A Generalized Formula for Elastic Shear Buckling of Trapezoidal Corrugated Web Girder

2020 ◽  
Vol 24 (10) ◽  
pp. 2961-2970
Author(s):  
Hong-Guang Luo ◽  
Li-Ying Peng ◽  
Chan-Tao Zhang ◽  
Cheng-Xiu Cai
Keyword(s):  
Corrugated Web ◽  
Shear Buckling ◽  
Elastic Shear

Elastic Shear Bucking Analysis of Corrugated Web Steel Beam in the Fire

2011 ◽  
Vol 255-260 ◽  
pp. 534-538
Author(s):  
Shu Hua Chen ◽  
Yu Lai Han ◽  
Jian Hua Zhang
Keyword(s):  
High Temperature ◽  
Critical Stress ◽  
Steel Beam ◽  
Buckling Mode ◽  
Obvious Effect ◽  
Buckling Stress ◽  
Stress Changes ◽  
Corrugated Web ◽  
Shear Buckling ◽  
Elastic Shear

According to the temperature changes of corrugated webs steel beam in fire at different time, 3 different kinds of shear buckling modes and the changes of elastic buckling critical stress of corrugated web steel beam are analyzed in the fire, considering the effect of fire high temperature on structure elasticity modulus. The computed expressions of partial shear elastic critical buckling stress, elastic critical buckling stress of general buckling mode and critical stress of elastic relevant buckling in the fire are presented in the paper. Numerical results show that fire high temperature has obvious effect on elastic shear critical buckling stress changes of corrugated web steel beam.

Tragverhalten von Wellstegträgern mit kreisförmigen Öffnungskranz/Shear buckling of corrugated web beams with circular opening wall

Bauingenieur ◽  
2021 ◽  
Vol 96 (04) ◽  
pp. 114-120
Author(s):  
Zheng Li ◽  
Jörgen Robra
Keyword(s):  
Sich Eine ◽  
Circular Opening ◽  
Finite Elemente ◽  
Corrugated Web ◽  
Shear Buckling

Der Wellstegträger ist ein relativ neuartiges Bauteil mit einem breiten Anwendungsbereich im Stahlbau. Aufgrund des dünnen Stegs des Trägers ergibt sich eine signifikante Gewichtsreduzierung im Vergleich zu gewalzten oder geschweißten I-Profilen. Der Wellstegträger kann mit dünnerem Steg eine größere Steifigkeit aus der Ebene erzie- len, so dass das Beulen des Stegs durch die Wellung verhindert wird. Um eine Erhöhung der Gebäudehöhe zu vermeiden, können Öffnungen für Rohrleitungen in gewellten Stahlträgern eine kostengünstige Lösung darstellen. Dennoch reduzieren die Öffnungen im Wellsteg die Gesamtsteifigkeit und Tragfähigkeit des Trägers. Um das mechanische Verhalten von Wellstegträgern mit kreisförmigen Öffnungen und entsprechendem Öffnungskranz zu untersuchen, wurden drei Versuchskörper durch Bauteilversuche getestet. Die Finite-Elemente-Analyse wurde mit Abaqus durchgeführt. Die Simulationsergebnisse unter Berücksichtigung der geometrischen Imperfektion stimmen gut mit den Experimenten überein. Die Ergebnisse zeigen, dass der Öffnungskranz die Tragfähigkeit des Wellstegträgers mit Öffnungen wirksam verbessern kann. Anhand der Parameterstudie erhöht die Zunahme der Kranzdicke die Empfindlichkeit der geometrischen Imperfektion. Außerdem kann die Tragfähigkeit des Wellstegträgers mit kreisförmigen Öffnungskranz mit einem einfachen Rechenmodell für die Handrechnung auf der sicheren Seite liegend abgeschätzt werden.

Shear Resistance Study of Hybrid I-Beams Fabricated by HPS 485W and Q345 Steels

2011 ◽  
Vol 255-260 ◽  
pp. 1311-1314
Author(s):  
Lan Duan ◽  
Li Zheng ◽  
Chun Sheng Wang ◽  
Jing Yu Hu
Keyword(s):  
Shear Stress ◽  
High Performance ◽  
Shear Failure ◽  
Ultimate Load ◽  
Shear Resistance ◽  
Conventional Steel ◽  
Buckling Resistance ◽  
Shear Buckling ◽  
Post Buckling ◽  
Elastic Shear

This paper evaluates the shear resistance of hybrid I-beams fabricated by high performance steel and conventional steel. A number of hybrid I-beams are modeled and analyzed to determine their shear failure mechanism characteristics, considering parameters of web slenderness (hw/tw), frame action from end-stiffeners, ratio of flange width to web depth (bf/hw) and panel numbers. The analyses conclude that, in shear resistance calculation, plate beam with inter and slender webs often fail in inelastic or elastic shear buckling while ultimate shear resistance of compact webs is given by the shear strength of the material. What’s more, more rigid stiffeners provide more fixity to flange plates and increase the post-buckling resistance of plate beam. For plate beam with several panels, the shear stress at the ultimate load is similar. Finally, the I-beams with larger flange width to web depth ratio would develop larger shear strengths and then shear deformation cause formation of plastic hinges.

scholarly journals Study on Elastic Global Shear Buckling of Curved Girders with Corrugated Steel Webs: Theoretical Analysis and FE Modelling

2018 ◽  
Vol 8 (12) ◽  
pp. 2457 ◽  
Author(s):  
Kangjian Wang ◽  
Man Zhou ◽  
Mostafa Hassanein ◽  
Jitao Zhong ◽  
Hanshan Ding ◽  
...  
Keyword(s):  
Parametric Analysis ◽  
Trigonometric Function ◽  
Theoretical Formula ◽  
Radius Of Curvature ◽  
Buckling Strength ◽  
Shear Buckling ◽  
Curved Girders ◽  
Corrugated Steel Web ◽  
Orthotropic Shells ◽  
Elastic Shear

Despite the construction of several curved prestressed concrete girder bridges with corrugated steel webs (CSWs) around the world; their shear behavior has seldom been investigated. Accordingly, this paper substitutes the lack of available information on the global elastic shear buckling of a plane curved corrugated steel web (PCCSW) in a curved girder. This is based on the equilibrium equations and geometric equations in the elastic theory of classical shells, combined with the constitutive relation of orthotropic shells. Currently, the global elastic shear buckling process of the PCCSW in a curved girder is studied, for the first time in literature, with an equivalent orthotropic open circular cylindrical shell (OOCCS) model. The governing differential equation of global elastic shear buckling of the PCCSW, as well as its buckling strength, is derived by considering the orthotropic characteristics of a corrugated steel web, the rational trigonometric displacement modes, Galerkin’s method and variational principles. Additionally, the accuracy of the proposed theoretical formula is verified by comparison with finite element (FE) results. Moreover, the expressions of the inner or outer folded angle and radius of curvature are given by the cosine theorem of the trigonometric function and inverse trigonometric function. Subsequently, parametric analysis of the shear buckling behavior of the PCCSW is carried out by considering the cases where the radius of curvature is constant or variable. This parametric analysis highlights the effects of web dimensions, height-to-thickness ratio, aspect ratios of longitudinal and inclined panels, corrugation height, curvature radius and folded angles on the elastic shear buckling strength. As a result, this study provides a theoretical reference for the design and application of composite curved girders with CSWs.

Interactive shear resistance of corrugated web in steel beam exposed to fire

2016 ◽  
Vol 7 (1) ◽  
pp. 69-78
Author(s):  
Mariusz Marcin Maslak ◽  
Marcin Lukacz
Keyword(s):  
Failure Modes ◽  
Steel Beams ◽  
Steel Beam ◽  
Safety Level ◽  
Design Algorithm ◽  
Content Type ◽  
Corrugated Webs ◽  
Buckling Resistance ◽  
Corrugated Web ◽  
Shear Buckling

Purpose The purpose of this paper is to present and discuss in detail the design approach to shear buckling resistance evaluation for corrugated web being a part of a steel beam exposed to fire. Design/methodology/approach It is based on the interaction between the local and global elastic instability failure modes as well as on the possible yielding of the whole web cross-section during fire. Findings New formulae, adequate for specification of the suitable shear buckling coefficients, depend not only on the web slenderness but also on the temperature of structural steel. Originality/value The methodology proposed by the authors can be added to the current European standard recommendations given in EN 1993-1-2 as a well-justified design algorithm helpful in reliable evaluation of a safety level for steel beams with slender corrugated webs subject to fire exposure. It seems to be highly desirable because, at present, there are no detailed instructions in this field.

scholarly journals Design of Transverse Stiffeners in Plate Girders with Corrugated Web

2019 ◽  
Author(s):  
Witold Basiński
Keyword(s):  
Numerical Models ◽  
Experimental Investigations ◽  
Absolute Minimum ◽  
Plate Girders ◽  
Corrugated Web ◽  
Intermediate Stiffener ◽  
Shear Buckling ◽  
Geometry Parameter ◽  
The Web ◽  
Stiffness Criterion

This study reports investigations into the effect of relative flexural stiffness of intermediate stiffeners γ on the failure zone location in the corrugated web. The study also aimed at obtaining stiffness criterion for intermediate stiffeners that depends on the magnitude of the plate geometry parameter α. To achieve the goals of the study, experimental investigations were conducted into load displacement paths of four exemplary SIN girders. They were simply supported girders, made to full scale, and composed of pre-assembled units. The phenomena occurring in the experiment were represented using the Finite Element Method. For FEM numerical analysis of girders with intermediate stiffeners, models with the web height of 1000, 1250 and 1500 mm, made from 2; 2.5 and 3 mm thick corrugated sheet metal were used. Due to the analysis of 52 girder numerical models, it was possible to propose the stiffness criterion of intermediate stiffeners. The criterion was based on the assessment of shear buckling strength of the corrugated web. Using the regression method, dimensionless coefficients of the stiffener stiffness ks dependent on the optimum stiffness γ were determined. Based on estimated coefficients of the stiffener stiffness ks, the absolute minimum stiffness of intermediate stiffeners Ismin used in corrugated web plate girders was calculated. It was demonstrated that the use of an intermediate stiffener, the stiffness of which is greater than Ismin , additionally leads to a change in the location of the site of the web shear buckling.

Sign in / Sign up

Export Citation Format

Share Document