Effects of physical modeling boundary conditions on the responses of 3 × 3 pile groups to liquefaction induced lateral spreading

Haeri, S. Mohsen; Rajabigol, Morteza; Salaripour, Saman; Kavand, Ali; Sayyaf, Hiwa; Afzalsoltani, Sina; Asefzadeh, Arian

doi:10.1007/s10518-023-01648-4

Cited by 12 publications

(2 citation statements)

References 38 publications

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“…The "permanent displacement effect" which is the result of the displacement of the residual earth due to the tectonic deformations related to the failure mechanism, is described by a one-way velocity pulse with a long amplitude and with a uniform step in the time history of the displacement (8). Another feature of these earthquakes is the "overwall effect" which is created due to the proximity of the buildings on the overwall to the fault plane compared to the buildings with the same distance on the downwall (9). Investigating this factor (underwall or extrawall effect) on the structure and if the structure is in the area of the extrawall or underwall, what acceleration will it receive and how will the response of the structure be in front of these accelerations.…”

Section: Introductionmentioning

confidence: 99%

Performance of Pile Group in Soils Prone to Liquefaction Affected by Far and Near Earthquakes

Gavadimoghaddam,

Hadiani,

Sadreddini

et al. 2024

IJE

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The aim of the current research is to investigate the pile group functions in liquefaction prone soil under the influence of far and near earthquakes and structural responses such as acceleration history, displacement and bending moments. The method of estimating the response spectrum of the building was used according to the distance, size, structural conditions and fault mechanism and measuring the response spectrum of a selected recorded or artificial earthquake. By using opensees software, Midas Gts, different modes of research were formed. In the selection of earthquake accelerometers for the far and near areas, Peer Seismography Center, Iran Accelerography Center and Road and Housing Research Center were used to select and modify the accelerometers. The results of the research showed that increasing the diameter of the pile reduces the possibility of liquefaction, so that by increasing the diameter of the pile from 0.5 m to 1 m, the possibility of liquefaction and collapse of the pile group decreases by about 33%. In addition, with an increase in the distance between the piles, the probability of liquefaction increases, so that the probability of liquefaction of the group of piles and its collapse increases by about 14% when the distance between the piles increases from 1.5 to 5 meters. Finally, using the results of numerical modeling and with coding software, a suitable model for the pile group against liquefaction was presented for earthquakes in the far and near domains.

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Section: Introductionmentioning

confidence: 99%

Performance of Pile Group in Soils Prone to Liquefaction Affected by Far and Near Earthquakes

Gavadimoghaddam,

Hadiani,

Sadreddini

et al. 2024

IJE

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“…Traditional piles have been studied using physical modeling technique in several studies [1][2][3][4][5]. The behavior of energy piles as a form of energy geo-structures has gained increasing scholarly attention in recent years.…”

Section: Introductionmentioning

confidence: 99%

Pile group behavior under unsymmetrical cyclic thermal loading in dry silty sand: 1g Physical modeling

Jafarzadeh,

Afzalsoltani

2024

Scientia Iranica

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The effect of unsymmetrical thermal loading on the behavior of 2×2 pile groups is studied using 1g physical modeling. Three tests were conducted with 1, 2 and 3 energy piles in each pile group to apply the cyclic unsymmetrical thermal load. Model piles were closed-end aluminum pipes and the model ground was fine-grained dry silty sand, placed in the container with dry tamping technique. 10 successive heating-cooling cycles with amplitude of ±6°C were applied to the energy piles. Displacements and rotations of the cap, axial forces and bending moments along the piles, changes in soil pressure under the pile tip and temperature distribution around the group are monitored and discussed in detail. A new parameter, named as "pile tip behavior index" (I pt ) is introduced to determine the elastic/plastic state of the soil under the pile tip during each test. Results suggest that build-up of plastic zones in the soil under the energy pile during first stages of the unsymmetrical thermal cycling along with redistribution of the mechanical surcharge among different piles of each group may contribute to cause unallowable rotations of the pile cap.

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Experimental and finite element analyses of seismic behavior of pile-reinforced soft clayey slope

Zhang,

Chen

et al. 2024

Bull Eng Geol Environ

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Effects of physical modeling boundary conditions on the responses of 3 × 3 pile groups to liquefaction induced lateral spreading

Cited by 12 publications

References 38 publications

Performance of Pile Group in Soils Prone to Liquefaction Affected by Far and Near Earthquakes

Performance of Pile Group in Soils Prone to Liquefaction Affected by Far and Near Earthquakes

Pile group behavior under unsymmetrical cyclic thermal loading in dry silty sand: 1g Physical modeling

Experimental and finite element analyses of seismic behavior of pile-reinforced soft clayey slope

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