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Torsional-Flexural Buckling Of Thin-Walled Open Sections, Pen J. Fang, George Winter
Torsional-Flexural Buckling Of Thin-Walled Open Sections, Pen J. Fang, George Winter
CCFSS Library (1939 - present)
INTRODUCTION Compression members with thin-walled open sections, because of their low torsional rigidities and because their cross-sectional configuration is such that the centroid and the shear center often do not coincide, can buckle at loads well below the Euler load by interaction of torsion and bending. Fast expanding applications of such sections in civil and architectural engineering call for an extensive investigation of torsional-flexural buckling. Basic theory of torsional-flexural buckling is treated by a number of authors, I,2 and simplifications of the basic theory in the elastic range for the design purposes together with some test results were reported previously. …
The Performance Of Beams And Columns Continuously Braced With Diaphragms - I, Gordon P. Fisher, S. J. Errera
The Performance Of Beams And Columns Continuously Braced With Diaphragms - I, Gordon P. Fisher, S. J. Errera
CCFSS Library (1939 - present)
When properly attached, shear-rigid light-gage metal diaphragms, such as roof decking or wall sheathing, can be very effective as lateral bracing for slender columns and beams. At present, limited design use is made of this fact, because of inadequate information on the effectiveness and reliability of such bracing. In this thesis, previous theory on the stability of Isection beams and columns braced with shear-rigid diaphragms has been extended. Two energy methods are used, one employing the Euler-Lagrange conditions from the calculus of variations, and the other the Rayleigh-Ritz method. The problem initially considered is that of an I-section beam-column eccentrically …
Strength Of Three New Types Of Composite Beams, A. A. Toprac
Strength Of Three New Types Of Composite Beams, A. A. Toprac
CCFSS Library (1939 - present)
No abstract provided.
Structural Performance Of Light Gage Steel Diaphragms, Larry D. Luttrell, George Winter
Structural Performance Of Light Gage Steel Diaphragms, Larry D. Luttrell, George Winter
CCFSS Library (1939 - present)
Light gage steel roof, wall, and floor systems may be used to transfer in-plane shear forces from one part of a framed structure to another, leading to reduced loads in parts of the structure. This is particularly noticeable in buildings having rigid end walls and under lateral loading. The diaphragms transfer forces from the interior frames into the foundation through the rigid end walls, resulting in lower loads for the interior frames. The amount of force transfer is dependent upon the in-plane shear strength and is particularly sensitive to the shear stiffness of the diaphragm. The results from some 60 …
Torsional-Flexural Buckling Of Thin-Walled Open Sections, Pen J. Fang
Torsional-Flexural Buckling Of Thin-Walled Open Sections, Pen J. Fang
CCFSS Library (1939 - present)
No abstract provided.
Effects Of Cold-Forming On Light-Gage Steel Members, Kenneth W. Karren, George Winter
Effects Of Cold-Forming On Light-Gage Steel Members, Kenneth W. Karren, George Winter
CCFSS Library (1939 - present)
Cold-forming may cause significant increases in tensile and in compressive yield strength in both the corner and flat elements of light-gage cold-formed steel members. The cumulative effects may raise the yield strength to as reuch as 70% above the virgin yield strength of the as-rolled sheet steel. The yield strength of corners is always considerably higher than that of any other portion of a cold-formed member because of the large plastic deformations which take place in the corners. Thus compact members with a large ratio of corner area to cross sectional area will have the largest increases in yield strength. …