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Advances in steel structures: proceeding of International by S L Chan; J G Teng; Hong Kong Polytechnic University

By S L Chan; J G Teng; Hong Kong Polytechnic University

Those volumes of court cases comprise eleven invited keynote papers and 172 contributed papers awarded on the overseas convention on Advances in metal constructions hung on 11-14 December 1996 in Hong Kong. The papers conceal a large spectrum of issues and feature been contributed from over 20 international locations all over the world. The convention, the 1st ever of its type in Hong Kong, supplied a discussion board for dialogue and Read more...

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Extra info for Advances in steel structures: proceeding of International Conference on Advances in Steel Structures, 11-14 December 1996, Hong Kong

Sample text

1989). 0 for beams in bending about the strong axis made of rolled section. 01 for Chapter 5 of Eurocode 3. RWTH, Aachen. FULL SCALE TESTING OF TRANSMISSION AND TELECOMMUNICATION TOWERS USING NUMERICAL SIMULATION TECHNIQUES S. A. AI-Bermani Department of Civil Engineering, The University of Queensland Brisbane, QLD 4072 Australia ABSTRACT A compact and practical nonlinear analytical method for simulating the global structural response of transmission and telecommunication towers is described. The tower is modelled as an assembly of beamcolumn elements.

S. A. 2 Heavy Suspension Tower (275 kV Double CircuiO A full-scale heavy suspension tower (Fig. lb) was tested under six different loading conditions (EPT 1988). The tower has passed successfully the first five tests. During the sixth test (Fig. 5) which was an intact condition under maximum wind, the tower collapsed at 90% of the design ultimate load. The failure (see Fig. 6) was described in the test report as "an unusual failure which involved a general collapse of the compressed face of the tower".

Load-deflection paths describing the tower responses together with the tower deflected shape have been presented. The proposed nonlinear analytical technique predicted not only the ultimate load but also the failure mode of the tower which resembled very closely the failure mode during tests. From the analytical results obtained, it was noted that the material nonlinearity has assumed a more dominant role than the geometric nonlinearity in determining tower responses. Studying the tower member forces at failure under different loading conditions also revealed that forces in the redundants or the nominal bracing members are, in general, higher than the assumed 1-2% of the force in the member recommended (ECCS 1985).

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