Abstract
Abstract According to the conditions of today's world, design of resistant structures against blast loading is an important subject that requires special attention. Thus, given the benefits of optimization in engineering, development and assessment of optimization methods for optimum design of structures against blast is of great importance. In this research, the optimum design of steel frame structures against blast loading is investigated. For this purpose first an optimization methodology is proposed. In the proposed method the structural analysis is performed using nonlinear explicit finite element analysis. Based on the proposed method a framework is developed and three numerical examples are investigated using different numerical optimization techniques. Results of this study show that by using nonlinear explicit FE analysis as the structural analysis method and NLPQLP optimization technique as the optimization method, the current optimization problem can be performed effectively, because the procedure is relatively accurate and computationally inexpensive.
Highlights
In today’s world, terrorist attacks and wars are phenomena which threaten human security all over the world
Total execution time for performing the optimization process using NLPQLP technique is 79% lower than the execution time required for Particle Swarm Optimization (PSO) and 77% lower than the execution time required for Multi Island Genetic Algorithm (MIGA)
Based on the proposed method a framework was developed and three numerical optimization techniques were investigated through the numerical examples
Summary
In today’s world, terrorist attacks and wars are phenomena which threaten human security all over the world. Nassr et al (2012) modeled steel beam and beam-columns against blast load using single and multi-degree of freedom models They conducted an experimental study to evaluate responses of some wide flange beams subjected to blast. Some of the important researches have carried out on the optimization of steel structures in recent years are as follows: Degertekin (2012) studied the optimum design of geometrically nonlinear steel frames using artificial bee colony algorithm (ABC). A three story building was studied as a numerical example They concluded that the proposed method is an efficient method for designing steel frames under seismic loadings. The main purpose of the present study is to compare the efficiency of the three optimization techniques for optimum design of steel moment frames under blast, based on a proposed procedure
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