الفهرس 
DECLARTIONOnly 14 pages are availabe for public view
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Abstract
”This thesis comprehensively investigates the structural performance of these Steel-Concrete-Steel poles. The objective is to understand the behaviour of these poles through a combined approach involving numerical modelling, analytical analysis, and experimental testing. To investigate the structural behaviour of Stobie poles, a preliminary 3D finite element analysis, referred to as ’Stage 1 model,’ was developed to simulate the response of the poles to lateral loading in both the strong and weak axis directions. These numerical simulations offer valuable insights into the behaviour of the poles, and their accuracy is verified by comparing the results with experimental data. Additionally, an analytical model based on Euler-Bernoulli’s beam theory was developed to simulate the behaviour of these structures, considering the tapering of the poles, material nonlinearity, and the partial shear interactions. A MATLAB code was implemented to apply this model to the solution of such poles. Next, an advanced FEM model, referred to as ’Advanced model,’ was developed to simulate the behaviour of Stobie poles under biaxial bending, considering the presence of the pulley-cable loading system, allowing poles to rotate during loading. The ’Advanced model’ successfully simulated the poles’ response under this biaxial loading. The obtained results are compared with experimental data, demonstrating a satisfactory agreement, and validating the model’s accuracy. Then, various pole parameters are thoroughly analysed, including bolt diameter, pretension forces in the bolts, bolt yield strength, steel yield strength, and the impact of concrete strength on pole capacity.