New Approach to Determine Seismic Passive Resistance on Retaining Walls Considering Seismic Waves

Choudhury, Deepankar; Katdare, Amey Deepak

doi:10.1061/(asce)gm.1943-5622.0000285

Cited by 40 publications

(5 citation statements)

References 20 publications

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“…As the train speeds and axle loads keep on increasing, the vibration levels are amplified to a great extent. Energy from the surface sources of vibration mainly propagates in the form of Rayleigh waves, which are confined to a narrow zone near to the surface of the elastic half space (Choudhury and Katdare 2013). In addition, these waves attenuate with distance in a rather slow manner when compared to the Body waves, which predominates near to the source of vibration.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Open and Infill Trenches in Mitigating Ground-Borne Vibrations

Bose

Choudhury

Sprengel

et al. 2018

J. Geotech. Geoenviron. Eng.

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Section: Introductionmentioning

confidence: 99%

Efficiency of Open and Infill Trenches in Mitigating Ground-Borne Vibrations

Bose

Choudhury

Sprengel

et al. 2018

J. Geotech. Geoenviron. Eng.

Self Cite

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“…Although the M-O method is a very straightforward method to use, it has a limitation of not replicating, and hence simulating, the real field behavior and, therefore, at times overestimating the seismic earth pressure (e.g., Nakamura 2006; Al Atik and Sitar 2009;Jo et al 2017;Bakr and Ahmad 2018a). Extensive efforts have been made to study the seismic earth pressure behind a rigid retaining wall (e.g, Choudhury and Katdare 2013;Tang et al 2014;Dey et al 2017;Zhou et al 2018;Rajesh and Choudhury 2017), whereas little attention has been paid to investigate the development of seismic earth pressure behind a cantilever-type retaining wall. Further, with regards to finding a critical case that needs to be considered for designing a cantilevertype retaining wall under seismic conditions, there are several contradictory evidences in the available literature.…”

Section: Introductionmentioning

confidence: 99%

Finite-Element Study for Seismic Structural and Global Stability of Cantilever-Type Retaining Walls

2019

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This paper investigates the structural and global stability of a cantilever-type retaining wall under seismic loading using numerical modelling. A new and robust approach is proposed to compute the seismic earth pressure behind the stem and along a virtual plane passing the heel of the wall. The results show that under different earthquake characteristics and wall geometries, the seismic earth pressure forces may be out of phase, leading to different seismic responses of the wall. The critical scenario for the structural stability is observed when the maximum acceleration is directed toward the backfill soil, and the earthquake frequency content is close to the natural frequency of the wall. In contrast, the critical scenario for the global stability occurs when the maximum acceleration is directed with minimum frequency content. Further, the natural frequency of the wall does not affect the global stability of the wall. However, the duration of the applied earthquake acceleration does affect the global stability of the wall, whereas the structural stability remains unaffected by it. In contrast with the current understanding, the possibility of failure of a cantilever-type retaining wall by horizontal sliding is remarkably increased with time of the applied earthquake acceleration.

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“…By contrast, determination of elastic strain energy released from microseismic focus has been paid less attention. Current focus energy computation methods applied for microseisms such as the seismic duration and phase integral are mainly referred from the seismology, for which equivalent energy density using the reference equiphase surface is the common approach [14][15][16][17][18][19]. However, it is commonly found that microseismic focus energy obtained from the energy density method is relatively defective and is not reliable enough [20,21].…”

Section: Introductionmentioning

confidence: 99%

Focus Energy Determination of Mining Microseisms Using Residual Seismic Wave Attenuation in Deep Coal Mining

Zhang

Liu

Chen

et al. 2018

Shock and Vibration

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Based on the energy attenuation characteristics of residual wave in deep rock, a method was developed to determine the microseismic focus energy. Differential energy loss in infinitesimal spreading distance is logically deduced, upon which energy attenuation equation was established. With a logarithmic transformation, a linear relation of the residual seismic energy with distance is formulated. Its intercept was used to determine the microseismic focus energy. The result is compared with that determined by the energy density method. The reliability of the determined focus energy and the impact of the built-in velocity threshold on the residual wave energy computation are discussed. Meanwhile, the energy absorption coefficient used for representing the absorption characteristics of the rock medium in the mining region under study is also clarified. Key findings show that the microseismic focus energy confirmed by the residual wave attenuation is reliable. The result’s accuracy is quite high, especially for the events in deep rock with great homogeneity. The developed focus energy computation method is closely dependent on the integrity of waveform, accuracy of repositioning, and reliability of effective components extraction. The new method has been shown to be effective and practical.

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New Approach to Determine Seismic Passive Resistance on Retaining Walls Considering Seismic Waves

Cited by 40 publications

References 20 publications

Efficiency of Open and Infill Trenches in Mitigating Ground-Borne Vibrations

Efficiency of Open and Infill Trenches in Mitigating Ground-Borne Vibrations

Finite-Element Study for Seismic Structural and Global Stability of Cantilever-Type Retaining Walls

Focus Energy Determination of Mining Microseisms Using Residual Seismic Wave Attenuation in Deep Coal Mining

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