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| Document Name: |
97-S28 |
| Author(s): |
M. Haroun, G. Pardoen, H. Bhatia, S. Shahi, and
R. Kazanjy |
| Publication: |
Structural Journal |
| Volume: |
97 |
| Issue: |
2 |
| Keywords: |
concretes; cyclic testing; pier wall; repair;
T-headed crossties. |
| Date: |
March 1, 2000 |
Abstract:
Six 1/2-scale cantilevered pier walls were loaded in the weak direction
under cyclic loading and taken to (near) destruction. Five of the
damaged pier walls were repaired with two alternating crossties at each
crosstie location, whereas one of the damaged pier walls was repaired
with T-headed reinforcing bars in place of regular crossties. The six
repaired pier walls were retested under the same test protocol as the
original samples to compare their performance. Whereas a regular
crosstie restrains the longitudinal steel against the core, a T-headed
reinforcing bar provides confinement by the heads of the reinforcing
bars bearing directly against the concrete. This additional confinement
provides a partial explanation of why the T-headed reinforcing bars
provided better structural performance in the one repaired pier wall
than five other pier walls repaired with the crossties. The experimental
setup and the results are also presented.
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