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Dynamic Analysis Of Transmission Line Towers

Authors: Srikanth L.; Neelima Satyam D.;

Dynamic Analysis Of Transmission Line Towers

Abstract

{"references": ["Anil K.Chopra (2011) Dynamics of Structures: Theory applications to Earthquake Engineering. Third Edition, India Pearson Publication.", "B.C.Punmia, Ashok kumar Jain & Arjun Kumar Jain, (2005) Design of steel structures. Laxmi Publications.", "Dr.Ramchandra & Virendra Gehlot. Design of steel Structures-2, India, Scientific Publishers(2010)", "Gopiram Addala & D.Neelima Satyam (2010) Dynamic analysis of transmission towers under strong ground motion Third international Earthquake Symposium Bangladesh,5-6 March 2010.", "Aziz, T.S., Ghobarah, A.,& EL-Attar, M. (1996) Non Linear Dynamics of Transmission Lines Eleventh World Conference on Earthquake Engineering Elsevier Science Ltd. paper No: 1616.", "Indian Standards, IS 802- Part1/sec2:1995- Use of Structural steel in Overhead Transmission Tower- Code of Practice, India 1995", "Indian Standards IS 875- Part3-1984- Wind Load Analysis of Structures \u2013Code of Practice, India, 1995", "Indian Standards IS:398(part2)-1996, Aluminium conductors for reinforced transmission Purposes-Specification, India 1996", "Indian Standards IS 5613- part1/sec1:1985- Code of Practice for design, installation, and maintenance of overhead power lines. India 1986\n[10]\tIndian Electricity Rules-1956\n[11]\tIndian Standards IS: 800: 2007. Code of practice - General Construction Steel. New Delhi: BIS; 2007.\n[12]\tIndian Standards IS: 1893 (part1):2002. Criteria for earthquake resistant design of structures. New Delhi: BIS; 2002.\n[13]\tBently. Staad.Pro V8i. (series 4) (software) Bently Corporation,USA. 2009.\n[14]\tMATLAB(13a) (software) The MathWorks, Inc."]}

The transmission line towers are one of the important life line structures in the distribution of power from the source to the various places for several purposes. The predominant external loads which act on these towers are wind and earthquake loads. In this present study tower is analyzed using Indian Standards IS: 875:1987(Wind Load), IS: 802:1995(Structural steel), IS:1893:2002 (Earthquake) and dynamic analysis of tower has been performed considering ground motion of 2001 Bhuj Earthquake (India). The dynamic analysis was performed considering a tower system consisting two towers spaced 800m apart and 35m height each. This analysis has been performed using numerical time stepping finite difference method which is central difference method were employed by a developed MATLAB program to get the normalized ground motion parameters includes acceleration, frequency, velocity which are important in designing the tower. The tower is analyzed using response spectrum analysis.

Keywords

Response Spectra, Transmission Tower., Dynamic Analysis, Central Difference Method

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