الفهرس 
BACKGROUNDOnly 14 pages are availabe for public view
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Abstract
In January 2010, 81 towers had failed at Aswan, Egypt as a result of high intensity wind (HIW). The wind speed reached a value of 200 km/h., and the pressure induced from this wind was 193 kg/m2, which is strongly higher than the design values. The economic drawbacks from the interruption of the electrical network are huge. Thus the study of the modes of failure, the causes of failure of these towers is essential. The lessons drawn from this disaster leads to the necessity to evaluate the design wind speed and the requirement of mitigate the (HIW) effects.
This thesis examines the feasibility of employing nonlinear pushover analysis, incremental dynamic analysis due to capture the full capacity of transmission towers to the wind loads, consequently predict the structures response under HIW.
Tracing the plastic-hinges formulation using the Pushover technique as well as the application of random wind dynamic loads have been illustrated. Analysis consequences are then used for determining the capacity curves in regards to the total horizontal force versus the displacement at the peak of the transmission tower (T.T). The collapse can be defined by the point that has no convergence for a raised wind load.
The advantage of using this technique is the resulting of significant savings in capital, and the reduction of the need for the tower comprehensive testing that is ordinary in the T.T industry. Recommendations for the design engineer regarding the mitigation of the failed towers are given.