SEISMIC RESPONSE OF TRANSMISSION TOWER - A CASE STUDY

Tejaswini G, Subramanya P G

Abstract: Towers and tower like structures are the major infrastructure for the transmission of electrical power, telecommunication and broadcasting. The transmission towers are highly repetitive and therefore the analysis and designs should be highly competitive towards commercial solutions. In the present study, an attempt has been made to analyse the existing Electrical Transmission tower of voltage 220kV using FEM software NISA. The analysis of an existing structure without secondary bracings has been carried out for the North-South Component of EL-Centro Ground motion, 1940.In this analysis, the stiffness and damping properties have been considered for improving the seismic performance of the existing structure. By keeping the Group number as it is, using different sections, the geometric properties of the given angle section are optimized to optimized angle section and optimized tubular section. For cross braces, the damping value is varied ranging from 5%-25% for above sections. In this analysis, the displacement at top cross-arm of the tower is considered as the main parameter for conservative results. Finally the results obtained are regarding possible improvements in the analysis of the existing structure

Keywords: activated carbon mustard stalk, reactive blue 4, simultaneous adsorption and biodegradation (SAB), Pseudomonas putida

DOI: https://doi.org/10.15623/ijret.2015.0410068