Optimum location of a single longitudinal stiffener with various cross-section shapes of steel plate girders under bending loading

  • George Papazafeiropoulos Department of Structural Engineering, National Technical University of Athens, Zografou, Athens 15780, Greece
  • Quang-Viet Vu Faculty of Civil Engineering, Vietnam Maritime University, 484 Lach Tray street, Le Chan district, Hai Phong city, Vietnam
  • Viet-Son Nguyen State Authority for Construction Quality Inspection, Ministry of Construction, 37 Le Dai Hanh street, Hai Ba Trung district, Hanoi, Vietnam
  • Viet-Hung Truong Faculty of Civil Engineering, Thuy Loi University, 175 Tay Son street, Dong Da district, Hanoi, Vietnam https://orcid.org/0000-0002-1109-7667
Keywords: optimum stiffener position, stiffener cross-section, optimization, Abaqus2Matlab, steel plate girders

Abstract

This paper aims at investigating the optimum location of a single longitudinal stiffener having various cross-section types of steel plate girders subjected to bending loading. The optimum location is found using a gradient-based Interior-Point (IP) optimization algorithm. The optimization procedure involves a linear elastic buckling analysis with the finite element method, which is coupled with the aforementioned IP algorithm and used to calculate the buckling coefficient, which is maximized. Based on the optimization results, the effect of the various cross-section types of the stiffener and the web slenderness ratio on the optimum stiffener position is investigated. It is found that closed cross-sections of the stiffener and larger web slenderness ratios lead to higher critical buckling coefficients.

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Published
01-04-2022
How to Cite
Papazafeiropoulos, G., Vu, Q.-V., Nguyen, V.-S., & Truong, V.-H. (2022). Optimum location of a single longitudinal stiffener with various cross-section shapes of steel plate girders under bending loading. Journal of Science and Technology in Civil Engineering (STCE) - HUCE, 16(2), 65-75. https://doi.org/10.31814/stce.huce(nuce)2022-16(2)-06
Section
Research Papers