Structural Engineering and Mechanics

  • 제80권1호
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  • Pages.27-36
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  • 2021
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Effects of longitudinal and transverse curvatures on optimal design of shell footbridge

  • Liu, Shiming (School of Civil Engineering and Communication, North China University of Water Resources and Electric Power) ;
  • Huang, Bin (School of Civil Engineering and Communication, North China University of Water Resources and Electric Power) ;
  • Xie, Yi Min (Centre for Innovative Structures and Materials, School of Engineering, RMIT University)
  • 투고 : 2021.03.26
  • 심사 : 2021.07.15
  • 발행 : 2021.10.10
⟨ 이전 논문 다음 논문 ⟩

초록

Shell bridges have attracted extensive interest in engineering research and practice. This paper aims to evaluate the effects of longitudinal and transverse curvatures on the optimal design of the shell bridge. For this purpose, a slant-legged steel shell footbridge with the same initial and target volumes of steel was chosen to build parametric geometric models with different curvature radii, and then topology optimization was carried out using the bi-directional evolutionary structural optimization (BESO) technique to obtain optimized designs with high structural stiffness. Furthermore, linear static analysis and eigenvalue analysis demonstrate that the displacement, von Mises effective stress, and the first-order vertical vibration frequency satisfied all the requirements of design regulations. Numerical results indicate that not only the longitudinal curvature but also the transverse curvature have a significant effect on the optimized designs of steel shell footbridge. While the mean compliance increased with the transverse curvature radius, it first decreased and then increased with the longitudinal curvature radius.

키워드

과제정보

This study was funded by the National Natural Science Foundation of China (51508189) and the China Scholarship Council (201808410438).

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