An analytical expression to determine “realistic” shear buckling stress in cold-formed lipped channels

2015 ◽  
Vol 8 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Osama Bedair
Keyword(s):  
Analytical Expression ◽  
Buckling Stress ◽  
Shear Buckling

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.

Shear Buckling of Clamped and Simply-Supported Infinitely Long Plates Reinforced by Transverse Stiffeners and a Central Longitudinal Stiffener

1962 ◽  
Vol 13 (2) ◽  
pp. 95-114 ◽  
Author(s):  
K. C. Rockey ◽  
I. T. Cook
Keyword(s):  
Shear Stress ◽  
Flexural Rigidity ◽  
Numerical Results ◽  
Simply Supported ◽  
Longitudinal Stiffener ◽  
Buckling Stress ◽  
Longitudinal Stiffeners ◽  
Edge Conditions ◽  
Shear Buckling ◽  
Clamped Edge

SummaryThe paper presents a solution to the buckling under shear stress of infinitely long plates which are reinforced by both transverse stiffeners and longitudinal stiffeners. Each family of stiffeners is assumed to consist of equally spaced stiffeners. Both simply-supported and clamped edge conditions are examined. Numerical results are obtained for the case of a plate with transverse stiffeners and a central longitudinal stiffener and relationships between the buckling stress and the flexural rigidity parameters of the stiffeners are provided for three different spacings of the transverse stiffeners.

scholarly journals Shear Strength of Trapezoidal Corrugated Steel Webs for Horizontally Curved Girder Bridges

2019 ◽  
Vol 9 (9) ◽  
pp. 1942 ◽  
Author(s):  
Sumei Liu ◽  
Hanshan Ding ◽  
Luc Taerwe ◽  
Wouter De Corte
Keyword(s):  
Analytical Formula ◽  
Curvature Radius ◽  
Horizontally Curved ◽  
Girder Bridges ◽  
Buckling Stress ◽  
Simple Support ◽  
Shear Buckling ◽  
The Difference ◽  
Curved Girders ◽  
The Galerkin Method

Curved composite girder bridges with corrugated steel webs (CSWs) have already been constructed around the world. However, limited work has been done on their shear behavior. In this paper, the corrugated steel web (CSW) in horizontally curved girders (HCGs) is treated as an orthotropic cylindrical shallow shell, and the analytical formula for the elastic global shear buckling stress is deduced by the Galerkin method. Calculation tables for the global shear buckling coefficient for a four-edge simple support, for a four-edge fixed support, and for the two edges constrained by flanges fixed and the other two edges simply supported are given. Then, a parametric study based on a linear buckling analysis is performed to analyze the effect of the curvature radius and girder span on the shear buckling stress. Analytical and numerical results show that the difference of shear buckling stress of CSWs between curved girders and straight girders is small, so the shear design formulas for straight girders can be applied for curved girders. Finally, a series of tests were performed on three curved box girders with CSWs. Similar to CSWs in straight girders, the shear strain distributions of CSWs in HCGs are almost uniform along the direction of the web height and the principal strain direction angles are close to 45°. For the three specimens, CSWs carry about 76% of the shear force. In the destructive test, shear buckling after yielding occurred in all specimens which is in good agreement with the theoretical prediction, which means that the analytical formulas provide good predictions for the shear buckling stress of CSWs in HCGs and can be recommended for design purposes.

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.

On the influence of specimen thickness in TEM images of super-conducting vortices

1996 ◽  
Vol 54 ◽  
pp. 724-725
Author(s):  
J. Bonevich ◽  
D. Capacci ◽  
G. Pozzi ◽  
K. Harada ◽  
H. Kasai ◽  
...  
Keyword(s):  
Flux Line ◽  
Analytical Form ◽  
Realistic Model ◽  
Electron Holography ◽  
Specimen Thickness ◽  
Flux Tubes ◽  
Analytical Expression ◽  
Flux Lines ◽  
Normal Core ◽  
Two Parameters

The successful observation of superconducting flux lines (fluxons) in thin specimens both in conventional and high Tc superconductors by means of Lorentz and electron holography methods has presented several problems concerning the interpretation of the experimental results. The first approach has been to model the fluxon as a bundle of flux tubes perpendicular to the specimen surface (for which the electron optical phase shift has been found in analytical form) with a magnetic flux distribution given by the London model, which corresponds to a flux line having an infinitely small normal core. In addition to being described by an analytical expression, this model has the advantage that a single parameter, the London penetration depth, completely characterizes the superconducting fluxon. The obtained results have shown that the most relevant features of the experimental data are well interpreted by this model. However, Clem has proposed another more realistic model for the fluxon core that removes the unphysical limitation of the infinitely small normal core and has the advantage of being described by an analytical expression depending on two parameters (the coherence length and the London depth).

Contrast From Point Defects in The Infinitesimal Approximation

1980 ◽  
Vol 38 ◽  
pp. 350-351
Author(s):  
L. J. Sykes ◽  
J. J. Hren
Keyword(s):  
Electron Microscope ◽  
Point Defects ◽  
Broad Class ◽  
Stacking Fault ◽  
Crystalline Solids ◽  
Dislocation Loops ◽  
Analytical Expression ◽  
Stacking Fault Tetrahedra

In electron microscope studies of crystalline solids there is a broad class of very small objects which are imaged primarily by strain contrast. Typical examples include: dislocation loops, precipitates, stacking fault tetrahedra and voids. Such objects are very difficult to identify and measure because of the sensitivity of their image to a host of variables and a similarity in their images. A number of attempts have been made to publish contrast rules to help the microscopist sort out certain subclasses of such defects. For example, Ashby and Brown (1963) described semi-quantitative rules to understand small precipitates. Eyre et al. (1979) published a catalog of images for BCC dislocation loops. Katerbau (1976) described an analytical expression to help understand contrast from small defects. There are other publications as well.

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