International Journal of Science, Technology and Society
Volume 2, Issue 4, July 2014, Pages: 69-72
Received: May 11, 2014;
Accepted: Jun. 11, 2014;
Published: Jun. 20, 2014
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Gancia Gian Michele, Dep. Architecture Sciences, Genoa Polytechnic School, Genoa, Italy
In X-type bracing structures generally it does not take into account the structural contribution of the compressed member, since it is assumed to have a negligible compressive strength; it considered that the stretched member takes the total stress. In the following we analyse as the stretched diagonal, joined in the middle to the compressed one, improves the structural behaviour of this both with respect to the buckling in-plane or out-of -plane of the structure. First we recall the link between the Euler buckling load of a rod free and braced depending on the stiffness k of the brace. Then we analyse the in-plane and out-of-plane buckling of the rod and, for the two situations, we value the increase of the buckling load due to the elastic brace. In the end for both cases we show in what condition the stretched rod causes that the compressed one buckles in the second mode.
Gancia Gian Michele,
About Buckling of X-Type Bracing, International Journal of Science, Technology and Society.
Vol. 2, No. 4,
2014, pp. 69-72.
Belluzzi O., “Contributo allo studio della stabilità dell’equilibrio di aste compresse”, Ann. dei Lav. Pub., 1929, 12.
G. Winter, “Lateral bracing of columns and beams”, ASCE Trans., 1960, 125.
S. Kitipornchai, D. Finch, “ Stiffness requirements for cross bracings”, J. of Str. Eng., ASCE, 1986, 112
A. Picard, D. Beaulieu, “ Design of diagonal cross bracing”, Eng. J., AISC, 1987, 24
T. Galambos, P. Green, T. Helwig, J. Yura, “ Basic design for stability”, AISC-SSRC Short Course, 2003
Z. Fan, T. Helwig,”Behaviour of steel box girders with top flange brac-ing”, J. of Str. Eng., ASCE, 1999, 125
AASHTO/NSBA Steel Bridge Collaboration, “G13.1 Guidelines for steel girder bridge analysis”, 2011 Washington, D.C.
J. Yura, Widian-to,”Lateral buckling and bracing of beams”, Proceedings of Structural Stability Research Council, Annual Stability Conference, 2005
T. Helwig, J. Yura,”Steel bridge design handbook: brac-ing system design”, Publication No.FHWA-IF-12-052 – vol. 13, 2012
NTC2008,“Norme Tecniche per le Costruzioni”, D.M.14.01.2008
IS 800-1993,”Code of Practice for General Construction in Steel”, Bureau of Indian Standard