The bearing capacity and failure mechanism of a vertically loaded strip footing placed on the top of slopes

Zhou, Haizuo; Zheng, Gang; Yin, Xin; Jia, Rui; Yang, Xinyu

doi:10.1016/j.compgeo.2017.08.009

Cited by 89 publications

(29 citation statements)

References 24 publications

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“…Later, using the same methods, the seismic bearing capacity of strip footings on a sloping ground surface and embankments has been investigated by Chakraborty and Kumar [33] and Chakraborty and Mahesh [34]; respectively. More recently, Zhou et al [35] determined the ultimate seismic bearing capacity and the collapse mechanisms for strip footings located adjacent to cohesivefrictional soil slopes by using the DLO method. Under undrained conditions, Cinicioglu and Erkli [36] applied finite element software PLAXIS to investigate the seismic bearing capacity of strip footings resting on or near slopes.…”

Section: Introductionmentioning

confidence: 99%

Seismic Bearing Capacity of Strip Footings on Cohesive Soil Slopes by Using Adaptive Finite Element Limit Analysis

Luo

Zhao

Xiao

et al. 2019

Advances in Civil Engineering

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By employing adaptive finite element limit analysis (AFELA), the seismic bearing capacity of strip footing on cohesive soil slopes are investigated. To consider the earthquake effects, the pseudostatic method is used. The upper and lower bounds for the seismic bearing capacity factor (Nce) are calculated, and the relative errors between them are found within 3% or better by adopting the adaptive mesh strategy. Based on the obtained results, design tables and charts are provided to facilitate engineers use, and the effects of footing position, undrained shear strength, slope angle, slope height, and pseudostatic acceleration coefficient are studied in detail. The collapse mechanisms are also discussed, including overall slope failure and foundation failure.

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Section: Introductionmentioning

confidence: 99%

Seismic Bearing Capacity of Strip Footings on Cohesive Soil Slopes by Using Adaptive Finite Element Limit Analysis

Luo

Zhao

Xiao

et al. 2019

Advances in Civil Engineering

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“…An advantage of this method is that it works without assuming the failure mode a priori. The bearing capacity of shallow foundations on slopes under static conditions has successfully been assessed by Leshchinsky (2015), Leshchinsky and Xie (2017) and Zhou et al (2018) using the DLO procedure. Fig.…”

Section: Methodsmentioning

confidence: 99%

“…forces associated with soil self-weight. Zhou et al (2018) defined the threshold between bearing capacity and slope stability mechanisms based on whether the soil weight contributes to the passive resistance or acts as a destabilizing force, and six failure modes were observed, as shown in Fig. 4.…”

Section: Applicability Of the Superposition Methods For Assessing Bearmentioning

confidence: 99%

“…4. Illustration of the potential failure mechanism of footings on slopes (Zhou et al 2018). D r a f t Kumar and Chakraborty (2013) Kumar and Rao (2003) This study D r a f t Tables Table 1. Assessment of the superposition approach to bearing capacity on level ground.…”

Section: Design Chartsmentioning

confidence: 99%

“…They generally assumed that failure occurred directly through the slope face (i.e., assuming a stable slope of D r a f t Technical Note infinite height), and ignored the complex relationships among slope geometries, material properties, and seismic loads that can also influence the realized failure mechanisms. Recent studies have demonstrated that static bearing capacity near slopes is a function of the soil properties and geometric parameters (Leshchinsky 2015;Leshchinsky and Xie 2017;Zhou et al 2018), which often results in complex failure mechanisms. The presence of earthquake loading adds more complexity to the problem.…”

Section: Introductionmentioning

confidence: 99%

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Ultimate seismic bearing capacities and failure mechanisms for strip footings placed adjacent to slopes

et al. 2019

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Assessment of the ultimate bearing capacity of foundations adjacent to slopes is complex as it is highly dependent on the slope geometry and soil properties. Seismic loading may impact both the critical failure mechanism and its associated bearing capacity. The existing approaches for analyzing the seismic bearing capacity of footings near slopes typically employ coefficients developed to fit the conventions of Terzaghi’s bearing capacity equation, herein referred to as the “superposition method.” In this study, a rigorous assessment of the seismic bearing capacity is performed using an upper-bound limit state plasticity framework known as discontinuity layout optimization (DLO), which makes few prior assumptions concerning the failure geometry. Results show that soil properties, slope configuration, and pseudostatic seismic loading all influence the realized failure mechanism and associated bearing capacity. The use of bearing capacity coefficients that fit within the conventional superposition method may underestimate limit loads when the underlying soil provides a relative increase in resistance, but may greatly overestimate bearing capacity when the self-weight of the soil is destabilizing in nature. A set of design charts using direct computational methods for a variety of geometric, geotechnical, and seismic conditions is provided.

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Bearing capacity and failure mechanism of strip footings lying on slopes subjected to various rainfall patterns and intensities

Zhang,

Gu,

2023

Geological Journal

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Footing on slope is a prevalent construction encountered in geotechnical engineering, and its safety is receiving increased attention. A natural rainfall event will inevitably have adverse influences on the stability and bearing capacity of strip footings lying on slopes; however, the conventional practice to simulate the rainfall is realized by varying the soil moisture content and the actual rainfall characteristics cannot be fully reflected. As a result, the finite element (FE) software ABAQUS is employed in this study to model the temporally varying rainfall, and the bearing capacity, as well as failure mode of the strip footing placed at the top of slopes, is estimated accordingly. A series of FE analyses are carried out to quantify the influences of rainfall pattern, rainfall intensity, soil strength properties (i.e., effective cohesion c′ and effective friction angle φ′) and several geometric parameters associated with the location of embedded footing with B in width, such as the edge distance ratio L/B and the embedded depth ratio D/B. Results show that the bearing capacity will be decreased and the failure mode evidently changes under rainfall condition. Moreover, it is noted that the rainfall pattern produces less substantial impact on the bearing capacity and failure mode, compared with the rainfall intensity.

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The bearing capacity and failure mechanism of a vertically loaded strip footing placed on the top of slopes

Cited by 89 publications

References 24 publications

Seismic Bearing Capacity of Strip Footings on Cohesive Soil Slopes by Using Adaptive Finite Element Limit Analysis

Seismic Bearing Capacity of Strip Footings on Cohesive Soil Slopes by Using Adaptive Finite Element Limit Analysis

Ultimate seismic bearing capacities and failure mechanisms for strip footings placed adjacent to slopes

Bearing capacity and failure mechanism of strip footings lying on slopes subjected to various rainfall patterns and intensities

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