Effects of composite slab on shear strength of steel plate girders

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

Abstract

Steel plate girder bridges are often vulnerable to shear buckling at elevated fire temperatures due to their slender webs. A composite slab could be effective in increasing the shear capacity in fire, but a measure of this slab effectiveness has not been done to-date. Using nonlinear finite element models, this paper evaluates the amount of additional shear strength that a composite slab can provide to a steel plate girder under fire. The elastic shear buckling load (Vcr), (ultimate) shear post-buckling load (Vu), and stiffness are evaluated for 16 models with varying parameters: Composite slab (or not), web slenderness ratio, and stiffener spacing. The steel girders are subject to a temperature of 700°C. Results show that the composite slab increases Vcr on the order of 10% and Vu on the order of 30% compared to the non-composite models. The slab is most effective at increasing Vcr and Vu for larger stiffener spacings.

Original languageEnglish (US)
Title of host publicationComposite Construction in Steel and Concrete VIII - Proceedings of the 8th International Conference on Composite Construction in Steel and Concrete, 2017
EditorsGian Andrea Rassati, Jerome F. Hajjar, Roberto T. Leon
PublisherAmerican Institute of Steel Construction, AISC
Pages358-368
Number of pages11
ISBN (Print)9781564240620
StatePublished - 2017
Event8th International Conference on Composite Construction in Steel and Concrete, 2017 - Jackson, United States
Duration: Jul 29 2017Aug 2 2017

Publication series

NameComposite Construction in Steel and Concrete VIII - Proceedings of the 8th International Conference on Composite Construction in Steel and Concrete, 2017

Conference

Conference8th International Conference on Composite Construction in Steel and Concrete, 2017
CountryUnited States
CityJackson
Period7/29/178/2/17

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Mechanics of Materials
  • Building and Construction

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