Parametric Optimization of Intze water tanks with respect to the latest guidelines of IS 3370:2021

Abstract

This study has systematically explored the design parameters of Intze water tanks through a parametric investigation, considering cylindrical height-to-diameter ratios (H/D) and conical dome angles (θ) in pursuit of an optimized cost-efficient design. The selected Intze water tanks have had capacities ranging from 200 to 1200 kiloliters, with H/D ranging from 0.2 to 1.0. The angles considered for the conical dome with the vertical axis have included 45°, 50°, and 55°. An in-house software program, developed in C++, has used Heuristic optimization methods and integrated features for analysis, design, and estimation. The design approach has followed the limit state method, incorporating crack width calculations for all water-retaining members. The research findings have indicated specific design preferences, such as the preference for an H/D ratio of 0.8 for the 200-kL tank and a consistent recommendation of a 0.3 H/D ratio for capacities between 400 kL and 800 kL. Notably, there has been a deliberate shift in design for capacities ranging from 800 kL to 1200 kL, favoring lower H/D ratios between 0.2 and 0.3. The study has also identified cost-efficient strategies, with the utilization of a 50° conical dome angle proving to be cost-effective for the 200-kL tank, while a 45° angle has been recommended for capacities ranging from 400 kL to 1200 kL. The research highlights that optimizing H/D ratios and θ values can significantly reduce material usage and costs in water tank construction, offering substantial savings in large-scale projects. © 2024, National Institute of Science Communication and Policy Research. All rights reserved.