ANALYTICAL STUDY ON NATURAL DRAUGHT COOLING TOWER BY FEM ANALYSIS AND PILING ANALYSIS USING RIVET THEORY IN COASTAL AREAS

Vamsee Krishn N V(1*)

(1) , India
(*) Corresponding author


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Abstract


The aim of the study is to analyze the behavior of NDCT resting on vertical pile foundation in prevailing soil conditions of the coastal areas using rivet theory. The behavior of NDCT has been carried out with twenty-seven types of shell thickness variation models. The methodology adopted is FEM analysis of NDCT super structure alone and piling analysis using rivet theory. Piling layout was designed based on the engineering properties of the soil, the safe capacities in compression, tension and horizontal load distribution. The tower was analyzed for wind loads as per the provision of IS 875, IS 11504 with an interference factor (IF) of 1.573. Piling analysis was carried out for load combinations 1.0DL + 1.0 WL and 1.0 DL + 1.5 DL. The findings showed that piling analysis using rivet theory underestimates the distribution of lateral forces on largely. Overall, the findings showed that the pile did supported reactions and indicated same value of horizontal loads on all piles. The maximum resultant deflection at each level along the height to the NDCT was poor than the previous studies in super structure model, this in turn would affect the stressed in the shell.
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Keywords


FEM Analysis, Natural draught Cooling Towers, Coastal Region, Rivet theory, Shell thickness, Thermal power, Vertical Pile foundation, Wind Load analysis.

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