Optimization of steel moment frames with panel-zone design using an adaptive differential evolution

  • Viet-Hung Truong Faculty of Civil Engineering, Thuyloi University, 175 Tay Son street, Dong Da district, Hanoi, Vietnam https://orcid.org/0000-0002-1109-7667
  • Ha Manh Hung Faculty of Building and Industrial Construction, National University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
  • Pham Hoang Anh Faculty of Building and Industrial Construction, National University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
  • Tran Duc Hoc Department of Construction Engineering and Management, Ho Chi Minh City University of Technology, Vietnam National University - HCMC, 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam

Abstract

Optimization of steel moment frames has been widely studied in the literature without considering shear deformation of panel-zones which is well-known to decrease the load-carrying capacity and increase the drift of structures. In this paper, a robust method for optimizing steel moment frames is developed in which the panel-zone design is considered by using doubler plates. The objective function is the total cost of beams, columns, and panel-zone reinforcement. The strength and serviceability constraints are evaluated by using a direct design method to capture the nonlinear inelastic behaviors of the structure. An adaptive differential evolution algorithm is developed for this optimization problem. The new algorithm is featured by a self-adaptive mutation strategy based on the p-best method to enhance the balance between global and local searches. A five-bay five-story steel moment frame subjected to several load combinations is studied to demonstrate the efficiency of the proposed method. The numerical results also show that panel-zone design should be included in the optimization process to yield more reasonable optimum designs.

Keywords:

direct design; differential evolution; optimization; panel-zone; steel frame.

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Published
17-04-2020
How to Cite
Truong, V.-H., Hung, H. M., Anh, P. H., & Hoc, T. D. (2020). Optimization of steel moment frames with panel-zone design using an adaptive differential evolution. Journal of Science and Technology in Civil Engineering (STCE) - NUCE, 14(2), 65-75. https://doi.org/10.31814/stce.nuce2020-14(2)-06
Section
Research Papers