GBT-based time-dependent analysis of steel-concrete composite beams including shear lag and concrete cracking effects

Henriques, David; Gonçalves, Rodrigo; Sousa, Carlos; Camotim, Dinar

doi:10.1016/j.tws.2020.106706

Cited by 15 publications

(7 citation statements)

References 29 publications

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“…Vieira et al [20] proposed a procedure to calculate cross-section deformation modes of steelconcrete composite bridge. Henriques et al [21] presented and validated a finite element that combines the effects of concrete creep and cross-section deformation, namely distortion and shear lag. Barrientos et al [22] proposed a one-dimensional element for thin-walled beams considering torsion, deformation and shear hysteresis.…”

Section: Introductionmentioning

confidence: 99%

A one-dimensional high-order dynamic model for twin-cell box girders with deformable cross-section

Zhu,

Zhang,

Zeng

2024

J. vibroeng.

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A one-dimensional high-order dynamic model for single-box twin-cell box girders is presented together with the pattern recognition algorithm. The model takes into account the deformable cross-section and can accurately predict its 3D dynamic behaviors. The cross-section deformation is captured by basis functions satisfying displacement continuity condition, which is essential to construct the initial model formulation based on the Hamilton principle. The axial variation patterns of generalized coordinates are decoupled by solving the eigenvalue problem. On this basis, the combinations of basis functions are obtained to bring out cross-section deformation. The cross-section deformation, hierarchically organized and physically meaningful, are used to update the basis functions in the reconstructed high-order model. Numerical analysis has verified the accuracy and applicability of the reconstructed one-dimensional high-order model.

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Section: Introductionmentioning

confidence: 99%

A one-dimensional high-order dynamic model for twin-cell box girders with deformable cross-section

Zhu,

Zhang,

Zeng

2024

J. vibroeng.

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Section: Introductionmentioning

confidence: 99%

“…The above studies do not consider the influence of damage to strengthened beams [14,15], although they are often damaged. Damage affects the creep of concrete materials and components [14,15]. The study by Farah, M., et al showed a drop in Young's modulus and residual strength after creep loadings in partially damaged beams, implying the development of a state of weakness in beams subjected to an increasing creep load [16].…”

Section: Introductionmentioning

confidence: 99%

Numerical Method for Creep Analysis of Strengthened Fatigue-Damaged Concrete Beams

et al. 2023

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Fatigue-damaged concrete improves the load-bearing capacity of components by increasing the cross section. However, the creep performance of damaged components after the repair has received less attention. Thus, this study establishes a constitutive creep model of strengthened fatigue-damaged concrete on the basis of damage mechanics and numerically simulates the strengthened component. The accuracy of the proposed model is verified by conducting creep tests on fatigue-damaged concrete beams. According to the numerical simulation results, increasing the section height profoundly affects the ability to control their creep deflection. The incremental creep deflection of the beams with a strengthened section height of 50, 100, and 150 mm loaded for 365 days decreased by 0.107, 0.228, and 0.326 mm, respectively, compared with the unstrengthened damaged beam. Moreover, this reinforcement method excellently controls the deflection of the damaged components under a negative bending moment. The model can forecast the creep deformation of undamaged components or damaged components after being strengthened, which facilitates structural maintenance and decision-making about reinforcement.

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“…This increased computational cost stems from the need to include many deformation modes in the analysis, leading to (i) DOF numbers sometimes comparable to those required by similarly accurate shell element models and (ii) large and dense element stiffness matrices. Although it is possible to partially circumvent these difficulties [8,[10][11][12][13][14], the computational efficiency, versatility and generality of shell finite elements cannot be achieved. This paper, which summarises work recently published in [15][16][17], presents a more general and efficient approach, combining genuine shell and GBT-based (beam) finite elements.…”

Section: Introductionmentioning

confidence: 99%

Combining Shell and GBT‐based Finite Elements – the Best of Both Worlds?

Manta¹,

Gonçalves²,

Camotim³

2022

ce papers

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A general and efficient approach to model thin‐walled members and frames with complex geometries (including tapered and perforated members) is proposed, combining standard shell and GBT‐based (beam) finite elements. Each element type is employed where it is most effective: (i) shell elements in plastic and geometrically complex zones, and (ii) GBT elements in prismatic and elastic zones. After providing a brief overview of the finite elements employed, several illustrative numerical examples are presented and discussed, in order to show the capabilities and potential of the proposed approach – they concern linear static, bifurcation (linear stability – calculation of buckling loadings and mode shapes), vibration (calculation of natural frequencies and vibration mode shapes), dynamic and first‐order plastic zone analyses. These numerical examples involve members with tapered segments and/or perforations and frames with complex joint geometries. For validation and comparison purposes, full shell finite element results are provided – in all cases, an excellent match is obtained.

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GBT-based time-dependent analysis of steel-concrete composite beams including shear lag and concrete cracking effects

Cited by 15 publications

References 29 publications

A one-dimensional high-order dynamic model for twin-cell box girders with deformable cross-section

A one-dimensional high-order dynamic model for twin-cell box girders with deformable cross-section

Numerical Method for Creep Analysis of Strengthened Fatigue-Damaged Concrete Beams

Combining Shell and GBT‐based Finite Elements – the Best of Both Worlds?

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