A new Evolutionary Structural Optimization method and application for aided design to reinforced concrete components
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RESEARCH PAPER
A new Evolutionary Structural Optimization method and application for aided design to reinforced concrete components Leijia Wang 1 & Huzhi Zhang 1,2 & Mingqiao Zhu 1 & Y. Frank Chen 3 Received: 13 August 2019 / Revised: 5 April 2020 / Accepted: 6 May 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The Evolutionary Structural Optimization (ESO) has been applied to find the optimal structural topology for design and construction purposes. However, its efficiency is low due to the imperfect deletion criteria. This paper presents an improved elimination criterion and the Windowed Evolutionary Structural Optimization (WESO) method. The former considers the structural average strain energy as the elimination criteria in the optimization, with the elimination rate set as a self-adaption state by an adjustable window. Thus, the problems of low optimization efficiency and distorted optimization results in the traditional ESO can be solved to a certain extent. The WESO method can then be extended and applied with a complex finite element model. It is found that the method has better optimal ability in handling discrete elements in vast structures. Compared with the other method, the WESO method has high computational efficiency and offers more stable and reliable topology than the Michell theoretical solution. Lastly, upon developing the optimal topology for a double-deck structure, it is shown that the WESO method has a great potential in civil engineering applications. Keywords Structural optimization . Topology optimization . Evolutionary Structural Optimization method . Computational efficiency . Windowed
1 Introduction Structural optimization can achieve the minimum material utilization and the lowest cost for a structural design. It has gained increasing popularity. Traditional structural optimizations focus on size optimization during the construction design stage, resulting in limited construction improvement (Grierson and Khajehpour 2002). Structure topology optimization finds the optimal distribution of material components of an object in continuous space (Eschenauer and Olhoff 2001).
Responsible Editor: Emilio Carlos Nelli Silva * Huzhi Zhang [email protected] 1
School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
2
Hunan Provincial Key Laboratory of Structures for Wind Resistance and Vibration Control, Hunan University of Science and Technology, Xiangtan 411201, China
3
Department of Civil Engineering, The Pennsylvania State University, Middletown, PA 17057, USA
It has received extensive attention from scholars and engineers. Because it does not rely on the initial configuration and the experience from an engineer, a completely unexpected and innovative configuration can be obtained. In the continuum structure topology optimization method, the Evolutionary Structural Optimization (ESO) method based on the evolutionary thought is deemed most matured (Xie and Steven 1993). In the continuum structure topology optimizatio
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