Seismic Rehabilitation of Lightly-Reinforced, Low-Rise Walls with SFRC Overlays


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Title: Seismic Rehabilitation of Lightly-Reinforced, Low-Rise Walls with SFRC Overlays

Author(s): Julian Carrillo, Sergio M. Alcocer, and Jose A. Pincheira

Publication: Special Publication

Volume: 296


Appears on pages(s): 1-16

Keywords: reinforced concrete walls, low-rise housing, lightweight concrete, seismic performance, seismic rehabilitation, seismic strengthening, shake table tests, steel fiber-reinforced concrete, toughness, epoxy injection.

Date: 3/6/2014

Earthquake simulation tests were conducted to evaluate the performance of low-rise reinforced concrete walls repaired and strengthened with steel fiber-reinforced concrete (SFRC) overlays. The dynamic response of normal-weight and lightweight concrete walls was studied under three ground motions of varying intensity to induce increasing damage levels. The performance of the rehabilitation technique was evaluated in terms of lateral strength, drift capacity, failure mode, energy dissipation and residual cracking indices. Test results show that the addition of SFRC overlays on both sides of the existing walls fully restored the displacement capacity and increased the lateral strength of the original walls.