Elastic local buckling of composite tee-beams with longitudinal stiffeners

1993 ◽  
Vol 20 (6) ◽  
pp. 923-930 ◽  
Author(s):  
M. Azhari ◽  
M. A. Bradford
Keyword(s):  
Local Buckling ◽  
Neutral Axis ◽  
Longitudinal Stiffener ◽  
Finite Strip ◽  
Finite Strip Method ◽  
Buckling Stress ◽  
Optimum Position ◽  
Longitudinal Stiffeners ◽  
Negative Moment ◽  
Interaction Curves

The semi-analytical complex finite strip method is used to study the elastic local buckling of composite tee-section beams in negative moment and shear which contain a longitudinal stiffener attached to the web. The optimum position of this stiffener for different positions of the neutral axis is calculated in order to maximize the local buckling stress. Design graphs for longitudinal stiffeners are presented. Interaction curves between shear and bending for different positions of the neutral axis in a stiffened girder are given. Key words: composite beams, elasticity, finite strips, local buckling, longitudinal stiffeners, webs.

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 AN INVESTIGATION ON THE POST-LOCAL-BUCKLING ANALYSIS OF I-SECTION STRUTS USING FINITE STRIP METHOD

2010 ◽  
pp. 662-677
Author(s):  
H.R. Ovesy ◽  
◽  
J. Loughlan ◽  
S.A.M. Ghannadpour ◽  
◽  
...  
Keyword(s):  
Local Buckling ◽  
Buckling Analysis ◽  
Finite Strip ◽  
Strip Method ◽  
Finite Strip Method

scholarly journals Local buckling of thin-walled circular hollow section under uniform bending

2021 ◽  
Vol 15 (4) ◽  
pp. 88-98
Author(s):  
Bui Hung Cuong
Keyword(s):  
Critical Stress ◽  
Local Buckling ◽  
Critical Length ◽  
Hollow Section ◽  
Finite Strip ◽  
Finite Strip Method ◽  
Half Wave ◽  
Parametric Studies ◽  
Thin Walled ◽  
Circular Hollow Section

This article presents a semi-analytical finite strip method based on Marguerre’s shallow shell theory and Kirchhoff’s assumption. The formulated finite strip is used to study the buckling behavior of thin-walled circular hollow sections (CHS) subjected to uniform bending. The shallow finite strip program of the present study is compared to the plate strip implemented in CUFSM4.05 program for demonstrating the accuracy and better convergence of the former. By varying the length of the CHS, the signature curve relating buckling stresses to half-wave lengths is established. The minimum local buckling point with critical stress and corresponding critical length can be found from the curve. Parametric studies are performed to propose approximative expressions for calculating the local critical stress and local critical length of steel and aluminum CHS.

Lay-Up Effects on the Dynamic Instability of Moderately Thick Stiffened Curved Panels

2012 ◽  
Vol 152-154 ◽  
pp. 1477-1482
Author(s):  
Hamid Reza Ovesy ◽  
Jamshid Fazilati
Keyword(s):  
Cylindrical Shell ◽  
Shear Deformation ◽  
Dynamic Instability ◽  
Third Order ◽  
Longitudinal Stiffener ◽  
Finite Strip ◽  
The Third ◽  
Strip Method ◽  
Finite Strip Method ◽  
Curved Panels

The dynamic instability of cylindrical shell panels having longitudinal stiffener is studied by using the developed finite strip method (FSM). The method is formulated using the third order shear deformation shell's theory of Reddy's form and the Koiter-Sanders theory for cylindrical shells is implemented. The lay-up effects of skin as well as the stiffener are investigated.

Buckling of longitudinally stiffened plates in bending and compression

1989 ◽  
Vol 16 (5) ◽  
pp. 607-614 ◽  
Author(s):  
Mark A. Bradford
Keyword(s):  
Limit State ◽  
Local Buckling ◽  
Test Results ◽  
Pure Bending ◽  
Uniform Compression ◽  
Longitudinal Stiffener ◽  
Optimum Position ◽  
Buckling Coefficient ◽  
The Relationship ◽  
Web Plates

The nonlinear stiffness equations that predict local and post-local buckling of plates and plate assemblies are given. These equations are validated by accurate predictions of independent test results. The elastic local buckling of longitudinally stiffened web plates in combined bending and compression is considered. Graphs which may be used to predict the optimum position of a stiffener are presented. The relationship between the area and second moment of area of a stiffener of finite dimensions that optimizes the local buckling coefficient is given for various eccentricities of end load. The post-local buckling of a longitudinally stiffened plate in uniform compression and pure bending is also considered. It is shown that the provision of a longitudinal stiffener, of proportions to enforce a node at the plate–stiffener junction, enhances significantly the postbuckling response of the plate with regard to the serviceability limit state, particularly for the case of pure bending. Key words: bending, compression, finite strips, local buckling, plates, postbuckling, stiffeners, webs.

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