Finite element evaluation of ultimate capacity of strip footing: assessment using various constitutive models and sensitivity analysis

Chavda, Jitesh T.; Dodagoudar, G. R.

doi:10.1007/s41062-017-0121-4

Cited by 22 publications

(6 citation statements)

References 25 publications

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“…This behavior is given in the HSsmall model by two extra material parameters, , and γ 0.7 where is the small-strain shear modulus and γ 0.7 is the strain level at which the shear modulus has decreased to approximately 70% of the small-strain shear modulus. This model has a cap yield surface (see Fig 5 ) and can more accurately reproduce soil deformations than the HS, linear elastic (LE), and elastoplastic Mohr-Coulomb (MC) because of its non-linear stress-strain relationship and soil stiffness calculated using an oedometer loading tangent stiffness, triaxle unloading/reloading stiffness, and triaxle loading secant stiffness [ 50 , 51 ].…”

Section: Finite Element Software and Its Validationmentioning

confidence: 99%

An EPR model for predicting the bearing capacity of single and double-strip foundations near earth slope crests

Ismael,

Sulaiman

2024

PLoS ONE

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It is imperative to understand how foundations behave on earthen slopes to accurately predict their allowable carrying capacity in geotechnical engineering. A comprehensive finite element (FE) simulation with PLAXIS 2D was conducted to assess the effects of various parameters on the bearing capacity (BC) of single- and double-strip foundations placed near the earth’s slope crest. The specified parameters include foundation width (B) and depth (Df/B); setback distance between the slope edge and foundation (b/B); soil internal friction (ϕ) and cohesion (c); slope inclination (β); and spacing between foundations (S/B). In addition, the numerically simulated database was used to develop simple mathematical expressions for predicting the capacities in both cases using evolutionary polynomial regression (EPR). The results revealed that the bearing capacity of single- and double-strip foundations increased with an increase in all studied parameters except slope inclination. For single-strip foundations, the outcomes demonstrated that slope inclination has no impact on BC when it is located 6B from the slope edge. However, under interference conditions, the critical center-to-center spacing between foundations is 3–4B, beyond which they behave as individual foundations. Additionally, EPR provides a robust method of predicting the BC of single- and double-strip foundations within slope crests based on the strong correlation of various statistical criteria between simulated and predicted results from training, validation, and testing. Finally, according to sensitivity analysis, in both single and double-strip foundations resting on an earthen slope crest, b/B, B, and ϕ are the most important input parameters that impact the output results.

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Section: Finite Element Software and Its Validationmentioning

confidence: 99%

An EPR model for predicting the bearing capacity of single and double-strip foundations near earth slope crests

Ismael,

Sulaiman

2024

PLoS ONE

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“…Using the general finite element software ANSYS for the numerical simulation of the AFB [27][28][29], full-scale modeling of the tower base plate and the extended part of the foundation bolts is conducted. The finite element foundation prototype is based on the relevant design from a certain provincial power design institute, selected for a certain transmission line project tower foundation.…”

Section: Numerical Simulation Of Afbmentioning

confidence: 99%

Experimental and Finite Element Analyses of Adjustable Foundation Bolts in Transmission Towers

Yin,

Xiao,

Huang

et al. 2024

Buildings

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Uneven settlement of transmission tower foundations can result in catastrophic events, such as tower collapse and line failures, disrupting power transmission operations. To address the challenging repairs caused by uneven foundation settlement of transmission towers, we propose an adjustable foundation bolt (AFB). This paper provides a detailed theoretical analysis of the AFB’s stability and load-bearing capacity, including critical buckling force formulas and maximum normal stress expressions. Finite element simulations confirm the precision of our theoretical formulations. Additionally, we introduce a method using baffles to enhance its load-bearing capacity, analyzing the impact of different numbers of baffles through numerical simulations. The experimental results validate the effectiveness of baffles in enhancing structural load-bearing capacity. The device brings convenience and efficiency to the maintenance of transmission towers.

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“…A geologic material especially, soil is a complicated material that behaves nonlinearly and often shows anisotropic and time-dependent behavior when subjected to different loading types [27,28]. Lade [24] pointed out criteria for selecting an appropriate constitutive model.…”

Section: Mathematical Model and Constitutive Modelmentioning

confidence: 99%

Numerical Study on Optimization of Piled Raft Foundation on Stratified Soil under Static Load

Yirsaw,

Ashango

2023

Advances in Civil Engineering

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Piled raft foundation (PRF) is a combination of pile and raft that provides adequate bearing capacity under the allowable settlement. This research aims to optimize the PRF design for a 48-story Commercial Bank headquarters building in Addis Ababa, Ethiopia, by conducting parametric study on various pile configuration using FLAC3D (Fast Lagrangian Analysis of Continua in three Dimensions) software. We analyzed 28 piled raft configurations and found that increasing the distance between piles increases the raft load sharing distribution by 11.5% while reducing settlement. Despite variations in pile length and diameter, a close load sharing between the pile and raft is accomplished at a separation of seven times the pile diameter (7D). The largest settlement decrease achieved was 9% for a 2-m pile diameter by doubling the pile length from 10 to 20 m, indicating that increasing pile length is ineffective for settlement reduction. We also proposed two new pile configurations that share load equally among pile and raft, and slightly increase total settlement below 10-cm limit. The results show that the first configuration exceeds differential settlement limit, but the second configuration reduces it by 95% and saves 40% of piles. This study provides a useful reference for designing PRF for high-rise buildings in similar soil conditions.

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Finite element evaluation of ultimate capacity of strip footing: assessment using various constitutive models and sensitivity analysis

Cited by 22 publications

References 25 publications

An EPR model for predicting the bearing capacity of single and double-strip foundations near earth slope crests

An EPR model for predicting the bearing capacity of single and double-strip foundations near earth slope crests

Experimental and Finite Element Analyses of Adjustable Foundation Bolts in Transmission Towers

Numerical Study on Optimization of Piled Raft Foundation on Stratified Soil under Static Load

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