accepted: 02 Feb 2024
Published online: 06 Dec 2024 *

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