Automatic rationalization of yield-line patterns identified using discontinuity layout optimization

He, Lihua; Gilbert, Matthew

doi:10.1016/j.ijsolstr.2015.12.014

Cited by 27 publications

(11 citation statements)

References 14 publications

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“…A gradient-based adaptive solution method (ADLO) was presented in [18]. In addition to the plane plasticity problems, the DLO was also extended to analyze reinforced concrete slabs in [19][20][21]. For practical application of the before mentioned problems, the software LimitState [22] was invented.…”

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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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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“…Therefore, it is very important to reach a comprehensive understanding of its structural behavior in terms of designing a new slab or in case of assessing old existing slab to reveal its hidden capacity [2]. The work in this paper is modeling of different slabs using LimitState Slab software to obtain the failure mechanism, which can be an effort and time-consuming procedure when using hand calculations especially in case of a complex floor plan and different types of supports [3].…”

Section: Introductionmentioning

confidence: 99%

Assessment of reinforced concrete slab of historical structures by the yield-line method

Mahrouseh

Orbán

2021

Pollack

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The study demonstrates and evaluates an approach in the structural analysis phase when assessing reinforced concrete slabs.Due to different values of a parameter in the tests’ results, 10 models was crated for the first case study and 4 models for the second one.In order to compare the results in terms of the flexural bearing capacity, the slabs were analyzed by using elastic finite element analysis and yield-line analysis.Comparing the results shows that minor modification in the parameters associated with bearing capacity and the boundary conditions can affect the adequacy factor considerably, while the parameters those relate to boundary conditions affect the distribution of the yield lines.

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“…In this work, we investigate the concept of r adaptivity, in combination with h adaptivity, and assess the potential of this approach for increasing computational efficiency in 3D limit analysis. Pioneered in the earlier work of Johnson (1995) and more recently explored for 2D limit analysis (Milani and Lourenço, 2009;Hambleton and Sloan, 2013;Milani, 2015;He and Gilbert, 2016;Muñoz et al, 2018), r adaptivity improves the computed limit load by explicitly optimizing the nodal positions that control the locations of possible velocity discontinuities. Because relatively coarse meshes with suitably placed edges (velocity discontinuities) are often sufficient to obtain accurate solutions, kinematic FELA and DLO enriched with r adaptivity of-fers a promising pathway for improving efficiency, as previously demonstrated for 2D formulations.…”

Section: Introductionmentioning

confidence: 99%

An r-h adaptive kinematic approach for 3D limit analysis

Shi

Hambleton

2020

Computers and Geotechnics

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This paper explores a pathway for increasing efficiency in numerical 3D limit analysis through r -h adaptivity, wherein nodal positions (r ) and element lengths (h) are successively refined. The approach uses an iterative, nested optimization procedure involving three components: (1) determination of velocities for a fixed mesh of rigid, translational elements (blocks) using secondorder cone programming; (2) adaptation of nodal positions using non-linear optimization (r adaptivity); and (3) subdivision of elements based on the magnitude of the velocity jumps (h adaptivity). Examples show that the method can compute reasonably accurate limit loads at relatively low computational cost.

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Automatic rationalization of yield-line patterns identified using discontinuity layout optimization

Cited by 27 publications

References 14 publications

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

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

Assessment of reinforced concrete slab of historical structures by the yield-line method

An r-h adaptive kinematic approach for 3D limit analysis

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