A Timoshenko beam finite element formulation for thin-walled box girder considering inelastic buckling

S. Li, S. Benson, R.S. Dow

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

A Timoshenko beam finite element model is formulated based on the Lagrange and Hermitian interpolations, in which the transverse shear deformation is explicitly evaluated. To account for the local inelastic buckling, the finite element formulation is coupled with a Smith-type progressive collapse method where the nonlinear responses of local structural members can be assessed. The effect of shear lag is accounted by an effective breadth theory. This coupled model enables an efficient prediction of the flexural behaviour of a thin-walled box girder under lateral loading. To demonstrate its capability, a case study is completed on a single-skin box girder under four-point bending. Equivalent finite shell element analysis is carried out for validation. The proposed method shows a close correlation with the shell element model in both strength and stiffness predictions. It is found that the effect of shear lag is significant in this case study, which substantially reduces the stiffness of the box girder.
Original languageEnglish
Title of host publication Developments in the Analysis and Design of Marine Structures
EditorsJ. Amdahl, C. Guedes Soares
Place of PublicationLondon
Number of pages11
ISBN (Electronic)9781003230373
Publication statusE-pub ahead of print - 29 Dec 2021
Event8th International Conference on Marine Structures - Virtual, Trondheim, Norway
Duration: 7 Jun 20219 Jun 2021
http://www.marstruct-vi.com/marstruct2021/

Conference

Conference8th International Conference on Marine Structures
Abbreviated titleMARSTRUCT 2021
Country/TerritoryNorway
CityTrondheim
Period7/06/219/06/21
Internet address

Keywords

  • Timoshenko beam
  • finite element (FE) formulation
  • thin-walled box girder
  • inelastic buckling

Fingerprint

Dive into the research topics of 'A Timoshenko beam finite element formulation for thin-walled box girder considering inelastic buckling'. Together they form a unique fingerprint.

Cite this