Volume 15, Issue 1 (1-2025)
IJOCE 2025, 15(1): 81-96 |
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Talebpour M, Razavizade Mashizi S, Goudarzi Y. OPTIMIZATION OF SPACE STRUCTURES IN INELASTIC REGION USING FORCE ANALOGY METHOD BASED ON SHUFFLED SHEPHERD OPTIMIZATION ALGORITHM (SSOA). IJOCE 2025; 15 (1) :81-96
URL: http://ijoce.iust.ac.ir/article-1-624-en.html
URL: http://ijoce.iust.ac.ir/article-1-624-en.html
1- School of Engineering, Damghan University, Damghan, Iran
2- Department of Civil Engineering, Technical and Vocational University (TVU), Tehran, Iran
3- Department of Civil Engineering, Shahrood non-profit and non-government higher Education Institute, Shahrood, Iran
2- Department of Civil Engineering, Technical and Vocational University (TVU), Tehran, Iran
3- Department of Civil Engineering, Shahrood non-profit and non-government higher Education Institute, Shahrood, Iran
Abstract: (879 Views)
The optimization process of space structures considering the nonlinear material behavior requires significant computational efforts due to the large number of design variables and the complexities of nonlinear structural analysis. Accordingly, the Force Analogy Method (FAM) serves as an efficient tool to reduce computational workload and enhance optimization speed. In this study, the weight optimization of space structures in the inelastic region under seismic loading is carried out using the Shuffled Shepherd Optimization Algorithm (SSOA), with the nonlinear structural analysis based on the FAM. To do this, the FAM formulation for axially loaded members of space structures under seismic forces is presented. Subsequently, weight optimization is performed on two double-layer space structures: a flat double-layer structure with 200 members and a barrel vault structure with 729 members under the Kobe earthquake record. Based on the results, the optimized design using the inelastic behavior showed that the FAM provided accurate results when compared to the precise nonlinear structural analysis. The optimized design based on the FAM is considered acceptable, and the computational time for the optimization process has been significantly reduced.
Keywords: force analogy method (FAM), nonlinear analysis, shuffled shepherd optimization algorithm (SSOA), space structure
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