Seismic Damage and Behavior Assessment of Drift-Hardening Concrete Walls Reinforced by LBUHS Bars
Jiayu Che, Bunka Son, Yuping Sun
TL;DR
This study examines how concrete walls reinforced with special high-strength bars behave during seismic events, showing improved performance and repairability.
Contribution
The study introduces drift-hardening concrete walls reinforced with LBUHS bars, demonstrating enhanced seismic performance and repairability.
Findings
Test walls with LBUHS bars showed drift-hardening capability up to 2.0% drift ratio.
Concrete's maximum strain capacity reached 0.86%, exceeding current recommendations.
Residual drift ratios remained below 0.4%, indicating high repairability.
Abstract
This paper experimentally and analytically investigated the damage and seismic behavior of concrete walls reinforced by low-bond ultra-high-strength (LBUHS) bars. To this end, four half-scale rectangular concrete walls were fabricated and tested under reversed cyclic loading and constant axial compression. The test variables were the shear span ratio and the axial load ratio. Based on the test results, the propagation of cracks on the wall surface, the maximum strain capacity of concrete, the hysteresis loops and envelope curves, the residual drifts, and the strain distributions of LBUHS rebars were presented and discussed. The experimental results showed that all the test walls could exhibit drift-hardening capability until at least a 2.0% drift ratio if LBUHS rebars were anchored by nuts at their ends. The test results also indicated that the maximum strain capacity of concrete was…
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Taxonomy
TopicsStructural Behavior of Reinforced Concrete · Structural Response to Dynamic Loads · Seismic Performance and Analysis