Upper bound solution for the bearing capacity of two adjacent footings on rock masses

Shamloo, Saeed; Imani, Meysam

doi:10.1016/j.compgeo.2020.103855

Cited by 13 publications

(4 citation statements)

References 19 publications

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“…It is not uncommon to see adjacent footings be constructed in mountainous areas that requires the employment of the Hoek-Brown yield criterion for rock mass. Very recently, two closely spaced strip footings on Hoek-Brown rock masses were investigated by Shamloo and Imani (2021) using the analytical upper bound theorem, which requires an assumption of failure mechanism of two strip footings. This study therefore set out to assess the efficiency factor of two distinct interference problems, namely the two closely spaced strip footings and the multiple closely spaced strip footings on Hoek-Brown rock masses.…”

Section: Introductionmentioning

confidence: 99%

Stability Charts for Closely Spaced Strip Footings on Hoek–Brown Rock Mass

et al. 2022

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Footings are constructed closely to each other in mountainous rock areas and the determination of closely spaced bearing capacity footings on rock masses has become an important topic of recent research. The primary aim of this paper is to determine an efficiency factor, just like in the design of a pile group, that can be used to evaluate the bearing capacity of closely spaced footings on Hoek–Brown mass. The advanced finite element limit analysis of upper and lower bound theorems is used to study the stability of two and multiple interfering footings using the Hoek–Brown parameters such as GSI (geological strength index) and mi (Hoek–Brown yield parameter). This study found that the efficiency factor is influenced by three dimensionless parameters including GSI, mi, and S/B. Failure mechanisms of the problems are also investigated, and stability charts and tables produced for practical uses. Overall, these results broadly support the common understanding of the two key parameters GSI and mi in the HB failure criterion. As a result of these investigations, suggestions were identified for future research.

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Section: Introductionmentioning

confidence: 99%

Stability Charts for Closely Spaced Strip Footings on Hoek–Brown Rock Mass

et al. 2022

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“…Several reports are published after the pioneering work reported by Stuart [1] using different analytical/numerical methods and experimental observations. The studies offering the understanding of two or multiple interfering footings using analytical/numerical methods use upper and lower bound limit analysis [2][3][4][5][6][7], finite difference method [8][9][10], finite element method [11][12][13][14][15][16][17][18] and analytical method [19,20], the probabilistic method [21] and others [22]. Then several experimental studies [23][24][25][26][27][28][29] have been reported on the interference of surface footings.…”

Section: Introductionmentioning

confidence: 99%

Behavioural Assessment on Influence of Adjacently Placed Strip Footings at Different Embedment Level

Ekbote¹,

Nainegali

Rajhans

et al. 2022

Architecture, Civil Engineering, Environment

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The footings laid in close proximity imposes a definite change in the behaviour of the adjacent footing, subsequently changing the behaviour of the nearby footings. The present study emphasises the behaviour of the nearby strip footings embedded at a different level by adopting the commercially available finite element analysis program, ABAQUS. The load-settlement behaviour, ultimate bearing capacity (UBC), and the failure patterns of adjacent strip footings are assessed by considering the Mohr-Coulomb failure criterion. The UBC is of the nearby footings (left and right) are estimated and represented in terms of interference factors (ξL/ξR ) defined as the UBC of a footing in the presence of adjacent footing to that of same considered for equivalent isolated footing. The results reveal that a significant influence of the adjacent footing is experienced when the spacing between the footings (S/B) is lesser, and they behave as the single footing of greater width at S/B = 0.25 irrespective of the level of embedment depth. Furthermore, the influence of interference increases with the increase in the embedment depth of adjacent footing. It is found that the ξL is significantly more for a lower level of embedment depth, and the same increases with an increase in the embedment depth of the right footing but on the contrary ξR decreases. The increase in the peak interference factor, ξL-max for DL/B = 0.5 is 2.1% and 4.2% when DR/B = 0.75 and DR/B = 1.0, respectively.

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“…In view of the impact of the construction of new buildings on the displacement of subsoil in the vicinity and the facilities located there [6][7][8][9], it is necessary to determine the impact range of this investment [10][11][12][13][14][15][16][17][18][19][20][21] and then subject the buildings located in the affected area to diagnostics [22,23].…”

Section: Introduction 1backgroundmentioning

confidence: 99%

The Use of 3D Numerical Modeling in Conceptual Design: A Case Study

Michalak

Przybysz

2021

Energies

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This article describes the construction of a building with four aboveground floors and one underground floor as part of the ongoing development of Warsaw’s city center. A 3D numerical model was developed to reflect the spatial and structural solutions of the new building based on the design documentation with regard to the outcomes of geotechnical tests, the actual phases of work completed, the results of the geodetic measurements carried out in individual phases of the building implementation, and the characteristics of the existing adjacent buildings. The 3D numerical model was calibrated taking into account the results of the geodetic measurements of the benchmarks stabilized on the adjacent buildings. The numerical models of the building were used to analyze a number of multiple-step variants, taking into account the increase in the number of aboveground floors (from 1 to 4) and underground floors (by 1), as well as the increase in the projected area of the underground part compared to the area of the site designated for development. The paper presents the conclusions of our analyses, which may be helpful to others designing buildings in intensively urbanized areas and guide them in selecting the best solution.

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Upper bound solution for the bearing capacity of two adjacent footings on rock masses

Cited by 13 publications

References 19 publications

Stability Charts for Closely Spaced Strip Footings on Hoek–Brown Rock Mass

Stability Charts for Closely Spaced Strip Footings on Hoek–Brown Rock Mass

Behavioural Assessment on Influence of Adjacently Placed Strip Footings at Different Embedment Level

The Use of 3D Numerical Modeling in Conceptual Design: A Case Study

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