Browsing by Author "Ganeshwaran, R"

Now showing 1 - 3 of 3

item: Thesis-Abstract
Computerized optimization of the base width of transmission towers in Sri Lanka
(2015-02-22) Ganeshwaran, R; Hettiarachchi, MTP; Baskaran, K
Transmission line towers were mainly used in electrification works in all over the world. Optimization of base width of the transmission towers becomes necessary in order to reduce the cost and to avoid public objection. The use of narrow width tower becomes essential, as the land value appreciates drastically in Sri Lanka. This research is to design the transmission towers with reduced base width to minimize the coverage land with optimum weight and adequate strength. There were number of models selected with 14.2m base width and analyzed by reducing the width in steps from 1m to 3.2m. For this purpose computerized model analysis software named PLS Tower was used. Accordingly cost analysis was carried out for different steel prices and the cost of land. As per this study Optimum base width of 6.2m was found considering both the land & steel price. When compared with the towers used in Sri Lanka, it was found that the narrow width towers designed from this study showed a considerable amount of saving in cost and favourable impact on environmental issues.
item: Thesis-Abstract
Computerized optimization of the based width of transmission towers in Sri Lanka
(2015-06-24) Ganeshwaran, R; Hettiarachchi, MTP
Transmission line towers were mainly used in electrification works in all over the world. Optimization of base width of the transmission towers becomes necessary in order to reduce the cost and to avoid public objection. The use of narrow width tower becomes essential, as the land value appreciates drastically in Sri Lanka. This research is to design the transmission towers with reduced base width to minimize the coverage land with optimum weight and adequate strength. There were number of models selected with 14.2m base width and analyzed by reducing the width in steps from 1m to 3.2m. For this purpose computerized model analysis software named PLS Tower was used. Accordingly cost analysis was carried out for different steel prices and the cost of land. As per this study Optimum base width of 6.2m was found considering both the land & steel price. When compared with the towers used in Sri Lanka, it was found that the narrow width towers designed from this study showed a considerable amount of saving in cost and favorable impact on environmental issues.
item:
Do steel transmission towers in Sri Lanka have an optimum base width?
Hettiarachchi, MTP; Baskaran, K; Ganeshwaran, R
Structural engineers responsible for designing transmission towers optimize the cost of towers by minimizing the weight of a steel tower. However, with the escalating prices of land and increasing concern on environmental issues, it is necessary to minimize the extent of land area occupied by the towers as well. This paper discusses an extensive study on the design of a typical suspension tower in a 132 kV transmission line. The base widths considered were in the range of 3.0 m to 14.2 m. Different heights of towers were considered by varying body extensions from +0 m to +12 m. The study indicated that the weight of steel tower increased 10% to 16%, whereas the land area increased approximately twenty fold. Thus the impact of land value is considerable. The overall cost of tower was computed to include the cost of steel used in the tower and value of land area. Variation in steel unit costs and land prices were also considered in the study. The optimum base widths were found to be in the range of 4.5 m to 6.0 m for lower values of land and 2.7 m to 4.2 m for higher values of land Base widths of existing towers are in the range of 6.5 m to 9.6 m. This study has thus confirmed that considerable cost savings can be realized by optimizing the cost of steel towers by incorporating the value of land as well. An optimum ratio of 6.7 has been obtainedfor height to base width for the range of towers considered.