The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Donald W. White - One of the best experts on this subject based on the ideXlab platform.
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Improved Noncompact Web-Slenderness Limit for Steel I-Girders
Journal of Structural Engineering, 2017Co-Authors: Lakshmi Subramanian, Donald W. WhiteAbstract:AbstractThe noncompact web-slenderness limit in current design specifications is based on an assumed value of the plate Buckling Coefficient for a web subjected to flexure that is between the value...
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improved noncompact web slenderness limit for steel i girders
Journal of Structural Engineering-asce, 2016Co-Authors: Lakshmi Subramanian, Donald W. WhiteAbstract:AbstractThe noncompact web-slenderness limit in current design specifications is based on an assumed value of the plate Buckling Coefficient for a web subjected to flexure that is between the values for fixed and simply-supported edge conditions. While the limit provided in current specifications is a good representation in many situations, there is evidence that the limit overestimates the magnitude of the restraint provided by smaller flanges. This paper shows that the ratio of the area of the compression flange to the area of the web in compression is a good indicator of the restraint provided to the bend-Buckling of the web plate. The overestimation of the plate Buckling Coefficient can result in the classification of cross sections having relatively small flanges as noncompact web sections when their behavior is more akin to that of slender web sections. Slender web sections have a maximum possible flexural resistance, referred to as the plateau strength, less than the yield moment Myc, because of lo...
Carlos Graciano - One of the best experts on this subject based on the ideXlab platform.
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Elastic Buckling analysis of plate girders stiffened with triangular cell flanges under patch loading
Structures, 2021Co-Authors: Carlos Graciano, Miguel González-góez, David OrozcoAbstract:Abstract This paper aims at developing an analytical expression for the Buckling Coefficient of steel plate girders stiffened with triangular cell flanges subjected to patch loading. In this study, Buckling Coefficients are computed numerically through linear Buckling analysis (LBA) using the finite element method. Firstly, a numerical model for longitudinally stiffened girders subjected to patch loading is verified by computing Buckling Coefficients and comparing the results with those reported in the literature. Afterward, a numerical model is developed for plate girders stiffened with a triangular cell flange. Thereafter, an extensive parametric study is conducted to investigate the influence of various geometric parameters such as the relative position of the triangular cell with respect to the web, the ratio between the thicknesses of the plates forming the cell and the web, the relative position of the cell in the flange, and the web panel aspect ratio. The influence of these parameters is analyzed in detail. Finally, an analytical expression for the Buckling Coefficient is fitted through regression analysis of the results. This expression can be used in the design of steel bridge girders stiffened with triangular cell flanges.
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Elastic Buckling of longitudinally stiffened patch loaded plate girders using factorial design
Journal of Constructional Steel Research, 2014Co-Authors: Carlos Graciano, J. MendesAbstract:Abstract This paper is aimed at investigating the elastic Buckling of longitudinally stiffened plate girder subjected to patch loading. At first, Buckling Coefficients are computed by means of linear Buckling analysis using the finite element method. Thereafter, a first order factorial design is performed to weigh the geometrical parameters on the Buckling Coefficient. Finally, a second order model is obtained to predict the Buckling Coefficient for longitudinally stiffened plate girders. A significant improvement, within the range of geometric parameters investigated herein, is achieved when compared to similar formulae found in the literature.
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Resistance of longitudinally stiffened I-girders subjected to concentrated loads
Journal of Constructional Steel Research, 2003Co-Authors: Carlos Graciano, Bernt JohanssonAbstract:Abstract This paper presents a design procedure for the determination of the ultimate resistance of longitudinally stiffened girder webs to concentrated loads. The influence from the longitudinal stiffener is considered in the slenderness parameter λ , through the Buckling Coefficient k f . This procedure is harmonized with other design procedures currently used for describing Buckling problems in steel structures. An expression is developed for the Buckling Coefficient based on finite element analysis. The interaction between the web plate with flanges and a longitudinal stiffener was considered in the analysis. The ultimate strength according to the design procedure presented herein and the results are compared with available experimental results. The interaction with bending is also investigated.
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Critical Buckling of longitudinally stiffened webs subjected to compressive edge loads
Journal of Constructional Steel Research, 2003Co-Authors: Carlos Graciano, Ove LagerqvistAbstract:The resistance of steel plate girders subjected to concentrated load can be described using a strength curve, which includes a gradual transition from yielding to Buckling depending on the slenderness ratio of the web. The slenderness is a function of the ratio of the yield resistance to the critical Buckling load. This paper describes a methodology for the determination of Buckling Coefficients for longitudinally stiffened plate girders subjected to partial edge loading or concentrated loads. After an extensive parametric analysis, the optimum parameters that govern the change from a global Buckling mode to a more local Buckling mode were found. As in similar Buckling problems, the results show that the location and the relative flexural/torsional rigidity of the stiffener are relevant parameters that govern the final Buckling shape. Finally an expression for the Buckling Coefficient used to determine the critical Buckling load for longitudinally stiffened girder webs is presented.
David Orozco - One of the best experts on this subject based on the ideXlab platform.
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Elastic Buckling analysis of plate girders stiffened with triangular cell flanges under patch loading
Structures, 2021Co-Authors: Carlos Graciano, Miguel González-góez, David OrozcoAbstract:Abstract This paper aims at developing an analytical expression for the Buckling Coefficient of steel plate girders stiffened with triangular cell flanges subjected to patch loading. In this study, Buckling Coefficients are computed numerically through linear Buckling analysis (LBA) using the finite element method. Firstly, a numerical model for longitudinally stiffened girders subjected to patch loading is verified by computing Buckling Coefficients and comparing the results with those reported in the literature. Afterward, a numerical model is developed for plate girders stiffened with a triangular cell flange. Thereafter, an extensive parametric study is conducted to investigate the influence of various geometric parameters such as the relative position of the triangular cell with respect to the web, the ratio between the thicknesses of the plates forming the cell and the web, the relative position of the cell in the flange, and the web panel aspect ratio. The influence of these parameters is analyzed in detail. Finally, an analytical expression for the Buckling Coefficient is fitted through regression analysis of the results. This expression can be used in the design of steel bridge girders stiffened with triangular cell flanges.
Lakshmi Subramanian - One of the best experts on this subject based on the ideXlab platform.
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Improved Noncompact Web-Slenderness Limit for Steel I-Girders
Journal of Structural Engineering, 2017Co-Authors: Lakshmi Subramanian, Donald W. WhiteAbstract:AbstractThe noncompact web-slenderness limit in current design specifications is based on an assumed value of the plate Buckling Coefficient for a web subjected to flexure that is between the value...
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improved noncompact web slenderness limit for steel i girders
Journal of Structural Engineering-asce, 2016Co-Authors: Lakshmi Subramanian, Donald W. WhiteAbstract:AbstractThe noncompact web-slenderness limit in current design specifications is based on an assumed value of the plate Buckling Coefficient for a web subjected to flexure that is between the values for fixed and simply-supported edge conditions. While the limit provided in current specifications is a good representation in many situations, there is evidence that the limit overestimates the magnitude of the restraint provided by smaller flanges. This paper shows that the ratio of the area of the compression flange to the area of the web in compression is a good indicator of the restraint provided to the bend-Buckling of the web plate. The overestimation of the plate Buckling Coefficient can result in the classification of cross sections having relatively small flanges as noncompact web sections when their behavior is more akin to that of slender web sections. Slender web sections have a maximum possible flexural resistance, referred to as the plateau strength, less than the yield moment Myc, because of lo...
Julie E. Mills - One of the best experts on this subject based on the ideXlab platform.
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Buckling Analysis of Laminated Composite Plate on Tensionless Elastic Foundations Under Uniaxial Compression
International Journal of Structural Stability and Dynamics, 2018Co-Authors: Jianghui Dong, Xing Ma, Yan Zhuge, Julie E. MillsAbstract:This paper addresses the compressive local Buckling behavior of an infinitely long laminated composite plate resting on a tensionless elastic foundation (Winkler foundation). The analytical solution to the contact Buckling Coefficient of a laminated composite plate is derived using a one-dimensional analytical method. Numerical examples are considered to investigate the influence of the ply angle and foundation stiffness on the contact Buckling Coefficients of laminated composite plates under uniaxial compression. The lateral boundary conditions including clamped and simply-supported edges are treated. Finally, finite element (FE) analysis is conducted to provide an independent check on the analytical solutions.
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Local Buckling of thin plate on tensionless elastic foundations under interactive uniaxial compression and shear
Elsevier, 2018Co-Authors: Jianghui Dong, Yan Zhuge, Julie E. MillsAbstract:ABSTRACT: This paper uses a mathematical method to develop an analytical solution to the local Buckling behaviour of long rectangular plates resting on tensionless elastic Winkler foundations and under combined uniform longitudinal uniaxial compressive and uniform in-plane shear loads. Fitted formulas are derived for plates with clamped edges and simplified supported edges. Two examples are given to demonstrate the application of the current method: one is a plate on tensionless spring foundations and the other is the contact between the steel sheet and elastic solid foundation. Finite element (FE) analysis is also conducted to validate the analytical results. Good agreement is obtained between the current method and FE analysis. Keywords: Buckling Coefficient, Contact Buckling, Winkler foundation, Interaction curve, Finite element analysi
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Shear Buckling analysis of laminated plates on tensionless elastic foundations
Steel and Composite Structures, 2017Co-Authors: Jianghui Dong, Yan Zhuge, Julie E. MillsAbstract:The current study addresses the local Buckling analysis of an infinite thin rectangular symmetrically laminated composite plate restrained by a tensionless Winkler foundation and subjected to uniform in-plane shear loading. An analytic method (i.e., one-dimensional mathematical method) is used to achieve the analytical solution estimate of the contact Buckling Coefficient. In addition, to study the effect of ply angle and foundation stiffness on the critical Buckling Coefficients for the laminated composite plates, the parametric studies are implemented. Moreover, the convergence for finite element (FE) mesh is analysed, and then the examples in the parametric study are validated by the FE analysis. The results show that the FE analysis has a good agreement with the analytical solutions. Finally, an example with the analytical solution and FE analysis is presented to demonstrate the availability and feasibility of the presented analytical method.
