A new approach to the calculations of the limit load of steel structure supports of electric overhead lines of the highest tensions |
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| Affiliation: | 1. Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia;2. Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia;3. School of Biomedical Sciences, Centre for Immunity and Infection Control, Queensland University of Technology, Herston, QLD 4029, Australia;4. Metro North Hospital and Health Service, Office of Research, Herston, QLD 4029, Australia;6. Department of Earth and Environmental Sciences, Faculty of Science and Engineering, Macquarie University, Sydney, NSW 2109, Australia;1. School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China;2. Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China |
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| Abstract: | Starting from the Lagrange equations the generalized algebraic eigenproblem has been obtained. The notions of the statical compression measure density matrix as well as the coefficient α of the statical compression measure density (α-N) of the bar finite element have been introduced. On the basis of the above formulae the limit load P of the two steel structure supports of 110 kV electric lines has been calculated using the author's own CAD system named SLEN. After solving the generalized algebraic eigenproblem, the lowest eigenvalue α1 < 1 for all cases has been calculated. The average value of the α1, was about 0.7. Then the calculated limit load P was about 30% lower than the real limit load Po. For the technical conformity of the limit loads, calculated (P) and measured at the trial station (Po), the following has been proposed: - 1.(1) assumption of the statical compression measure density coefficient α ≠ 1,
- 2.(2) assumption of the relation α = α1,
- 3.(3) calculation of the coefficient α1 by the statistical identification process.
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