Reliability Analysis and Full-Scale Testing of Transmission Tower
Publication: Journal of Structural Engineering
Volume 122, Issue 3
Abstract
The new generation of reliability-based load and resistance factor design (LRFD) method for the design of electric transmission line structures at member level is governed by ASCE Manual 74 . Transmission towers generally comprise steel angle components. The nominal strength of these components, for various end conditions and slenderness ratios, is widely calculated using the design equations in ASCE Manual 52 for the reliability-based design (RBD). There are known inconsistencies in the RBD of tower members using these ASCE Manuals, particularly in the case of members in compression. Considering these facts, the effect of buckling, joint connections, and framing eccentricities on the RBD of components have been examined and limiting values of the slenderness ratio ( L /r) for the compression member alone are proposed in this technical note. A 220-kV tangent tower has been used for full-scale testing to validate the analytical results, and a good agreement with the predicted results indicates a definite need for an improvement of ASCE Manual 52 and the relevant Indian standards.
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Copyright © 1996 American Society of Civil Engineers.
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Published online: Mar 1, 1996
Published in print: Mar 1996
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