Title:
Flexural Shear and Ledge Reinforcement in Reinforced Concrete Inverted T-Girders
Author(s):
S. A. Mirza, R. W. Furlong, and J. S. Ma
Publication:
Structural Journal
Volume:
85
Issue:
5
Appears on pages(s):
509-520
Keywords:
bentcaps (supports); brackets; bridges (structures); flanges; flexure; ledges; reinforced concrete; reinforcement details; shear; stirrups; T-beams; Structural Research
DOI:
10.14359/2790
Date:
9/1/1989
Abstract:
Reinforced concrete beams with an inverted T cross section are frequently used as bentcap girders to support precast stringers. Reinforcement for the flanges of the T presents special problems regarding the shear strength, the anchorage of the bars, and flexural behavior in the flange. The behavior of reinforced concrete inverted T-beams was observed in six test specimens; each specimen was subjected to several different patterns of load applied to the bracket formed by the arms of the inverted T cross section. Two specimens were constructed with a cross section the same size as that of the bentcap girders commonly employed in highway bridge construction, and four specimens were constructed to one-third the scale of actual highway bridge structures. The full-scale specimens were used primarily to study the reinforcement used in the bracket of the inverted T-beams. One-third scale specimens were useful both for studies of bracket reinforcement and for web shear in the stem of the inverted T cross section. Results provide advice for reinforcement applicable to the flanges as well as to the web shear strength of such beams.