Centrifuge Modelling Influence of Various Integration Schemes of Retaining Walls on Seismic Behaviour Using Tilting Table Test

Sano, Kazuya; Itoh, Kazuya; Tanaka, Tsuyoshi; Suemasa, Naoaki; Konami, Takeharu

doi:10.1007/978-981-16-0077-7_23

Cited by 1 publication

(2 citation statements)

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“…which was used in a number of centrifuge experiments conducted on embankments and retaining wall systems. Sano et al 39 . conducted geotechnical centrifuge tilting table experiments to determine the seismic resistance of a dry masonry retaining wall retrofitted with vertical reinforcement.…”

Section: Tilting Table Experimentsmentioning

confidence: 99%

“…Previously, a tilting table that could be mounted on an existing geotechnical centrifuge platform was developed by Izawa et al 37 and Nakamoto et al 38 which was used in a number of centrifuge experiments conducted on embankments and retaining wall systems. Sano et al 39 conducted geotechnical centrifuge tilting table experiments to determine the seismic resistance of a dry masonry retaining wall retrofitted with vertical reinforcement. Based on the centrifuge experiments, they concluded the increased seismic resistance of the dry masonry retaining wall system with vertical reinforcement as compared to an experimental case which was performed without any countermeasure.…”

Section: Tilting Table Experimentsmentioning

confidence: 99%

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Novel performance‐based seismic reinforcement method for the dry masonry retaining wall located in an urban residential area

Sano,

Sahare,

Itoh

et al. 2024

Earthq Engng Struct Dyn

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In Japan, recently there has been an increase in the failure of dry masonry retaining walls located in an urban residential area due to strong earthquakes. However, currently there are no established optimal seismic reinforcement methods for such dry masonry retaining walls due to issues related to workability and construction cost. This paper presents a novel reinforcement method wherein the tilting reinforcement bars were installed from top of the retaining wall whose individual blocks were integrated. A detailed investigation and discussion on the mechanical behavior of a dry masonry retaining wall is made by comparing the results among different experimental cases which had different seismic reinforcement treatment with the help of tilting table experiments conducted in a geotechnical centrifuge. The results highlighted that the proposed method, the application of tilting reinforcement bars together with the integration of individual wall blocks, led to the best seismic resilient performance of the retaining wall with the least measured soil deformations and soil strains at the backfill. Among all the tested cases, the proposed method resulted in the least mobilization of axial force and bending moment at the top of reinforcement bars which may result in the overall reduction of the construction cost (i.e., by reducing the number of reinforcement bars) aiming toward a performance‐based design. Lastly, an analytical evaluation of the factor of safety (FOS) against collapse as per the Mononobe‐Okabe theory was made which was found to be in excellent agreement with the centrifuge experiments revealing the proposed method to perform best among all the cases.

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Section: Tilting Table Experimentsmentioning

confidence: 99%