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.

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.

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.

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 BUCKLING OF THIN-WALLED CIRCULAR TUBES CONTAINING AN ELASTIC INFILL

2006 ◽  
Vol 06 (04) ◽  
pp. 457-474 ◽  
Author(s):  
M. A. BRADFORD ◽  
A. ROUFEGARINEJAD ◽  
Z. VRCELJ
Keyword(s):  
Axial Compression ◽  
A Priori ◽  
Local Buckling ◽  
Steel Tube ◽  
Transcendental Equation ◽  
Buckling Mode ◽  
Buckling Stress ◽  
Elastic Tubes ◽  
Thin Walled ◽  
Energy Formulation

Circular thin-walled elastic tubes under concentric axial loading usually fail by shell buckling, and in practical design procedures the buckling load can be determined by modifying the local buckling stress to account empirically for the imperfection sensitive response that is typical in Donnell shell theory. While the local buckling stress of a hollow thin-walled tube under concentric axial compression has a solution in closed form, that of a thin-walled circular tube with an elastic infill, which restrains the local buckling mode, has received far less attention. This paper addresses the local buckling of a tubular member subjected to axial compression, and formulates an energy-based technique for determining the local buckling stress as a function of the stiffness of the elastic infill by recourse to a transcendental equation. This simple energy formulation, with one degree of buckling freedom, shows that the elastic local buckling stress increases from 1 to [Formula: see text] times that of a hollow tube as the stiffness of the elastic infill increases from zero to infinity; the latter case being typical of that of a concrete-filled steel tube. The energy formulation is then recast into a multi-degree of freedom matrix stiffness format, in which the function for the buckling mode is a Fourier representation satisfying, a priori, the necessary kinematic condition that the buckling deformation vanishes at the point where it enters the elastic medium. The solution is shown to converge rapidly, and demonstrates that the simple transcendental formulation provides a sufficiently accurate representation of the buckling problem.

Experimental Study on the Drying Performance of the High Temperature Heat Pump Dryer

2012 ◽  
Vol 550-553 ◽  
pp. 3219-3223
Author(s):  
Xing Wang Zhu ◽  
Chun Xia Hu ◽  
Zhi Min Guo ◽  
Yu Gui Su
Keyword(s):  
High Temperature ◽  
Heat Pump ◽  
External Environment ◽  
Stable Operation ◽  
Obvious Effect ◽  
Electromagnetic Valve ◽  
Exhaust Temperature ◽  
Temperature Heat ◽  
High Temperature Heat Pump

In this paper，a high temperature heat-pump dryer and a corresponding semi-enclosed test drying room for using the dryer are built up respectively. While the average dry bulb of the external environment is 25°C and the relative humidity is 55%, the performance of the dryer is obtained when the dryer is running continuously for five hours. The results show that: the electromagnetic valve-capillary institution has an obvious effect on the lower the dryer exhaust temperature. It makes the suction temperature of compressor dropped 10 °C~15 °C, which can reduce the exhaust temperature and prevent compressor’s overheating. When the exhaust temperature keep at 100~110 °C, it can not only guarantee the temperature of wind coming from the dryer is high, but also can make sure the drying system’s long-term stable operation.

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.

Inelastic Shear Buckling Strength of Low-Yield-Point Steel Shear Wall

2014 ◽  
Vol 501-504 ◽  
pp. 2509-2514
Author(s):  
Jian Hua Shao ◽  
Wen He
Keyword(s):  
Yield Point ◽  
Pure Shear ◽  
Shear Wall ◽  
Unified Theory ◽  
Buckling Strength ◽  
Buckling Stress ◽  
Steel Shear Wall ◽  
Shear Buckling ◽  
Inelastic Shear ◽  
The Relationship

The mechanical properties of low-yield-point (LYP) steel and its advantages as seismic steel are introduced in this paper. The theoretical equations of inelastic shear buckling stress at the pure shear action for the LYP steel are derived from unified theory of plastic buckling. The relationship curve of inelastic shear buckling strength and width-thickness ratio of LYP steel shear wall at the different height-width ratios of plate is given through iteration calculation process. The effectiveness of theoretical equations used for calculating the buckling stress is verified by experimental results.

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