Numerical simulation and design of ferritic stainless steel bolted T-stubs in tension

Yapici, Orhan; Theofanous, Marios; Yuan, Hongyong; Dirar, Samir; Afshan, Sheida

doi:10.1016/j.jcsr.2022.107555

Cited by 8 publications

(5 citation statements)

References 40 publications

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“…All joint components were discretised with the eight-noded 3D solid element C3D8R with reduced integration, except for the welds between the web and the flange of the loading T-stub, which were simulated using tie constraints. A finer mesh was employed in areas of high stress gradients like in the vicinity of the bolt holes, and throughout the blind bolt assemblies, whilst 3 elements were used through the thickness of each component to mitigate shear locking [8,19,20].…”

Section: Development Of Fe Modelmentioning

confidence: 99%

Numerical Behaviour of Blind‐Bolted Beam Connections to Square Hollow Sections with Different Infills

Gunes,

Theofanous,

Skalomenos

et al. 2023

ce papers

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This paper reports the development and validation of an advanced FE model that can predict the overall behaviour and failure modes of blind bolted T‐stub to unfilled tube (UT), concrete‐filled tube (CFT) and foam‐filled tube (FFT) joints in tension. The joints investigated were made of S355 Square Hollow Sections (SHS) either empty or with concrete or polyurethane infill, connected to a rigid T‐stub using HB 10 hollow bolts. Associated experimental results are used for model validation purposes. The main modelling assumptions and relevant simulation strategies in terms geometric and material modelling are discussed and the resulting models are shown to accurately replicate the experimentally observed response in terms of yield load, failure load, observed failure modes and available ductility of the connections. The favourable performance of connections employing SHS with a polyurethane infill compared to the empty and concrete filled SHS in terms of both strength and ductility is highlighted.

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Section: Development Of Fe Modelmentioning

confidence: 99%

Numerical Behaviour of Blind‐Bolted Beam Connections to Square Hollow Sections with Different Infills

Gunes,

Theofanous,

Skalomenos

et al. 2023

ce papers

Self Cite

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“…Figure 3 demonstrates a meshing overview of the solid elements. The eight-node 3D solid elements and the reduced integral (C3D8R) were used to deliver high precision at minimal computational cost [33,38,92,99]. Several mesh densities were tested, and eventually, a structured mesh was used with variable densities for each region of the model.…”

Section: Finite Element Modelsmentioning

confidence: 99%

“…In order to accurately capture their out-of-plane flexure and prevent the effect of shear locking, at least three elements were given through the thickness of the T-stub. According to [95][96][97]99], a flange's thickness should have at least two elements across it for bending to be effective. To better simulate the interface between the bolt and the T-stub and to capture contact, a finer mesh was employed around the smaller region of the bolt [99].…”

Section: Finite Element Modelsmentioning

confidence: 99%

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Assessing Effectiveness of Shape Memory Alloys on the Response of Bolted T-Stub Connections Subjected to Cyclic Loading

et al. 2023

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This study presents finite element analysis of double split tee (DST) connections with high-strength steel bolts and coupled split tee sections, to evaluate various cyclic response parameters and elements. The investigation included quantifying connection behavior and hysteretic response, damage indexes, and failure modes. Over 40 specimens were simulated in ABAQUS under cyclic loading, including shape memory alloy (SMA)-built specimens. In the post-analysis phase, the T-stub thickness, the T-stub yield strength, the bolt preload and bolt number, and the stiffener type and stiffener material for the most significant parts of the DST connection were calculated. Simulation results showed that a lower ultimate moment yielded fewer needed stem bolts. The energy dissipation (ED) capacity increased as the horizontal distance between the stem bolts decreased. Additionally, increasing the strength of the bolt and T-stub by 15% resulted in a 3.86% increase in residual displacement (RD) for the bolt and a 1.73% decrease in residual displacement for the T-stub. T-stub stiffeners enhanced ED capacity by 31.7%. SMA materials were vulnerable to mode 1 failure when used in T-stubs, bolts, or stiffeners. However, the use of SMA increased the rate of energy dissipation. Adding stiffeners to the T-stubs altered the failure indexes and improved the pattern of failure modes. In addition, stiffeners decreased the rupture and pressure indexes. As a result, the failure index of a T-stub shifted from brittle failure to ductile failure.

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“…By comparing the experimental results with EC3 design formulas, it was determined that the direct application of EC3 design formulas is not feasible for predicting the yield-bearing capacity of T-stub connections constructed using high-strength steel. The numerical modeling methods for T-stub connections employing stainless steel bolts were explored by YAPICI O [18,19]. The optimal modeling approach was determined, and an analysis was conducted on the mechanical performance of T-stub connections with stainless steel bolstering.…”

Section: Introductionmentioning

confidence: 99%

Damage Evaluation of T-Stub Connected to Hollow Section Column Using Blind Bolts under Tension

Bu,

Xiao,

et al. 2023

Buildings

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The quantitative calculation and evaluation of seismic damage play a crucial role in ensuring structural safety, conducting performance-based structural analysis, and implementing seismic strengthening measures. However, there is limited research on the damage performance of blind-bolted T-stub steel connections used extensively in prefabricated buildings. In this study, the tensile sub model of a blind-bolted T-stub steel connection in a beam–column joint is investigated. The influence of the flange and web thickness of the T-stub connector, as well as the shear-loaded connecting bolts on the web of the T-stub, on the tensile performance of the sub model are considered. Four tensile destructive tests are conducted on a T-stub connector connected to a hollow section column using blind bolts. The experimental results, including failure modes, force–displacement curves, and strain development in the hollow section column and T-stub, are discussed and analyzed in this study. The test results reveal three main failure modes for this tensile substructure: the plastic deformation of the hollow section column, the bending fracture of the T-stub flange, and the fracture of the T-stub web bolt holes due to compression. Furthermore, a ductile damage finite element analysis method is employed to simulate the fracture damage process of the substructure, and the corresponding damage index is calculated using the typical Park–Ang damage model for evaluation, showing good agreement with the damage classification levels specified in FEMA.

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Numerical simulation and design of ferritic stainless steel bolted T-stubs in tension

Cited by 8 publications

References 40 publications

Numerical Behaviour of Blind‐Bolted Beam Connections to Square Hollow Sections with Different Infills

Numerical Behaviour of Blind‐Bolted Beam Connections to Square Hollow Sections with Different Infills

Assessing Effectiveness of Shape Memory Alloys on the Response of Bolted T-Stub Connections Subjected to Cyclic Loading

Damage Evaluation of T-Stub Connected to Hollow Section Column Using Blind Bolts under Tension

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