Faculty Publications
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Publications by NITK Faculty
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Item A Numerical Study on the Shear Strength of Pervious Concrete Column in Weak Ground(Southeast Asian Geotechnical Society, 2022) Rashma, R.S.V.; Jayalekshmi, B.R.; Shivashankar, R.In this study, the response of pervious concrete column-treated ground under shear loading is examined by employing a series of numerical analyses. The shear behaviour of pervious concrete column-treated ground is compared with stone column-treated ground and weak ground. Two types of analyses were carried out to assess shear strength of the composite ground. Conventional direct shear test model and large shear test models were evaluated using ABAQUS software. The pervious concrete column-treated ground is observed to have greater shear strength than the mere stone column-treated ground. The lateral deflection pattern of the pervious concrete column is also noticed to be very much lesser than conventional stone columns under static shear loading. The overall shear performance of the pervious concrete column-treated ground is found to be improved than the typical stone column-treated ground. © 2022, Southeast Asian Geotechnical Society. All rights reserved.Item Innovative floating hybrid baffles for improved performance of liquid storage tanks under seismic excitations(Taylor and Francis Ltd., 2025) Jogi, P.; Jayalekshmi, B.R.Liquid storage tanks (LSTs) are highly susceptible to sloshing under dynamic motion, which can compromise their structural stability. This study introduces novel floating wooden and hybrid baffles with a rubber-encased wooden core, offering enhanced energy dissipation and durability. Unlike fixed baffles, their floating design allows for adaptation to changes in liquid levels. Numerical simulations were conducted using ABAQUS to evaluate the performance of these baffles in reducing sloshing-induced responses. The LST, with and without baffles, was subjected to Imperial Valley and Northridge ground motions. Three baffle configurations with varying widths were analyzed for reducing liquid sloshing, hydrodynamic pressures, and enhancing energy dissipation at different liquid depths. The results indicate that the medium-width hybrid baffles reduce the sloshing heights by 51% while maintaining sufficient fluid flow. Hybrid baffles significantly reduced convective pressures by 57% and showed superior energy dissipation than wooden baffles. These findings confirm their effectiveness in controlling liquid sloshing. © 2025 Informa UK Limited, trading as Taylor & Francis Group.Item Sloshing mitigation in liquid storage tanks using vertical floating wooden baffles(Springer, 2025) Jogi, P.; Jyothish, S.S.; Jayalekshmi, B.R.Liquid storage tanks (LSTs) are essential infrastructure but susceptible to failure due to liquid sloshing during seismic events. This sloshing generates additional hydrodynamic forces, which can impose pressure on the tank walls. Conventional methods to mitigate sloshing often rely on rigid internal structures, which can be expensive and inflexible. To overcome these challenges, the present study investigates the effects of lightweight floating wooden baffles that adapt to the liquid level within the tanks, offering a more flexible and cost-effective solution. This research aims to assess the performance of vertical floating wooden baffles in mitigating sloshing within liquid storage tanks. Numerical analysis was conducted on 3D ground-supported rectangular tanks with seven different baffle configurations, including both solid and porous designs, using the arbitrary Lagrangian–Eulerian (ALE) approach in ABAQUS. The models were subjected to horizontal seismic ground motion records from the Imperial Valley and Northridge earthquakes. Critical parameters such as sloshing wave height, hydrodynamic pressures and kinetic energy in the LST were analysed. The findings reveal that porous wooden baffles positioned near the tank walls are particularly effective in reducing sloshing and the associated hydrodynamic forces, offering a cost-efficient solution to enhance the safety of LSTs during seismic events. © Indian Academy of Sciences 2025.