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Open AccessArticle

Impact of the Reinforcement Detailing on Seismic Performance of Isolated Non-structural Walls

1
Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
2
Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8603, Japan
3
Earthquake Research Institute, The University of Tokyo, Bunkyo-ku 113-0032, Japan
4
Graduate School of Engineering, Osaka University, Suita 565-0871, Japan
5
Building Research institute, Tsukuba 305-0802, Japan
*
Author to whom correspondence should be addressed.
Buildings 2020, 10(5), 89; https://doi.org/10.3390/buildings10050089
Received: 12 April 2020 / Revised: 30 April 2020 / Accepted: 2 May 2020 / Published: 7 May 2020
Following the observation of severe damage to structurally isolated non-structural reinforced concrete walls after major earthquakes, researchers began to reassess the effectiveness and connection detail of non-structural walls to moment-resisting frames. A method to control damages to the non-structural wall, is to cast exterior non-structural concrete wall elements to be monolithic with frame elements, without anchoring the wall longitudinal bar. The non-anchorage of the wall longitudinal bar significantly increases the drift capacity of the wall and decreases damage. Using an experimental approach, this study assesses the influence of reinforcement detailing and quantity of the transverse reinforcements on the strength and drift capacity of the non-structural hanging wall. This study further evaluates the workability mechanism of the transverse reinforcements and reinforcement detailing with concrete. The non-anchorage of hanging walls, having boundary confinements, was found to exhibit a higher drift and strength capacity than similar walls with the anchored detailing without boundary confinements. The strength capacity of the anchored detailing hanging walls with minimum amounts of reinforcements was higher than that of the non-anchored specimen. The boundary confinements were found to be more influential on the capability of the hanging wall when placed along with non-anchored detailing reinforcement. View Full-Text
Keywords: non-structural wall; flexural strength; drift capacity; boundary confinement; transverse reinforcement; seismic design non-structural wall; flexural strength; drift capacity; boundary confinement; transverse reinforcement; seismic design
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Safi, W.A.; Hibino, Y.; Kusunoki, K.; Sanada, Y.; Mukai, T. Impact of the Reinforcement Detailing on Seismic Performance of Isolated Non-structural Walls. Buildings 2020, 10, 89.

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