Abstract
Design of latticed steel transmission towers is a challenging task which involves lengthy modeling and detailing of significant amount of steel members and connections. After that full scale testing of towers validates the modeling and detailing and ensures that the towers are designed to withstand design loads without premature failures. In present work, a 132 kilovolt double circuit suspension tower has been considered for study. The tower was designed using Staad.pro software and the member forces were calculated at design loads. After design, the full scale testing of the tower was carried out. During testing, the strains in some of the critical members were measured using strain gauges. Using these strain values, the actual load in selected members are calculated. The paper provides the comparison between actual load in members during full scale testing and computed loads from software. The paper also discusses the possible reasons behind the difference between actual and computed loads. Loads on the tower at different points for different conditions are presented. The paper also provides a discussion about the possible reasons of premature failure of tower during full scale testing or at site and the remedial measures are presented to avoid the failure.
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