Elastic shear buckling coefficients for diagonally stiffened webs

Martins, João Pedro; Cardoso, Hermano de Sousa

doi:10.1016/j.tws.2021.108657

Cited by 4 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on these simplifications, an initial parametric study was performed where the following parameters were varied: influence of the panels' aspect ratio (α = a/b = a/hw), geometric slenderness of the web (hw/tw), relation Aflange/Aweb, the slenderness of the stiffener (hs/ts). From this preliminary analysis, it was concluded that the inclination of the diagonal stiffener plays an important role in the ultimate strength of diagonally stiffened web panels (a similar conclusion was made in [1] for the influence of the inclination in the elastic critical stress).…”

Section: Initial Parametric Studysupporting

confidence: 60%

“…Over the years, the topic of diagonally stiffened webs in steel I-girders has earned much less attention than 'classical' stiffening options. Most of the works found in the literature are limited to the obtention of the elastic critical stress [1] [3] [4] [5].…”

Section: Brief Literature Revisionmentioning

confidence: 99%

“…On the other hand, the compression field is the mechanism that ultimately triggers the shear buckling. When placed along the compression diagonal, the stiffener increases the out-of-plane bending stiffness of the web leading to higher critical stresses [1], i.e., lowering the web's slenderness and allowing higher rates of material exploitation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ultimate Resistance of Diagonally Stiffened Thin Steel Webs in I‐girders

2022

View full text Add to dashboard Cite

A common structural feature in steel bridges is the use of twin‐I‐girders as the main structural elements. These can reach large dimensions and high weight presenting high values of local slen‐derness resulting in reduced resistance values due to local buckling of the web. This paper explores alternative structural solutions to enhance the stability of slender webs in steel bridges. The central concept to be analyzed is adding a diagonal stiffener able to transfer the shear loading near the supports, avoiding the shear buckling of the web. One problem with this solution is that welding may not be suitable as it introduces residual stresses and local distortion of the web, thus eliminating the potential benefits of the diagonal stiffener. To characterize the ultimate behavior of I‐girders, an experimental study was envisaged and published by the authors and now is used to calibrate a numerical model. The main goal of the calibrated numerical is to develop a parametric study of diagonally stiffened I‐girders which ultimately will allow to propose an analytical model to compute the ultimate load.

show abstract

Section: Initial Parametric Studysupporting

confidence: 60%

Section: Brief Literature Revisionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultimate Resistance of Diagonally Stiffened Thin Steel Webs in I‐girders

2022

View full text Add to dashboard Cite

show abstract

“…Martins and Cardoso [14] investigated the effect of the torsional rigidity of stiffeners on the elastic buckling stress. Based on a nonlinear regression analysis of a large number of numerical simulation results, Equations ( 11) and ( 12) were provided to predict the shear buckling coefficients of open and closed diagonally stiffened plates, respectively.…”

Section: Buckling Coefficient Of Diagonally Stiffened Platementioning

confidence: 99%

“…Yuan et al [13] considered the flexural rigidity of the open diagonal stiffeners, and studied the shear behavior of diagonally stiffened stainless-steel girders using the finite element (FE) software. Martins and Cardoso [14] also investigated how the torsional stiffness of closed-section stiffeners affects the shear buckling behavior of diagonally stiffened plates.…”

Section: Introductionmentioning

confidence: 99%

Machine Learning-Based Prediction of Elastic Buckling Coefficients on Diagonally Stiffened Plate Subjected to Shear, Bending, and Compression

Yang

2023

Sustainability

View full text Add to dashboard Cite

The buckling mechanism of diagonally stiffened plates under the combined action of shear, bending, and compression is a complex phenomenon that is difficult to describe with simple and clear explicit expressions. Predicting the elastic buckling coefficient accurately is crucial for calculating the buckling load of these plates. Several factors influence the buckling load of diagonally stiffened plates, including the plate’s aspect ratio, the stiffener’s flexural and torsional rigidity, and the in-plane load. Traditional analysis methods rely on fitting a large number of finite element numerical simulations to obtain an empirical formula for the buckling coefficient of stiffened plates under a single load. However, this cannot be applied to diagonally stiffened plates under combined loads. To address these limitations, several machine learning (ML) models were developed using the ML method and the SHAP to predict the buckling coefficient of diagonally stiffened plates. Eight ML models were trained, including decision tree (DT), k-nearest neighbor (K-NN), artificial neural network (ANN), random forest (RF), AdaBoost, LightGBM, XGBoost, and CatBoost. The performance of these models was evaluated and found to be highly accurate in predicting the buckling coefficient of diagonally stiffened plates under combined loading. Among the eight models, XGBoost was found to be the best. Further analysis using the SHAP method revealed that the aspect ratio of the plate is the most important feature influencing the elastic buckling coefficient. This was followed by the combined action ratio, as well as the flexure and torsional rigidity of the stiffener. Based on these findings, it is recommended that the stiffener-to-plate flexural stiffness ratio be greater than 20 and that the stiffener’s torsional-to-flexural stiffness ratio be greater than 0.4. This will improve the elastic buckling coefficient of diagonally stiffened plates and enable them to achieve higher load capacity.

show abstract

Buckling analysis of structural steel panel with multiple configuration of stiffeners

Karthic

Harish

et al. 2023

Materials Today: Proceedings

View full text Add to dashboard Cite

Elastic shear buckling coefficients for diagonally stiffened webs

Cited by 4 publications

References 15 publications

Ultimate Resistance of Diagonally Stiffened Thin Steel Webs in I‐girders

Ultimate Resistance of Diagonally Stiffened Thin Steel Webs in I‐girders

Machine Learning-Based Prediction of Elastic Buckling Coefficients on Diagonally Stiffened Plate Subjected to Shear, Bending, and Compression

Buckling analysis of structural steel panel with multiple configuration of stiffeners

Contact Info

Product

Resources

About