Static and cyclic behavior of North Coast calcareous sand in Egypt

Salem, Mona M; Elmamlouk, Hussein H.; Agaiby, Shehab S.

doi:10.1016/j.soildyn.2013.09.001

Cited by 152 publications

(38 citation statements)

References 14 publications

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“…For saturated soils, the strains and the microstructural changes are the two primary factors that influence the development and change of the pore water pressure [26][27][28][29][30]. The cyclic strain behaviors of soil depend on its cyclic stress conditions.…”

Section: Cyclic Stress Ratiomentioning

confidence: 99%

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Determination of traffic-load-influenced depths in clayey subsoil based on the shakedown concept

Tang

Chen

Sang

et al. 2015

Soil Dynamics and Earthquake Engineering

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Section: Cyclic Stress Ratiomentioning

confidence: 99%

“…The pore pressure ratio is defined as the ratio of pore pressure generation to the effective consolidation pressure [30,31]. As shown in Fig.…”

Section: Vertical Stress Response In the Subsoilmentioning

confidence: 99%

Determination of traffic-load-influenced depths in clayey subsoil based on the shakedown concept

Tang

Chen

Sang

et al. 2015

Soil Dynamics and Earthquake Engineering

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“…Xiao et al analyzed the dynamic strength, cyclic deformation, and pore pressure of saturated coral sand and microbial reinforced coral sand by the dynamic triaxial test in order to study the dynamic response characteristics of pile-soil-structure system in coral sand under earthquake [1]. Salem et al pointed out that the calcareous sand has higher dynamic strength than siliceous sands and suggested the dynamic resistance ratio-confining pressure-relative density relationship of calcareous sand from North Coast Dabaa [14]. Xu et al studied the transmission law of explosive stress wave in saturated coral sand and quartz sand, and concluded that saturated coral sand has a stronger absorption and attenuation effect on explosive stress wave than quartz sand [15].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on Seismic Response of Pile Group Foundation in Coral Sand and Fujian Sand

Ding

Zhang

et al. 2020

JMSE

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The physical and mechanical properties of coral sand are quite different from those of common terrestrial sands due to the special marine biogenesis. Shaking table tests of three-story structures with nine-pile foundation in coral sand and Fujian sand were carried out in order to study the dynamic response characteristics of pile-soil-structure system in coral sand under earthquake. The influence of shaking intensity on the dynamic response of the system was taken into consideration. The results indicated that the peak value of the excess pore pressure ratio of coral sand was smaller than that of Fujian sand under two kinds of shaking intensities; moreover, the development speed of excess pore pressure ratio of coral sand was smaller than that of Fujian sand. The liquefaction of coral sand was more difficult than Fujian sand under the same relative density and similar grain-size distribution. The horizontal displacement, settlement, column bending moment, and pile bending moment of coral sand were smaller than those of Fujian sand, respectively. The magnification effect of column bending moment of buildings in coral sand was less than that in Fujian sand with increasing shaking intensity. This study can provide some supports for the seismic design of coral reef projects.

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“…Different theoretical and experimental methods have been used to study on the effects of the cyclic loading on the failure of the footings interacting with soil. Salem et al (2013) have defined the cyclic loading failure of the footings interacting with the soil as the number of loading cycles required to reach liquefaction (quick condition) or to reach an axial strain of 5%. A soil liquefaction phenomenon occurs when a saturated or partially saturated soil significantly loses their strength and stiffness in response to the cyclic loading, causing the sand to behave like a liquid.…”

Section: Introductionmentioning

confidence: 99%

Local Scale Displacement Fields in Grains–Structure Interactions Under Cyclic Loading: Experiments and Simulations

Antony

Jahanger

2019

Geotech Geol Eng

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Soils encounter cyclic loading conditions in situ, for example during the earthquakes and in the construction sequences of pavements. Investigations on the local scale displacements of the soil grain and their failure patterns under the cyclic loading conditions are relatively scarce in the literature. In this study, the local displacement fields of a dense sand layer interacting with a rigid footing under the planestrain condition are examined using both experiments and simulations. Three commonly used types of cyclic loading conditions were applied on the footing. Digital particle image velocimetry (DPIV) is used to measure the local scale displacement fields in the soil, and to understand the evolution of the failure envelopes in the sand media under the cyclic loading conditions. The experimental results are compared with corresponding finite element analysis (FEA), in which experimentally-characterised constitutive relations are fed as an input into the FEM simulations. For comparison purposes, the case of footing subjected to the quasistatic loading condition was also studied. In general, the results show a good level of agreement between the results of the experiments and simulations conducted here. Overall, relatively shallower but wider displacement fields are observed under the cyclic loading, when compared with that of the quasi-static load test. The vorticity regions are highly localized at the shear bands in the sand media under the ultimate load. The research contributes to new understanding on the local scale displacement fields and their link to the bearing capacity of the footing under the cyclic loading environments.

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Static and cyclic behavior of North Coast calcareous sand in Egypt

Cited by 152 publications

References 14 publications

Determination of traffic-load-influenced depths in clayey subsoil based on the shakedown concept

Determination of traffic-load-influenced depths in clayey subsoil based on the shakedown concept

Comparative Study on Seismic Response of Pile Group Foundation in Coral Sand and Fujian Sand

Local Scale Displacement Fields in Grains–Structure Interactions Under Cyclic Loading: Experiments and Simulations

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