Abstract
This paper deals with the effectiveness of various bracing systems used in lattice towers. Seven types of bracings used in 4-legged square based self-supporting power transmission and telecommunication towers and four types of bracings used in 3-leg triangular based self-supporting telecommunication towers are analyzed. The investigated bracing systems are K, KD, Y, YD, D, XB and X. This study has focused on identifying the economical bracing system for a given range of tower heights. Towers of height 40 to 60 m for telecommunication and 35 m for transmission towers have been analyzed under critical loads such as wind and earthquake loads. The load cases include diagonal wind has been found to be most critical cases for towers. The performance of various bracing system has been identified and reported.
Highlights
The expansion of the telecommunication systems, as well as the natural requirements for increasing the electrical power transmission systems in the world were the main reasons for the continuous demands for the production of steel transmission and telecommunication towers
The result of the linear and nonlinear analysis show that bracing systems used in tower show different structural behavior
The best structural performance and smallest weight is obtained at D type bracing systems for power transmission towers
Summary
The expansion of the telecommunication systems, as well as the natural requirements for increasing the electrical power transmission systems in the world were the main reasons for the continuous demands for the production of steel transmission and telecommunication towers. Lattice type steel structures have long been largely utilized in World to support cellular and microwave transmission antennas or to enable electrical power transmission lines to be built interconnecting the cities and countries territory [1]. Latticed structures are ideally suited for situations requiring a high load carrying capacity, a low self-weight, an economic use of materials, and fast fabrication and construction. For these reasons self-supporting latticed towers are most commonly used in the field of telecommunication and power line system. The goal is to produce an economical structure that is well proportioned and attractive [3]
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