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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References
1.
Alam, M. J. (1993). “Methodologies for reliability-based design of transmission line systems,” PhD thesis, Anna Univ., Madras, India.
2.
Alam, M. J., and Santhakumar, A. R. (1990). “COMRELIA—a software program for component reliability analysis of transmission towers.” Dept. of Civ. Engrg., Anna Univ., Madras, India.
3.
ASCE manuals and reports on engineering practice No. 52; guide for design of steel transmission towers. (1988). 2nd Ed.,. ASCE, New York, N.Y.
4.
ASCE manuals and reports on engineering practice No. 74; guidelines for electrical transmission line structural loading. (1991). ASCE, New York, N.Y.
5.
Australian Telecom. (1991). “Design philosophy for communication structures.”Internal Rep., Melbourne, Australia.
6.
Bathon, L. A., Muller, W. H., and Kempner, L. Jr. (1993). “Ultimate load capacity of single steel angles.”J. Struct. Engrg., ASCE 119(1), 279–300.
7.
Conference International Des Grands Reseaux Electriques. A Haute Tensic (CIGRE). (1990). “Overhead Lines,”Progress Rep. of Working Groups, Study Committee-22.
8.
“Indian standard code of practice for use of structural steel in overhead transmission line towers.” (1977). IS:802, Bureau of Indian Standards, New Delhi, India.
9.
“Indian standard code of practice for use of structural steel in overhead transmission line towers.” (1992). IS:802, Bureau of Indian Standards, New Delhi, India.
10.
“Interim standard for the design of steel lattice towers and masts.” (1991). AS 3995, Australian Standards, Sydney, Australia.
11.
International Electrotechnical Commission (IEC). (1992). “Loading and strength of overhead lines.”IEC Rep. 826, Geneva, Switzerland.
12.
Kennedy, J. B., and Murthy, M. K. S. (1972). “Buckling of steel angles and tee struts.”J. Struct. Div., ASCE, Vol. 98, 2507–2522.
13.
Kitipornchai, S., and Lee, H. (1984). “Inelastic experiments of angles and tee struts.”Res. Rep. No. CES4, Dept. of Civ. Engrg., Univ. of Queensland, Australia, 1–28.
14.
LeMaster, R. A. (1986). “Structural development studies at the EPRI transmission line mechanical research facility.”Interim Rep. 1, EPRI, EL-4756, Electric Power Res. Inst. (EPRI), Inc., Palo Alto, Calif.
15.
Peyrot, A. H., and Dagher, H. J(1984). “Reliability-based design of transmission lines.”J. Struct. Engrg., ASCE, 110(11), 2758–2777.
16.
Pham, L., Holmes, J D., and Yang, J. (1992). “Reliability analysis of Australian communication lattice towers.”J. Constr. Steel Res., Australia, Vol. 23, 225–272.
17.
Prickett, S. L., and Muller, W. H. (1983). “Limit analysis of lattice structures.”Res. Rep., Bonnevillee Power Admin.
18.
Stang, A. H., and Strickenburg, L. R.(1922). “Results of some compression tests of structural steel angles.”Tech. Papers, Bureau of Standards, U.S. Dept. of Commerce, 16(28), 651–667.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 122 • Issue 3 • March 1996
Pages: 338 - 344
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: Mar 1, 1996
Published in print: Mar 1996
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