Abstract
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.
Highlights
Following the observation of severe damage to structurally isolated non-structural reinforced concrete (RC) walls after major earthquakes in Japan, such as the great Tohoku earthquake in 2011, researchers began to reassess the effectiveness of connection details of a non-structural wall segment to a moment-resisting frame
This study is the continuity of the former research of the authors which aimed to assess the influence of different reinforcement detailing and transverse reinforcement on the strength and drift capacity of the non-structural wall, to develop walls with higher capability
It was observed that non-anchorage of the wall longitudinal bar increases the drift capacity of the wall and limits damage
Summary
Following the observation of severe damage to structurally isolated non-structural reinforced concrete (RC) walls after major earthquakes in Japan, such as the great Tohoku earthquake in 2011, researchers began to reassess the effectiveness of connection details of a non-structural wall segment to a moment-resisting frame. This study ascertains the impact of transverse reinforcement, different connection methods longitudinal reinforcement; impact of boundary confinement on the longitudinal bars considering hanging walls with the moment-resisting frame using the anchored and non-anchored detailing of different detailing; and slenderness onboundary the performance of hanging wall against flexural load. It longitudinal reinforcement; impact of confinement on the longitudinal bars considering evaluates workability of the transvers reinforcements and reinforcement detailing with concrete. Detailing and confinement arrangement that fabricate a wall with high lateral drift capacity and strength
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