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.

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.

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 Parameter Analysis of Corrugated Web Steel Beam under High Temperature

2012 ◽  
Vol 557-559 ◽  
pp. 116-119
Author(s):  
Bing Liu ◽  
Yu Lai Han ◽  
Zhen Qing Wang
Keyword(s):  
High Temperature ◽  
Local Buckling ◽  
Parameter Analysis ◽  
Steel Beam ◽  
Obvious Effect ◽  
Corrugated Web ◽  
Shear Buckling ◽  
Corrugated Steel Web ◽  
Steel Property ◽  
Overall Buckling

Three kinds of shear buckling parameters of corrugated steel web beam under high temperature of fire in different time are analyzed and the high temperature effect on structural steel property is taken into account, the expressions of local buckling parameter, overall buckling parameter and interactive buckling parameter are proposed and their variation trends with the high temperature change are analyzed, a recommendation is proposed in order to provide more accurate predictions for the load-carrying capability status of corrugated steel web beam under high temperature, the buckling parameters variation should be unbiased estimated above all. Numerical results show that high temperature has obvious effect on the buckling parameter changes of the corrugated web steel beam.

scholarly journals Minimum Weight Design of Sinusoidal Corrugated Web Beam Using Real-Coded Genetic Algorithms

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Sudeok Shon ◽  
Sangwook Jin ◽  
Seungjae Lee
Keyword(s):  
Genetic Algorithms ◽  
Optimum Design ◽  
Minimum Weight ◽  
Stable Solution ◽  
Genetic Operators ◽  
Minimum Weight Design ◽  
Corrugated Web ◽  
Shear Buckling ◽  
Weight Design ◽  
Real Coded Genetic Algorithms

Fundamental advantage of using corrugated web girder rather than plate girder reinforced with stiffeners is securing stability against shear buckling of web and unnecessary stiffeners despite the thinner web. Nonetheless, because shear buckling behavior of corrugated web is very complex, the design mechanism for beams and local, global, and interactive buckling problems should be considered in designing of its structural optimization for better economics and reasonableness. Therefore, this paper proposes a mathematical model for minimum weight design of sinusoidal web girder for securing better stability with smooth corrugation and aims at developing its optimum design program. The constraints for the optimum design were composed on the basis of the standards of EN 1993-1-5, DASt-R015, and DIN 18800, and the optimum program was coded in accordance with the standards based on Real-Coded Genetic Algorithms. The genetic operators for the developed program resulted in a stable solution with crossover probability between 12.5 and 50%, and the perturbation vector for outbreeding could obtain the best result with the model being applied of feasible design variable space of 20–30%. Additionally, the increase of yield strength resulted in decreased value of the objective function, and it was found through the change of the value of the constraint function that the thickness of web was an important factor in the optimum structural design.

Shear Resistance of Trapezoidal Corrugated Web in Local Buckling

2014 ◽  
Vol 554 ◽  
pp. 421-425 ◽  
Author(s):  
Fathoni Usman
Keyword(s):  
Finite Element Method ◽  
Slenderness Ratio ◽  
Local Buckling ◽  
Shear Resistance ◽  
Experimental Results ◽  
The Finite Element Method ◽  
Corrugated Web ◽  
Shear Buckling ◽  
Buckling Coefficient ◽  
Good Agreement

This paper presents analytical studies using Eigenvalue buckling analysis in the Finite Element Method to determine shear buckling and subsequently determine shear resistance of thin plated member with trapezoidal corrugated web. The result is compared with experimental results. It is found that the proposed equations give good agreement to the experimental results. However, the buckling coefficient k is still not generate a good shear stress based on its slenderness ratio hw/tw.

scholarly journals Shear Buckling of Plate Girders with Corrugated Web Restrained by End Stiffeners

2018 ◽  
Author(s):  
Witold Basiński
Keyword(s):  
Failure Modes ◽  
Numerical Models ◽  
Fem Analysis ◽  
Sine Wave ◽  
Experimental Investigations ◽  
Plate Girders ◽  
Buckling Resistance ◽  
Corrugated Web ◽  
Shear Buckling ◽  
Interactive Buckling

The study reports the investigations into the effect produced by flexural stiffness of end stiffeners on the design buckling resistance of the sine wave webs of girders. Experimental investigations were concerned with load displacement paths in sinusoidally corrugated web girders, composed of structural items and made to the full scale . The phenomena occurring in experimental investigations were represented using the Finite Element Method. In numerical models based on FEM analysis, the same failure modes of webs that were found in experimental investigations into corrugated web girders were accounted for. FEM numerical analysis was performed for girder models with webs 500, 1000, 1250 and 1500 mm in height, made of corrugated sheet metal 2, 2.5 and 3 mm in thickness. On the basis of laboratory tests and FEM analysis, a new method for estimating design shear buckling resistance for girders with semirigid and rigid end stiffeners was proposed. The method relies on the determination of interactive buckling resistance. The solution presented in this study was compared with formulas currently used for buckling resistance estimation. It was shown that the use of girder rigid end stiffeners produces in increase in shear buckling resistance up to 11%. Conclusions were drawn and recommendations were made with respect to the sizing of sine wave corrugated web girders with semirigid and rigid end stiffeners.

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