TY - JOUR
T1 - Residual seismic performance of damaged reinforced concrete walls
AU - Al Washali, Hamood Ahmed Hamood
AU - Maeda, Masaki
AU - Ogata, Yoshihiro
AU - Aizawa, Naoyuki
AU - Tsurugai, Kazuya
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/9/15
Y1 - 2021/9/15
N2 - Structural engineers face a dilemma in assessing the residual seismic capacity of damaged buildings after an earthquake, especially for buildings with lightly to moderately damaged elements that might not need repair but require to be assessed for their performance in aftershocks and future major earthquakes. The main purpose of this paper is to investigate the influence of pre-damage levels on residual seismic capacity of reinforced concrete (RC) wall tests, by conducting quasi-static, cyclic loading tests of reinforced concrete shear walls. A comparison of the reduction in stiffness, deformation capacity, and strength to existing guidelines regarding residual seismic evaluation is investigated. This study presents experimental results of eleven ¼ scaled RC wall tests that were divided into three series based on the wall reinforcement ratio and the shape of the wall boundary elements. Within each series, the effect of four levels of initial damage on the wall performance was investigated. The specimens were designed to fail in shear to represent the shear walls in Onagawa nuclear power plant buildings in Japan. The results showed that no significant deterioration in ultimate strength and maximum deformation capacity due to slight to severe previous damage. RC walls with flange boundary elements had relatively greater stiffness degradation due to prior damage than walls with boundary columns.
AB - Structural engineers face a dilemma in assessing the residual seismic capacity of damaged buildings after an earthquake, especially for buildings with lightly to moderately damaged elements that might not need repair but require to be assessed for their performance in aftershocks and future major earthquakes. The main purpose of this paper is to investigate the influence of pre-damage levels on residual seismic capacity of reinforced concrete (RC) wall tests, by conducting quasi-static, cyclic loading tests of reinforced concrete shear walls. A comparison of the reduction in stiffness, deformation capacity, and strength to existing guidelines regarding residual seismic evaluation is investigated. This study presents experimental results of eleven ¼ scaled RC wall tests that were divided into three series based on the wall reinforcement ratio and the shape of the wall boundary elements. Within each series, the effect of four levels of initial damage on the wall performance was investigated. The specimens were designed to fail in shear to represent the shear walls in Onagawa nuclear power plant buildings in Japan. The results showed that no significant deterioration in ultimate strength and maximum deformation capacity due to slight to severe previous damage. RC walls with flange boundary elements had relatively greater stiffness degradation due to prior damage than walls with boundary columns.
KW - Earthquake damage
KW - Nuclear power plant
KW - Prior damage
KW - Residual seismic capacity
KW - Squat RC walls
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U2 - 10.1016/j.engstruct.2021.112673
DO - 10.1016/j.engstruct.2021.112673
M3 - Article
AN - SCOPUS:85107802948
VL - 243
JO - Structural Engineering Review
JF - Structural Engineering Review
SN - 0141-0296
M1 - 112673
ER -