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Shaking Table Studies on the Conditions of Sand Liquefaction
This paper studies the effect of various ground motion parameters and their combinations on the liquefaction response of sand for free field and under the footing conditions. Number of cycles required for liquefaction and peak pore pressures observed in the tests were compared for different tests to arrive at quantitative conclusions regarding the conditions that initiate liquefaction in sand bed. Shaking table tests were carried out on saturated sand beds by varying the acceleration and frequency of base shaking. Tests were carried out on two-layered sand beds, the top layer being dry with varying thickness in different tests. Tests were also carried out with building load imposed on the sand bed to study the effect of building pressure on the liquefaction response and the soil-structure interaction during liquefaction. Results showed that increase in base acceleration resulted in increase in liquefaction potential. Effect of frequency was subdued until a threshold frequency is reached where the sand liquefied instantly. Thin dry sand layer on the top of the saturated sand bed has significant effect in controlling the liquefaction potential.
Shaking Table Studies on the Conditions of Sand Liquefaction
This paper studies the effect of various ground motion parameters and their combinations on the liquefaction response of sand for free field and under the footing conditions. Number of cycles required for liquefaction and peak pore pressures observed in the tests were compared for different tests to arrive at quantitative conclusions regarding the conditions that initiate liquefaction in sand bed. Shaking table tests were carried out on saturated sand beds by varying the acceleration and frequency of base shaking. Tests were carried out on two-layered sand beds, the top layer being dry with varying thickness in different tests. Tests were also carried out with building load imposed on the sand bed to study the effect of building pressure on the liquefaction response and the soil-structure interaction during liquefaction. Results showed that increase in base acceleration resulted in increase in liquefaction potential. Effect of frequency was subdued until a threshold frequency is reached where the sand liquefied instantly. Thin dry sand layer on the top of the saturated sand bed has significant effect in controlling the liquefaction potential.
Shaking Table Studies on the Conditions of Sand Liquefaction
Varghese, Renjitha Mary (author) / Latha, G. Madhavi (author)
Geo-Congress 2014 ; 2014 ; Atlanta, Georgia
Geo-Congress 2014 Technical Papers ; 1244-1253
2014-02-24
Conference paper
Electronic Resource
English
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