Improvement of shallow foundation using non-liquefiable recycle materials

Abdullah, Amizatulhani; Hazarika, Hemanta

doi:10.3208/jgssp.sea-08

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…Results verified the effectiveness of the proposed mitigation method, as a decrease of the seismic load and structural displacement was observed. Numerical modelling of drains containing reused material was performed by Abdullah and Hazarika [21]. Soil improvement, considering vertical drains with coir dust and sea sand inside, was evaluated by Kumara et al [22].…”

Section: Earthquake Induced Liquefactionmentioning

confidence: 99%

Sustainable Measures for Protection of Structures Against Earthquake Induced Liquefaction

Madabhushi

García-Torres

2021

Indian Geotech J

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Soil liquefaction can cause excessive damage to structures as witnessed in many recent earthquakes. The damage to small/medium-sized buildings can lead to excessive death toll and economic losses due to the sheer number of such buildings. Economic and sustainable methods to mitigate liquefaction damage to such buildings are therefore required. In this paper, the use of rubble brick as a material to construct earthquake drains is proposed. The efficacy of these drains to mitigate liquefaction effects was investigated, for the first time to include the effects of the foundations of a structure by using dynamic centrifuge testing. It will be shown that performance of the foundation in terms of its settlement was improved by the rubble brick drains by directly comparing them to the foundation on unimproved, liquefiable ground. The dynamic response in terms of horizontal accelerations and rotations will be compared. The dynamic centrifuge tests also yielded valuable information with regard to the excess pore pressure variation below the foundations both spatially and temporally. Differences of excess pore pressures between the improved and unimproved ground will be compared. Finally, a simplified 3D finite element analysis will be introduced that will be shown to satisfactorily capture the settlement characteristics of the foundation located on liquefiable soil with earthquake drains.

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Section: Earthquake Induced Liquefactionmentioning

confidence: 99%

Sustainable Measures for Protection of Structures Against Earthquake Induced Liquefaction

Madabhushi

García-Torres

2021

Indian Geotech J

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“…In the past one and a half decades, numerical simulations and analytical modelling have been conducted by various researchers to demonstrate the effectiveness of GSI systems (Tsang et al 2009(Tsang et al , 2012aPitilakis et al 2015;Anbazhagan et al 2015;Abdullah and Hazarika 2016;Brunet et al 2016;Dhanya et al 2020;Forcellini and Alzabeebee 2022). Experimental testing and field measurement have also been performed to confirm the isolation mechanism and to evaluate their performance (Kaneko et al 2013;Nikitas et al 2014;Nappa et al 2016;Tsiavos et al 2019;Tsang et al 2021;Pitilakis et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Analytical design models for geotechnical seismic isolation systems

Tsang

2022

Bull Earthquake Eng

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Geotechnical Seismic Isolation (GSI) can be defined as a new category of seismic isolation techniques that involve the dynamic interaction between the structural system and geo-materials. Whilst the mechanism of various GSI systems and their performance have already been demonstrated through different research methods, there is a missing link between fundamental research and engineering practice. This paper aims to initiate the development in this direction. A new suite of equivalent-linear foundation stiffness and damping models under the same framework is proposed for four GSI configurations, one of which is a novel combination of two existing ones. The exact solutions for the equivalent dynamic properties of flexible-base systems have also been derived that explicitly include the foundation inertia and the strain-dependent equivalent damping of foundation materials, which are both significant for GSI systems. The application of the proposed analytical design models has been illustrated through response history analyses and a detailed hand-calculation design procedure has also been outlined and demonstrated.

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