Numerical and experimental study on scaled soil-structure model for small shaking table tests

Göktepe, Fatih; Çelebi, Erkan; Omid, Ahmad

doi:10.1016/j.soildyn.2019.01.016

Cited by 31 publications

(12 citation statements)

References 30 publications

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“…The sand embankment properties were as follows: i) average unit weight ii) the relative density which were 18 KN/m3 and 60% respectively. These results obtained were similar to that of other researcher swho only used sand embankment without clay soil (Eric et al, 2013;Goktepe et al, 2019;Srilatha et al, 2013). The cyclic behaviour of the soft clay has been analysed based on the different input frequency.…”

Section: Face Displacement Responsesupporting

confidence: 86%

Soil Zonation and The Shaking Table Test of The Embankment on Clayey Soil

Hore¹,

Chakraborty²,

Bari³

et al. 2020

Geos. Ind.

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The main objective of this research was to model the zonation of wrap faced embankment on soft clay foundation, by applying a shake table test. Also, to investigate the dynamic behaviors of clay soil, such as acceleration amplification, displacement and pore water pressure of wrap faced embankment. This was done with respect to changes in frequencies of 1 Hz, 3 Hz, 5 Hz, 10 Hz, 12 Hz and 15 Hz respectively. Constant acceleration (0.1 g) and surcharge (19 Kg) were applied by using a laminar box, placed on a shake table testing machine. The main elements of this research were the laboratory test, which was used for preparing reconstitute soil samples, and wrap faced embankment with frequency arrangement. After applying all test parameters, dynamic parameters were increased by rise in elevation with respect to frequency. The result shows that the maximum dynamic parameters were found at the frequency of 10 Hz. It is beneficial to the relative performances of the wrap faced embankment, which is the updated design parameter. Keywords: Seismic; Clay Soil; Frequency; Shake Table Test; Wrap Faced; Soil Zonation Copyright (c) 2020 Geosfera Indonesia Journal and Department of Geography Education, University of Jember This work is licensed under a Creative Commons Attribution-Share A like 4.0 International License

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Section: Face Displacement Responsesupporting

confidence: 86%

Soil Zonation and The Shaking Table Test of The Embankment on Clayey Soil

Hore¹,

Chakraborty²,

Bari³

et al. 2020

Geos. Ind.

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“…Typical pore water pressure variations obtained from the tests are presented in Figs. (12)- (14). The height of clayey soil layer (H) was taken as 300 mm in the case of pore water pressure.…”

Section: Effect Of Acceleration On Pore Water Pressurementioning

confidence: 99%

“…Moreover, shaking is an effective technique to study the seismic response of underground structures embedded in soft soil sites. Goktepeet al [14] observed that the local soil properties have considerably amplified the earthquake response of the structures in comparison to the fixed base structure. Ç elebi et al [15] specified a realistic geometric scaling coefficient for test model to be used in a small-capacity shaking table.…”

Section: Introductionmentioning

confidence: 99%

Effect of Acceleration on Wrap Faced Reinforced Soil Retaining Wall on Soft Clay by Performing Shaking Table Test

Hore

Chakraborty

Shuvon

et al. 2020

Proc. eng. technol. innov.

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This research incorporates shaking table testing of scale wrap faced soil wall models to evaluate the seismic response of embankment. Currently the seismic designs of highway or railway embankment rely on little or no empirical data for calibrating numerical simulations. This research is working towards filling that empirical data gap. The specific purpose of the study was to evaluate the seismic response of constructed embankment model regarding the different input base accelerations with fixed frequency. A series of one-dimensional (1D) shaking table tests (0.05g, 0.1g, 0.15g and 0.2g), were performed on a 0.4 meters high wrap faced reinforced-soil wall model. Additionally, it was placed over 0.3 meters high soft clayey foundation. Predominantly, the influence of the base acceleration on the seismic response was studied in this paper. The physical models were subjected to harmonic sinusoidal input motions at a fixed frequency of 1 Hz, in order to assess the seismic behavior. The effects of parameters such as acceleration amplitudes and surcharge pressures on the seismic response of the model walls were considered. The relative density of the backfill material was kept fixed at 60%. The results of this study reveal that input accelerations and surcharge load had significant influence on the model wall, pore water pressure, and changes along the elevation. Acceleration response advances with the increase in base acceleration, so the difference being more perceptible at higher elevations. The pore water pressures were found to be high for high base shaking and low surcharge pressures at higher elevations. The results obtained from this study are helpful in understanding the relative performance of reinforced soil retaining wall under different test conditions resting on soft clay.

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“…The FE model for the validation test is as shown in Figure 6. A simple frame model was used [33][34][35][36] to validate the proposed vision-based FE model updating method. The element used in the FE model is the beam type, and the material properties are assumed to be elastic, and the basement and slab were applied steel (Unite Weight: 7.85 t/m3, E: 210 GPa, Poisson's Ratio: 0.3), and the wall was applied stainless steel (Unite Weight: 7.90 t/m3, E: 201 GPa, Poisson's Ratio: 0.3).…”

Section: Fe Modelmentioning

confidence: 99%

Vision-Based Structural FE Model Updating Using Genetic Algorithm

2021

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Structural members can be damaged from earthquakes or deterioration. The finite element (FE) model of a structure should be updated to reflect the damage conditions. If the stiffness reduction is ignored, the analysis results will be unreliable. Conventional FE model updating techniques measure the structure response with accelerometers to update the FE model. However, accelerometers can measure the response only where the sensor is installed. This paper introduces a new computer-vision based method for structural FE model updating using genetic algorithm. The system measures the displacement of the structure using seven different object tracking algorithms, and optimizes the structural parameters using genetic algorithm. To validate the performance, a lab-scale test with a three-story building was conducted. The displacement of each story of the building was measured before and after reducing the stiffness of one column. Genetic algorithm automatically optimized the non-damaged state of the FE model to the damaged state. The proposed method successfully updated the FE model to the damaged state. The proposed method is expected to reduce the time and cost of FE model updating.

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Numerical and experimental study on scaled soil-structure model for small shaking table tests

Cited by 31 publications

References 30 publications

Soil Zonation and The Shaking Table Test of The Embankment on Clayey Soil

Soil Zonation and The Shaking Table Test of The Embankment on Clayey Soil

Effect of Acceleration on Wrap Faced Reinforced Soil Retaining Wall on Soft Clay by Performing Shaking Table Test

Vision-Based Structural FE Model Updating Using Genetic Algorithm

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