Advanced Design Criteria for Stronger Towers
Supervisors: Prof. MTR Jayasinghe, Dr. CS Lewangamage
Department: Civil Engineering
Telecommunication towers play a vital role in any country by seamlessly connecting the people in modern world including Sri Lanka. Due to tall slender nature and locations of towers, overall structural robustness and the structural adequacy of individual members and connections of these structures are utmost important under all kinds of extreme events such as cyclones, earthquakes, etc. Accordingly, this study focuses on investigating the structural performances of self-supporting steel lattice towers under regional seismic loading conditions and development of a design guideline for baseplates with governing uplift load condition, where such a guideline is presently not available for industrial use.
A detail study was carried out to assess structural performances of self-supporting lattice towers under different sub soil conditions. The main finding of this analysis is that for the likely seismic hazard levels in Sri Lanka, key elements of towers will be subjected to much lower stress levels than induced by the winds of design magnitudes, which usually governs the design.
Development of a design guideline for baseplates was focused to fulfil the industrial need as the other main objective. An effective design guideline was developed through a comprehensive analytical and experimental study for design office applications.
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