Reduction of dynamic earth loads on flexible cantilever retaining walls by deformable geofoam panels

Ertuğrul, Özgür L.; Trandafir, Aurelian C.; Özkan, M. Yener

doi:10.1016/j.soildyn.2016.10.011

Cited by 25 publications

(9 citation statements)

References 18 publications

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“…Additionally, XPS is widely used in construction such as core materials of sandwich wall panels [17][18][19][20][21][22][23][24] and geofoams [25][26][27] because the lightweight nature of XPS is effective for the attenuation of seismic forces. Nevertheless, there is a concern that large deformation and failure are often induced in XPS under static or dynamic forces because of the low mechanical properties of XPS.…”

Section: Introductionmentioning

confidence: 99%

In-plane shear modulus of extruded polystyrene foam measured by the torsional vibration, square-plate twist and simple shear methods

Yoshihara

Maruta

2019

Journal of Cellular Plastics

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In this work, the in-plane shear modulus of extruded polystyrene foam was obtained using the torsional vibration and square-plate twist methods on square plate specimens with various lengths and performing subsequent numerical analysis on the test data. Additionally, the ASTM C273/273M-11 simple shear tests were conducted and the results were compared with those obtained from the torsional vibration and squareplate twist methods. The in-plane shear modulus value obtained from the torsional vibration and square-plate twist methods was often dependent on the specimen configuration. Nevertheless, the in-plane shear modulus value could be obtained effectively by introducing a simple correction coefficient determined from the numerical analysis. In contrast, the in-plane shear modulus value obtained from the simple shear test was often lower than those obtained from the torsional vibration and square-plate twist methods.

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Section: Introductionmentioning

confidence: 99%

In-plane shear modulus of extruded polystyrene foam measured by the torsional vibration, square-plate twist and simple shear methods

Yoshihara

Maruta

2019

Journal of Cellular Plastics

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“…In this method, the effect of the earthquake is simulated by introducing additional forces called as the seismic inertia forces on to a soil wedge which exert lateral earth pressure on the retaining wall, called as the seismic earth pressure. Over the past many years, many researchers like [14][15][16][17][18][19][20] have modified and extended the MO method to propose new analytical solutions like the pseudo-dynamic method to compute the seismic earth pressure while other researchers like [21][22][23][24] developed experimental and numerical methods to compute the seismic earth pressure by using the MO method. Further, [25,26] have developed numerical methods for studying the phasing issues for the seismic response of yielding and non-yielding gravity retaining walls.…”

Section: Introductionmentioning

confidence: 99%

A finite element performance-based approach to correlate movement of a rigid retaining wall with seismic earth pressure

Bakr

Ahmad

2018

Soil Dynamics and Earthquake Engineering

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The paper presents a unique finite element model-based investigation and development of a relationship between the seismic active and passive earth pressure and the movement of a rigid retaining wall. A hardening soil with small strain model with consideration of the Rayleigh damping has been adopted for modelling soil. Validation of the finite element model has been carried out by using centrifuge test results already available in the literature. Unique design charts have been proposed highlighting the relationship between the seismic earth pressure and the wall movement. It is observed that the seismic active earth pressure is independent of the seismic input motion and hence does not depend upon the wall movement during an earthquake, while on the contrary the seismic passive earth pressure is significantly affected by it. Comparison of the results of the present study with the Mononobe-Okabe and pseudo-dynamic methods clearly highlights that the latter overestimates the seismic earth pressure. The proposed design charts and other results provide an important cue to the design engineers.

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“…With reference to boundary conditions, the presence of CIs between the abutment and the backfill allows dissipation of lateral earth pressures. In some early applications inclusions of this type were employed against static loads, 43,44 while more recently their use was extended to earthquake induced earth pressures against rigid walls 33,45–47 . Moreover, CIs allow for controlling displacements of the backfill which can be used in performance‐based design 48,49 …”

Section: Introductionmentioning

confidence: 99%

Integral abutment bridges: Investigation of seismic soil‐structure interaction effects by shaking table testing

Fiorentino

Cengiz

Luca

et al. 2020

Earthq Engng Struct Dyn

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In recent years there has been renewed interest on integral abutment bridges (IABs), mainly due to their low construction and maintenance cost. Owing to the monolithic connection between deck and abutments, there is strong soil‐structure interaction between the bridge and the backfill under both thermal action and earthquake shaking. Although some of the regions where IABs are adopted qualify as highly seismic, there is limited knowledge as to their dynamic behaviour and vulnerability under strong ground shaking. To develop a better understanding on the seismic behaviour of IABs, an extensive experimental campaign involving over 75 shaking table tests and 4800 time histories of recorded data, was carried out at EQUALS Laboratory, University of Bristol, under the auspices of EU‐sponsored SERA project (Seismology and Earthquake Engineering Research Infrastructure Alliance for Europe). The tests were conducted on a 5 m long shear stack mounted on a 3 m × 3 m 6‐DOF earthquake simulator, focusing on interaction effects between a scaled bridge model, abutments, foundation piles and backfill soil. The study aims at (a) developing new scaling procedures for physical modelling of IABs, (b) investigating experimentally the potential benefits of adding compressible inclusions (CIs) between the abutment and the backfill and (c) exploring the influence of different types of connection between the abutment and the pile foundation. Results indicate that the CI reduces the accelerations on the bridge deck and the settlements in the backfill, while disconnecting piles from the cap decreases bending near the pile head.

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Reduction of dynamic earth loads on flexible cantilever retaining walls by deformable geofoam panels

Cited by 25 publications

References 18 publications

In-plane shear modulus of extruded polystyrene foam measured by the torsional vibration, square-plate twist and simple shear methods

In-plane shear modulus of extruded polystyrene foam measured by the torsional vibration, square-plate twist and simple shear methods

A finite element performance-based approach to correlate movement of a rigid retaining wall with seismic earth pressure

Integral abutment bridges: Investigation of seismic soil‐structure interaction effects by shaking table testing

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