Shear Strength of Plate Girders With Diagonally Stiffened Webs

Yonezawa, Hiroshi; Mikami, Ichizou; Dogaki, Masahiro; Uno, Hiroshige

doi:10.2208/jscej1969.1978.17

Cited by 11 publications

(5 citation statements)

References 5 publications

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“…The first type of stiffened plate model (called Type-1), which is simply supported diagonally, is shown in Figure 5a. Yonezawa [12] assumed that the stiffeners were rigid and could completely restrain the out-of-plane displacement of the diagonals. When the simply supported edges are used to simulate the rigid stiffeners, the results are called critical buckling coefficient k cr0 .…”

Section: Database 41 Fe Setting and Verificationmentioning

confidence: 99%

“…In addition, the relationship between flexure rigidity of stiffeners and critical buckling stress was analyzed for transversely and longitudinally stiffened plates, and the limit of the stiffness ratio was given, thus establishing the foundation for the research of buckling stability of stiffened plates. Mikami [11] and Yonezawa [12] investigated the buckling behavior of diagonally stiffened plates simply supported on four edges. 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.…”

Section: Introductionmentioning

confidence: 99%

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

Yang

2023

Sustainability

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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.

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Section: Database 41 Fe Setting and Verificationmentioning

confidence: 99%

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

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“…Yonezawa et al (1978) proposed an ultimate shear strength theory for plate girders with webs diagonally stiffened between vertical stiffeners. Fujii's formulas and Komatsu's also give good results, but they are more complicated.…”

Section: Shear Strength Of Plate Girdersmentioning

confidence: 99%

Plate Girders

2010

Guide to Stability Design Criteria for Metal Structures

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“…Jensen & Antoni and with two models based on the methodology proposed by Yonezawa [4], complemented with the works of Rockey & Škaloud [9] and Basler [10]. To the extent of the authors' knowledge, these are the works explicitly giving a methodology for the assessment of shear buckling of steel plated girders.…”

Section: Introductionmentioning

confidence: 99%

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

2022

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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.

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Shear Strength of Plate Girders With Diagonally Stiffened Webs

Cited by 11 publications

References 5 publications

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

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

Plate Girders

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

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