Vibration response of saturated sand - foundation system

Fattah, Mohammed Y.; Al-Mosawi, Mosa J.; Al-Ameri, Abbas Fadhil Ibrahim

doi:10.12989/eas.2016.11.1.083

Cited by 14 publications

(5 citation statements)

References 7 publications

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“…After examining previous studies by different researchers, like [19][20][21][22][23][24], a preliminary concept was developed; then, the experimental model group was designed. The primary concept could be a machine-based foundation with dimensions 80 × 80 × 40mm (vibration source), and also the second base with 80 mm diameter is subject only to fixed load.…”

Section: Test Setupmentioning

confidence: 99%

Dynamic response of a footing adjacent to dynamically loaded footing on gypseous soil

Al-Ezzi

Zakaria

2020

SN Appl. Sci.

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This paper presents an experimental study on the dynamic response of a circular foundation, underneath the have an impact on of a dynamic load that outcomes from the placement of a neighbouring footing said as (vibration source), having square-shaped and excited by way of a known source of vibration placed on top of it. The cause is to evaluate the effect of dynamic motion closely by group called the second foundation. Both foundations were founded on collapsible soil (gypseous soil) with a content of gypsum 65%. The research is conducted in dry and soaked conditions with an oversized experimental programme. The first base (source vibration) and also the second base are made of steel, with the size of 80 × 80 × 40 and the circular shape of 80 mm diameter. Subsequently, the soil had been prepared in layers in steel containers with 1000 × 500 × 500 mm, then the two foundations positioned centrally over the underside. The first footing excited by the rotating mass type mechanical oscillator to come back up with vertical harmonic loading, produces a related have an impact on of dynamic loads and also the 2nd base is loaded with only static weight under dynamic excitement. The checks are conducted beneath dynamic response for 3 frequencies (12,18,24) Hz, Displacement amplitude and acceleration of the 2nd foundation are examined, at a special distance between the inspiration (2B, 4B, 6B). The results have shown that when the space between the inspiration increases, the amplitude and also the acceleration for the second foundation decreases. Furthermore, the value of these parameters at dry condition is larger than their value at soaked states.

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Section: Test Setupmentioning

confidence: 99%

Dynamic response of a footing adjacent to dynamically loaded footing on gypseous soil

Al-Ezzi

Zakaria

2020

SN Appl. Sci.

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“…In a study, the reconstitution of dry sand samples involves various methods such as tamping [15][16][17][18], vibration [19,20], and pluviation, which has been extensively explored in the literature. These methods have demonstrated their efficacy in achieving different relative densities, with values typically ranging from 40% to 100% [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Uniformity of Reconstitution of Liquefiable Sand Specimen Using a Rainer Box System

Salimah

2024

GEOMATE

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Experimental laboratory-scale liquefaction models aim to investigate the behavior of soils, particularly non-cohesive soils with liquefaction potential. Achieving the desired density in reconstituted soil beds is vital for conducting geotechnical modeling tests. The first stage is that the soil samples must be reconstructed to approach their original state. It assesses parameters such as the densities, moisture content, and uniformity of the sand specimens obtained from each setup. The dry density of soil samples is an important parameter used in geotechnical engineering for designing structures in liquefiable sands. This paper describes the efforts to create a sand Rainer box that facilitates specimen reconstitution using the air pluviation method. The Rainer system used in this laboratory was designed to control the velocity of sand rain using a perforated plate. The diameter of the perforated plate is 0.6 mm, and liquefiable sand samples with 0.15 to 0.5 mm particle size were used. The procedure entailed combining sand and water in a container, allowing the sand to settle, and eliminating excess water. To control the uniformity of relative density, use a mold with three positions in a box plan. It is placed in the middle and the corners in a box plan. The Sand Rainer Box produced the reconstituted specimen with less than 8% error for horizontal and 5% for vertical uniformity. This dependable accurately estimates relative density when preparing sand samples for repeated laboratory testing. The research illustrates the effectiveness of the Rainer system in producing sand specimens with consistent characteristics.

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“…The main advantage of the large-scale experimental method is the real conditions of the soil environment, an in turn precise simulation. Typically, the large-scale testing results are the best data for verifying numerical modeling [43][44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

Model Tests on Determining the Effect of Various Geometrical Aspects on Horizontal Impedance Function of Surface Footings

Maleki

Jafarzadeh

2023

Scientia Iranica

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Problems associated with soil-structure interaction have been determined and the Impendence Functions evaluated. The aim of this paper is studying horizontal impedance function for surface footings by physical model tests. For this purpose, a cubic steel container was used as a testing environment for two different conditions, a rigid base, and a homogeneous half-space model. The effect of various parameters such as footing shape, embedment ratio, inertia, and dynamic force amplitude was studied in three shapes; rectangular, square, and circle footing. The results indicated that the massless impedance function theory was confirmed at the Dimensionless Frequency of less than 2.5. Also, in the rigid base model, soil response heavily depends on the vibration frequency, developed by boundary conditions and side walls, in contrast to the half-space model. The rigid base, distribution and reflection of waves in the soil, and dissipation of higher wave energy substantially influenced the dynamic response of soil-foundation system. Additionally, the embedment ratio significantly affected the impedance functions.

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Vibration response of saturated sand - foundation system

Cited by 14 publications

References 7 publications

Dynamic response of a footing adjacent to dynamically loaded footing on gypseous soil

Dynamic response of a footing adjacent to dynamically loaded footing on gypseous soil

Uniformity of Reconstitution of Liquefiable Sand Specimen Using a Rainer Box System

Model Tests on Determining the Effect of Various Geometrical Aspects on Horizontal Impedance Function of Surface Footings

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