Experimental Evaluation of Alternative Low Damange Solutions for Reinforced Concrete Walls
Four half-scale concrete walls with different low damage solutions are currently being tested at the University of Auckland, New Zealand. Low damage alternatives were selected based on literature review and discussion with industry professionals. The first wall has debonded reinforcement encased in steel tubing extended into the foundation, which is intended to trigger a crack at the wall base and distribute the reinforcement strain across the debonded length. In the second wall, steel fiber-reinforced concrete is substituted for conventional concrete throughout the wall, which should allow for increased tensile strain hardening and confinement, but is expected to be lesser when compared to ECC. In the third and fourth wall, ECC is substituted for conventional concrete in the plastic hinge region, which will increase the tensile capacity of the wall and delay deterioration in the hinge region. Higher axial load will be applied to the fourth wall relative to the third to observe the impact fibers have on confinement.
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