Recent advances in the application of discontinuity layout optimization to geotechnical limit analysis problems

Smith, Colin C.; Gilbert, Matthew; Hawksbee, Samuel; Babiker, Ahmed Faysal A.

doi:10.1201/b17017-75

Cited by 8 publications

(8 citation statements)

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“…Computational time should, on the other hand, be considered as an important parameter. Some of the optimization methods draw attention as they contain new approaches that can be developed to broader applicability, among them we can cite DLO (discrete layout optimization) [2], topology optimization [14] and a technique combining Vanmarcke's spatial averaging with kinematic failure mechanisms [64]. Further studies can help when interpreting, in particular situations, the usefulness of each optimization method.…”

Section: Discussionmentioning

confidence: 99%

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Recent Tendencies in the Use of Optimization Techniques in Geotechnics: A Review

Boumezerane

2022

Geotechnics

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The use of optimization methods in geotechnics dates back to the 1950s. They were used in slope stability analysis (Bishop) and evolved to a wide range of applications in ground engineering. We present here a non-exhaustive review of recent publications that relate to the use of different optimization techniques in geotechnical engineering. Metaheuristic methods are present in almost all the problems in geotechnics that deal with optimization. In a number of cases, they are used as single techniques, in others in combination with other approaches, and in a number of situations as hybrids. Different results are discussed showing the advantages and issues of the techniques used. Computational time is one of the issues, as well as the assumptions those methods are based on. The article can be read as an update regarding the recent tendencies in the use of optimization techniques in geotechnics.

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Section: Discussionmentioning

confidence: 99%

“…Smith et al [2] in a work on the use of discontinuity layout optimization (DLO) showed application of this technique as an alternative to traditional analysis techniques (Figure 1). The method coined DLO originates to a work by Smith and Gilbert [3] where it was applied to optimization of plane plasticity problems.…”

Section: Optimization Methods For Foundationsmentioning

confidence: 99%

Recent Tendencies in the Use of Optimization Techniques in Geotechnics: A Review

Boumezerane

2022

Geotechnics

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“…The first application was focused on geotechnical issues and the analysis of masonry arches [12]. Further research, especially on geotechnical problems, was made, among others, by [13][14][15]. Ongoing research was also focused on the extension to three-dimensional geotechnical issues [16,17].…”

Section: Interaction Criteria Including Local Bucklingmentioning

confidence: 99%

Application of Discontinuity Layout Optimization to Steel Parts and Steel Connections with a Single Bolt

Timmers

2020

Applied Sciences

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Steel connections are designed with components such as bolts, plates, and welds. The proof of the plates loaded in-plane can be made by hand calculations or more realistic with a nonlinear FE-simulation. As an alternative method, a modified version of the discontinuity layout optimization (DLO) procedure is presented in this paper. The modification takes yield zone mechanisms into account. Furthermore, a compression-only contact was implemented to reproduce the bearing behaviour of bolted connections. The DLO procedure was tested on tensile specimens with and without bolts. The obtained collapse mechanisms and ultimate loads were compared to results from the Eurocode EN 1993-1-8, literature, and FE-simulations. Recommendations to the correct discretization of the tested specimens were given. Especially for the bearing behaviour, modification factors, based on a parameter study, were worked out. The DLO procedure reproduced the collapse loads and mechanisms of all considered cases correctly. The obtained bearing capacities are, in most cases, conservative compared to the Eurocode EN 1993-1-8. The presented research can be seen as the basis for future investigations on more complex problems in steel connections.

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“…Linear programming is also used in estimating the failure load of masonry made of rigid blocks considering non-associative friction [ 33 ]. The DLO has been subsequently applied to masonry wall [ 34 ], to retaining walls [ 35 ], in geotechnics [ 36 ], and to the yield-line method for slabs [ 37 ], and several examples of application to different civil engineering problems can be found in [ 38 ]. The computational efficiency of a discrete approach to layout optimization is shown in some recent papers [ 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Parametric Analysis of Failure Loads of Masonry Textures by Means of Discontinuity Layout Optimization (DLO)

2022

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Several masonry structures of cultural and historical interest are made with a non-periodic masonry material. In the case of periodic textures, several methods are available to estimate the strength of the masonry; however, in the case of non-periodic masonry, few methods are available, and they are frequently difficult to use. In the present paper we propose using discontinuity layout optimization (DLO) to estimate the failure load and mechanism of a masonry wall made with non-periodic texture. We developed a parametric analysis to account for the main features involved in the estimation of failure: in particular we considered three different textures (periodic, quasi-periodic, and chaotic), variable height-to-width ratio of the wall (from 0 to 3) and of the blocks (from 0.25 to 1), different mechanical properties of mortar joints and blocks, and possible presence of a load on the top. The results highlight the importance of the parameters considered in the analysis, both on the values of the failure load and on the failure mechanism. Therefore, it is found that DLO can be an useful and affordable method in order to assess the mechanical strength of masonry wall made with non-periodic textures.

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Recent advances in the application of discontinuity layout optimization to geotechnical limit analysis problems

Cited by 8 publications

References 1 publication

Recent Tendencies in the Use of Optimization Techniques in Geotechnics: A Review

Recent Tendencies in the Use of Optimization Techniques in Geotechnics: A Review

Application of Discontinuity Layout Optimization to Steel Parts and Steel Connections with a Single Bolt

Parametric Analysis of Failure Loads of Masonry Textures by Means of Discontinuity Layout Optimization (DLO)

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