Shear capacity of ultra-high-Performance concrete I-girders with orthogonal welded wire reinforcement

G. Morcous, M. Maguire, M. K. Tadros

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

Abstract

Several studies have indicated that the shear capacity of fiber-reinforced ultra-high-performance concrete (UHPC) girders outperforms that of conventionally reinforced high-strength concrete girders. However, the extremely high material and production cost of fiber-reinforced UHPC girders limits its applications. This paper presents the experimentaland analytical investigations performed to evaluate the shear capacity and economics of using welded wire reinforcement (WWR) in place of random steel fibers in UHPC precast/prestressed I-girders. Two economical, practical, and nonproprietary UHPC mixtures that eliminate the use of steel fibers were developed and tested for their mechanical properties. Two full-scale precast/prestressed concrete girders were designed and fabricated using thedeveloped mixtures and reinforced using orthogonal WWR. The shear testing of the two girders indicated that their average shear capacity exceeds that of comparable fiber-reinforced UHPC girders while being 62% less in total material cost. In addition, the production of welded wire-reinforced UHPC girders complies with current industry practices, and eliminates handling, mixing, and consolidation challenges associated with the production of fiber-reinforced UHPC girders.

Original languageEnglish (US)
Title of host publicationThomas T. C. Hsu Symposium
Subtitle of host publicationShear and Torsion in Concrete Structures - At the ACI Fall 2009 Convention
PublisherAmerican Concrete Institute
Pages511-532
Number of pages22
Edition265 SP
ISBN (Print)9781615678280
StatePublished - 2009
EventACI Fall 2009 Convention - New Orleans, LA, United States
Duration: Nov 8 2009Nov 12 2009

Publication series

NameAmerican Concrete Institute, ACI Special Publication
Number265 SP
ISSN (Print)0193-2527

Conference

ConferenceACI Fall 2009 Convention
CountryUnited States
CityNew Orleans, LA
Period11/8/0911/12/09

Keywords

  • I-girder
  • Shear capacity
  • Steel fibers
  • Ultra-high-performance concrete
  • Welded wire reinforcement

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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