Paper
Validation of a Linearized Seismic Analysis Method for Tall Telecommunication Masts
- Authors:
- S. Ali Ghafari Oskoei; Mahtab Ghafari Osgoie; Ghyslaine McClure
- Abstract
- Ghafari and McClure (2011, 2012) have developed a new robust linearized seismic analysis method for tall guyed telecommunication masts for design check purposes. This method provides a conservative prediction of the maximum lateral seismic displacements of the mast at the multiple stay levels. Its analytical development duly accounted for the geometric nonlinear response of the guy cables and the cable-mast dynamic interactions. The method was calibrated using detailed nonlinear dynamic analysis of nine real guyed masts subjected to a few earthquake signatures. This paper presents a more extensive evaluation of the proposed method and discusses some trends observed in the results for two selected guyed telecommunication masts under the effects of eighty-one recorded Californian earthquakes. Based on the maximum mast displacements predicted by the linearized method, approximate values are calculated for the maximum cable reactions at their tower attachment point, the maximum cable tensions, and the internal bending moments and horizontal shear forces in the mast. A comparison of the detailed nonlinear dynamic analysis results with those obtained from the linearized simplified method confirms the reliable performance of the simplified method.
- Keywords
- Seismic Design; Telecommunication Masts; Guyed Towers; Ambient Vibration Measurement; Structural Dynamic
- StartPage
- 163
- EndPage
- 170
- Doi