Torres estaiadas: ações e obtenção dos esforços para dimensionamento

Abstract

With the advances in telecommunications from the 20th century onwards, the world was forced to improve the technologies involved in communication processes. One of these improvements is in the area of building towers capable of transmitting cellular, television and radio signals. Towers are slender structures, which can be selfsupporting or cable-stayed, made of materials such as concrete, wood or mainly steel. In Brazil, the main challenge for towers is to face the wind actions and its random and dynamic nature. Based on this premise, this work presents a method for obtaining static and dynamic loads, considering the ABNT standards for static actions (drag force) and the EUROCODE for dynamic actions (patch loads). Due to the non-linear behavior of these structures, standards around the world require that a rigorous analysis of the structure must be carried out, so that the forces requesting the structure are obtained in an adequate way so that the structure can be designed. Considering this, the modeling and structural analysis of a cable-stayed tower, with a triangular cross section, 56 meters high, was carried out in this work, using simple angles for chords and diagonals. From it, the forces of interest were obtained that allow further design and verification of safety of the structural members.