Reliability-based design for geotechnical engineering: An inverse FORM approach for practice

Ji, Jian; Zhang, Chunshun; Gao, Yufeng; Kodikara, Jayantha

doi:10.1016/j.compgeo.2019.02.027

Cited by 124 publications

(60 citation statements)

References 22 publications

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“…However, uncertainty of engineering geological conditions was not taken into account in this study. Reliability analysis method, like the first-order reliability method [35,36], should be employed to extend this study to practical engineering.…”

Section: Discussionmentioning

confidence: 99%

Numerical Study on Zonal Disintegration of Deep Rock Mass Using Three‐Dimensional Bonded Block Model

Tang

Xie

et al. 2019

Advances in Civil Engineering

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Zonal disintegration, a phenomenon of fractured zones and intact zones distributed alternately in deep rock mass, is different from the excavation-damaged zone of shallow rock mass. In this study, bonded block model of 3DEC was employed to study the fracture mode and origination condition of zonal disintegration. Initiation, propagation, and coalescence progress of fracture around the roadway boundary under different triaxial stress conditions are elaborated. Numerical simulation demonstrated that zonal disintegration may occur when the direction of maximum principal stress is parallel to the roadway axis. It is interesting to find that the fracture around the roadway boundary traced the line of a spiral line, while slip-line fractures distributed apart from the roadway boundary. The extent of the alternate fracture zone decreased as the confining pressure increased, and alternate fracture zone was no longer in existence when the confining pressure reaches a certain value. Effects of roadway shape on zonal disintegration were also studied, and the results indicated that the curvature of the fracture track line tends to be equal to the roadway boundary in shallow surrounding rock of the roadway, while the fractures in deep surrounding rock seems unaffected by the roadway shape. Those findings are of great significance to support design of deep underground openings.

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Section: Discussionmentioning

confidence: 99%

Numerical Study on Zonal Disintegration of Deep Rock Mass Using Three‐Dimensional Bonded Block Model

Tang

Xie

et al. 2019

Advances in Civil Engineering

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“…At the same time, the method also assumes that the antisliding safety factors on the sliding surface of each soil strip are the same and are equal to the average safety factor of entire sliding surface. e Bishop strip method is widely used in solving the safety factor of slope stability engineering because the calculation results are more realistic [22][23][24][25].…”

Section: Methods Introductionmentioning

confidence: 99%

Theoretical Investigation of the Sliding Instability and Caving Depth of Coal Wall Workface Based on the Bishop Strip Method

Kang

et al. 2019

Advances in Civil Engineering

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As mining height increases, the influence of coal wall caving on safety production becomes stronger. There is no systematic and effective method to analyse the risk of coal wall caving and its slip caving depth. First, this paper established the Bishop mechanical model of sliding instability of coal wall, and then it deduced the general equation of a safety factor for every slip surface, which can be used to judge the stability of the coal body on the slip surface. Moreover, taking the 8102 workface in the Wulonghu Mine, China, as an example, this paper evaluated the calculation method of slip surface safety factor in detail and obtained the critical slip surface position and the maximum slip depth of a coal wall. Overall, the results showed that the maximum slip depth based on the Bishop strip method is more consistent with the measured data compared with other methods and thus has strong significance and practical engineering value for selecting the most suitable method and its parameters of regulating coal wall caving.

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“…Santos et al [23] used FORM based ant colony optimization (ACO) algorithm for reliability-based design optimization of geosynthetic-reinforced soil walls. Ji et al [24] used inverse FORM approach for reliabilitybased design in geotechnical engineering. Raviteja and Basha [25] presented a target reliability-based design optimization (TRBDO) approach of V-shaped anchor trenches for municipal solid waste (MSW) landfills.…”

Section: Introductionmentioning

confidence: 99%

Reliability-based optimization of geotechnical design using a constrained optimization technique

Mahmood

2020

SN Appl. Sci.

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Uncertainty and risk are inherent in geotechnical engineering. Reliability-based optimization (RBO) is a methodology that determines the best design solution according to certain design criteria while explicitly considering the effects of uncertainty. RBO ensures a design that is economical as well as reliable in the presence of uncertainties. This paper suggests a direct method for RBO of geotechnical systems by coupling reliability assessment and cost minimization. RBO is proposed as a double-loop (or nested-loop) constrained optimization problem, with cost optimization of geotechnical system through the outer loop repeatedly calling the inner reliability evaluation loop. First-order reliability method is used to compute the reliability index. An algorithm based on constrained optimization is proposed. MATLAB's constrained optimization function, fmincon, is used in two loops: the outer loop to minimize the cost of geotechnical system, and the inner loop to minimize the reliability index to a target value while satisfying geotechnical design requirements. The proposed method is employed to obtain the optimal design of a gravity retaining wall, and compared with other methods, and found to be robust, accurate and feasible.

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Reliability-based design for geotechnical engineering: An inverse FORM approach for practice

Cited by 124 publications

References 22 publications

Numerical Study on Zonal Disintegration of Deep Rock Mass Using Three‐Dimensional Bonded Block Model

Numerical Study on Zonal Disintegration of Deep Rock Mass Using Three‐Dimensional Bonded Block Model

Theoretical Investigation of the Sliding Instability and Caving Depth of Coal Wall Workface Based on the Bishop Strip Method

Reliability-based optimization of geotechnical design using a constrained optimization technique

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