ON the performance of isogeometric analysis for elasto-plastic plane stress problems

Kazemi, H. S.; Tavakkoli, S. M.

doi:10.1007/s42107-018-0007-6

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…In this research, generalized Newton–Raphson (N-R) method is utilized to solve the non-linear system of equations. For more details on elasto-plastic analysis of plane stress problems, previous studies (Kazemi and Tavakkoli, 2018; Owen and Hinton 1980) can also be referred.…”

Section: Numerical Modeling Of Ssdsmentioning

confidence: 99%

A numerical study on optimum shape of steel slit dampers

Aminzadeh

Kazemi

Tavakkoli

2020

Advances in Structural Engineering

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Steel slit dampers are among the passive energy dissipating devices that have been proposed to improve seismic performance of steel structures. Several experimental and numerical studies have also been carried out to investigate capacity of the dampers in energy dissipation. In this article, a numerical model is developed to obtain optimum boundary shape of the dampers. To achieve this, isogeometric analysis method is utilized as a powerful tool in precise modeling of complex geometries for the purpose of non-linear analysis of the dampers. A conventional steel slit damper shape is modeled by non-uniform rational B-splines, and then, the shape is optimized with the aim of maximizing the structural energy dissipation under a volume constraint. To verify the model, measurements of an experimental test in literature are compared with the model results. A mathematical-based approach is employed for the optimization process and analytical shape sensitivity analysis is performed. As a result of optimization process, a new steel slit damper is suggested and its performance is evaluated via comparing with other shapes suggested in the literature.

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Section: Numerical Modeling Of Ssdsmentioning

confidence: 99%

A numerical study on optimum shape of steel slit dampers

Aminzadeh

Kazemi

Tavakkoli

2020

Advances in Structural Engineering

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“…In this paper, based on a coal mine tunnel under construction as the background, the tunnel exit portal section buried depth is shallow, geological conditions are not ideal, the field construction process found that the tunnel portal section of multiple surrounding rock settlement is too large, and deformation is large, prone to collapse and roof fall accidents [9][10][11][12]. The buried depth of this section is 3.5 m to 16 m, and the slope is 31.3%.…”

Section: Introductionmentioning

confidence: 99%

Study on Supporting Protection of Tunnel Opening near a Rock Layer under Elastic Deformation of Surrounding Rock

Zhi-gang

2021

Geofluids

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Due to the limitation of geological conditions and route alignment, tunnel engineering will inevitably pass through special sections such as shallow buried section, broken rock layer, and loss and weak rock stratum. Tunnel construction in these special sections will easily lead to tunnel collapse, landslide of portal slope, excessive deformation of supporting structure, and even deformation and damage accidents, which are high-incidence areas of engineering safety accidents. In this paper, a 3D numerical model is established based on a practical engineering to analyze the deformation and stress variation of surrounding rock of the tunnel with the in-advance support technology. According to the monitoring results of the actual project, the deformation law of the soft rock section at the tunnel entrance is mastered. The deformation of surrounding rock of the tunnel under the support condition of changing the three main parameters, such as ring spacing, pipe diameter, and pipe length, is analyzed, and the effect of controlling the deformation of surrounding rock with different parameters is studied. The deformation, stress characteristics, and plastic zone distribution of surrounding rock by a single side wall guide method and ring excavation and retaining core soil method in advance support are numerically simulated and studied.

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Maximum energy dissipation for elasto-plastic plates via isogeometric shape optimization

Aminzadeh

Tavakkoli

2019

Engineering with Computers

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ON the performance of isogeometric analysis for elasto-plastic plane stress problems

Cited by 4 publications

References 12 publications

A numerical study on optimum shape of steel slit dampers

A numerical study on optimum shape of steel slit dampers

Study on Supporting Protection of Tunnel Opening near a Rock Layer under Elastic Deformation of Surrounding Rock

Maximum energy dissipation for elasto-plastic plates via isogeometric shape optimization

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