Author:-Amrit Pal Singh
Abstract :-The parametric study of the tower testing high mast is carried out in different ways. High mast mainly governs under high conductor tensions due to testing and wind action on an exposed area. These high mast towers are generally used at tower testing stations to test the working towers, transmission line towers and poles. Two masts are present to test a tower, one of them is Longitudinal Mast, and the other is Transverse Mast. These masts have 'n' numbers of columns and beams according to the size of tower beds, the height of towers/poles, conductor tension force and angle of pull. In the study, the tower model is fixed in line with geometry and wind force applied to the exposed area of the mast and conductor tension force with different loading points and locations on the horizontal beams of the high mast. The analysis is done using "STAAD.pro V8i SS5" software. The tower height is taken as 112m in the studywith two main beams at 60m and 110m level (bottom of steel) in elevation. The different type of bracing pattern is used to equalise the structural behaviour. The basic parameters which are studied using nonlinear static analysis are the Beam Axial Forces (Compression and Tension), Deflection&Support Reactions of the Mast tower, and it is ensured that the structural members are utilising their full strength to resume and resist the torsion, bucking effects and uniformly distributes force behaviour.
The wind force is computed with IS875: part-III, in which different categories factors are used according to mast height, locations and other ones. The analysis and design of the tower are done with IS: 802 Â part-2. The applications of the mast towers are at each testing station for testing 132kV to 1200kV gantry, transmission line towers, steel poles and for reviewing the same.
Keywords: - Mast tower, Stresses, Deflection, Structural Behavior
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