Undrained seismic bearing capacity of strip footing placed on homogeneous and heterogeneous soil slopes by finite element limit analysis

Keshavarz, Amin; Beygi, Majid; Vali, Ramin

doi:10.1016/j.compgeo.2019.103094

Cited by 35 publications

(14 citation statements)

References 23 publications

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“…To verify the reliability of the present model, the LB and UB results were compared with the present limit equilibrium method. The present model of D f /B 0 = 0, i = 30 0 andc 1 /c 2 = 1 with different seismic coefficients k h were compared with the previous LB and UB results , FEM results (Cinicioglu and Erkli 2018) and FELA results (Keshavarz et al 2019). It can be seen in Fig.…”

Section: Comparisonsmentioning

confidence: 96%

Seismic bearing capacity of shallow strip footing embedded in slope resting on two-layered soil

Debnath

2021

Studia Geotechnica Et Mechanica

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In this paper, the limit equilibrium method with the pseudo-static approach is developed in the evaluation of the influence of slope on the bearing capacity of a shallow foundation. Particle swarm optimisation (PSO) technique is applied to optimise the solution. Minimum bearing capacity coefficients of shallow foundation near slopes are presented in the form of a design table for practical use in geotechnical engineering. It has been shown that the seismic bearing capacity coefficients reduce considerably with an increase in seismic coefficient. Be sides, the magnitude of bearing capacity coefficients decreases further with an increase in slope inclination.

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Section: Comparisonsmentioning

confidence: 96%

Seismic bearing capacity of shallow strip footing embedded in slope resting on two-layered soil

Debnath

2021

Studia Geotechnica Et Mechanica

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“…In addition, a horizontal seismic coefficient k h is set for the footing and slope domain to represent the seismic action. To verify the reliability of this FELA model, the LB and UB results of present models of b/B = 0, D/B = 0, b = 30°, c u1 /(gB) = 2.5, and c u1 /c u2 = 1 with different seismic coefficients k h are compared with previous FEM results (Cinicioglu and Erkli, 2018) and FELA results (Keshavarz et al, 2019). It can be observed in Figure 2 that FEM results and FELA results totally locate within the UB and LB results and approximate the average value of UB and LB results at any k h .…”

Section: Fela Numerical Modelmentioning

confidence: 97%

“…On this basis, a comprehensive design chart to estimate the seismic bearing capacity of footings near slopes was reported by Cinicioglu and Erkli (2018) with FEM. Keshavarz et al (2019) adopted FELA to predict the seismic bearing capacity of strip footings located on the top of slopes. More recently, the issue has been further extended to the case of the sloping ground (Raj et al, 2018(Raj et al, , 2019a(Raj et al, , 2019b.…”

Section: Introductionmentioning

confidence: 99%

Undrained seismic bearing capacity of strip footings horizontally embedded in two-layered slopes

Zhao

2020

Earthquake Spectra

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This study investigated the undrained seismic bearing capacity of strip footings embedded in two-layered slopes by finite element limit analysis (FELA); in particular, a pseudostatic method was specified to seismic loads. Lower bound theory (LB), upper bound theory (UB), and adaptive meshing technique are employed for exploring the effect of the shear strength ratio of top layer and bottom layer, cu1/ cu2; the horizontal embedment depth of footings, b/ B; the footing locations (in bottom layer or top layer); seismic coefficient kh; and the slope gradient β on seismic bearing capacity. Results indicated that the seismic bearing capacity would increase with the growth of horizontal embedment depth of footings. The comparison between the predictions obtained from the proposed method and the existing method was presented, and the failure mechanisms are further summarized.

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“…Slope stability [11][12][13][14] is an international problem and has been studied for decades. With the development of theoretical sciences and computer technologies, finite element method (FEM), extended finite element method (XFEM), limited equilibrium method (LEM), discrete element method (DEM), general particle dynamics (GPD), and peridynamics (PD) have been developed.…”

Section: Introductionmentioning

confidence: 99%

Soil‐Rock Slope Stability Analysis under Top Loading considering the Nonuniformity of Rocks

Huang

Yao

Wang

et al. 2020

Advances in Civil Engineering

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Soil-rock slopes are widely distributed in central or western China. With the development of transportation, many subgrades are being built on mountainsides and therefore, slope stability has to be estimated under high loadings. To obtain better estimation results, a new rock contour establishing algorithm was developed, capable of considering interlock effect between rocks. Then, computed tomography (CT) and unconfined triaxial tests with ring top loadings were conducted. Based on rock distribution characteristics (obtained by CT photos) and the appearance of shear failure surfaces in slopes under ring top loadings, four rock skeleton status and five shear failure surface developing models were introduced. Based on the developed rock contour establishing algorithm, ten groups (twelve models per group) were established and calculated by finite element method (FEM). After this, normalized ultimate loading increasing multiple N, which was the ultimate loading ratio of rock-containing slope to uniform soil slope, was introduced to evaluate the influence of rock distributions on slope stability. The value of N was increased with the increase of rock content due to rock skeleton status. The values of N in slopes with angular rocks were about three times higher than those with round rocks which was due to complex geometric shape and distribution characteristics of angular rocks. Then, considering different slope angles (50°–60°), rock contents (0%–60%), and rock shapes (round and angular), the ultimate loading increasing multiple N of soil-rock slopes under high loadings was calculated and suggested for engineering designs. Finally, based on the failure surfaces of numerical modes, three typical failure modes were developed, which could be reference for designers to deal with slopes.

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Undrained seismic bearing capacity of strip footing placed on homogeneous and heterogeneous soil slopes by finite element limit analysis

Cited by 35 publications

References 23 publications

Seismic bearing capacity of shallow strip footing embedded in slope resting on two-layered soil

Seismic bearing capacity of shallow strip footing embedded in slope resting on two-layered soil

Undrained seismic bearing capacity of strip footings horizontally embedded in two-layered slopes

Soil‐Rock Slope Stability Analysis under Top Loading considering the Nonuniformity of Rocks

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