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Nonlinear analysis for PC box-girder with corrugated steel webs under pure torsion

Authors
Journal
Thin-Walled Structures
0263-8231
Publisher
Elsevier
Publication Date
Volume
51
Identifiers
DOI: 10.1016/j.tws.2011.10.013
Keywords
  • Corrugated Steel Webs
  • Finite Element Method
  • Nonlinear
  • Pure Torsion
  • Torsional Strength

Abstract

Abstract A three dimensional finite element model of PC box-girder with corrugated steel webs taking material nonlinearity into consideration is established to investigate the behavior under pure torsion. The torque–twist curves and ultimate torsional strength predicted by FEM show good agreement with test data. Results obtained from finite element model indicate that specimens go through three stages subjected to pure torsion and the shear flow in concrete top or bottom flange is not equal to that in corrugated steel webs. Parametric study is carried out including effect of corrugation, effect of thickness of web, effect of strength of concrete, and effect of prestressed tendons. It is shown that the ultimate torsional strength of specimens is in linear proportion to shear modulus and thickness of corrugated steel webs and to compressive strength of concrete.

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