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Title: Crack Width Prediction Using Compatibility-Aided Strut-and-Tie Model

Author(s): Ronnie R. H. Zhu, Wirat Wanichakorn, Thomas T. C. Hsu, and John Vogel

Publication: Structural Journal

Volume: 100

Issue: 4

Appears on pages(s): 413-421

Keywords: bent caps; cracking; reinforced concrete.

DOI: 10.14359/12649

Date: 7/1/2003

Abstract:
Unacceptable diagonal cracks frequently occur at service load in the vicinity of the re-entrant corners in structures such as the dapped ends of bridge girders and the ledges of inverted T bent caps. Such diagonal cracks are not only visually intimidating but also impose a potential danger of corrosion of reinforcing bars. Controlling such cracking is difficult due to the lack of a rational theory for crack prediction. In this paper, a compatibility-aided strut-and-tie model (CASTM) is proposed for predicting the diagonal crack widths at re-entrant corners. The validity of this model is supported by tests of seven full-scale specimens.