Effectiveness of Welded Wire Fabric as Shear Reinforcement in Pretensioned Prestressed Concrete T-Beams

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Title: Effectiveness of Welded Wire Fabric as Shear Reinforcement in Pretensioned Prestressed Concrete T-Beams

Author(s): Xiaoyi XuanI, Sami Rizkalla, and Kyuichi Maruyama

Publication: Structural Journal

Volume: 85

Issue: 4

Appears on pages(s): 429-436

Keywords: beams (supports); cracking (fracturing); crack width and spacing; failure; failure mechanisms; T-beams; prestressed concrete; pretensioning; reinforcing steels; shear strength; stirrups; strains; welded wire fabric; Structural Research

Date: 7/1/1988

Abstract:
A total of six pretensioned prestressed single T-beams with identical flexural reinforcements and shear span-to-depth ratio were tested statically up to failure to investigate the effectiveness of welded wire fabric as shear reinforcement. The tested beams featured one beam without shear reinforcement and five beams with different types of shear reinforcement, including conventional double-legged stirrups, single-legged stirrups, and three different types of commercially available welded wire fabric (WWF). The results indicated that the effectiveness of WWF as shear reinforcement is the same as that of conventional stirrups under static loading conditions. It was found that using deformed WWF slightly improved the distribution of the diagonal cracks. Anchorages of WWF by means of two horizontal wires at the top and bottom are adequate according to ACI Building Code recommendations.