Faculty Publications

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Publications by NITK Faculty

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    Effect of stiffness on performance of a diaphragm wall with irregular configuration
    (National Institute of Science Communication and Policy Research, 2018) Yajnheswaran, B.; Rao, S.
    Present study investigates the influnces of the stiffness on the performance of a lateraly loaded R.C.C diaphragm wall and an inter-comparison has been made between the actual and compound sections by modelling the wall using Plaxis 3D software. Displacement and bending moment are found out for diaphragm walls and results are compared with the actual diaphragm wall section having 1.1m thick.The study concludes that when two sections of different stiffness are coupled to form a single section, the stiffer member takes higher bending moment and the magnitude depends the stiffness of the thinner member. © 2018, National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved.
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    Optimizing Seismic Earth Pressure Estimates for Battered Retaining Walls Using Numerical Methods and ANN
    (Springer Science and Business Media Deutschland GmbH, 2024) Thottoth, S.R.; Khatri, V.N.; Kolathayar, S.; Keawsawasvong, S.; Lai, V.Q.
    This study comprehensively analyzes seismic active earth pressure estimation for hunched retaining walls. The analysis utilizes the horizontal slices method within the modified pseudo-dynamic framework and incorporates depth-dependent dynamic parameters for the backfill soil. The friction angle of the backfill soil varied between 30° and 45°, while the hunch angle of the retaining wall increased from 0° to 20°. The findings of this study demonstrate that the use of hunched retaining walls results in a significant reduction in active earth pressure. In both static and dynamic cases, reductions of up to 23% and 18%, respectively, compared to vertical walls, were observed. Notably, this reduction is more pronounced for smooth walls under static conditions than for rough walls under dynamic conditions. The estimated active earth pressures for both vertical and hunched walls in static and dynamic scenarios closely align with those reported in the literature. Additionally, an empirical equation based on an artificial neural network model, utilizing the numerical analysis result, is proposed to establish a relationship between the investigated design parameters and the active earth pressure coefficient. The proposed equation demonstrated a high coefficient of determination (R2) value of 99.78% when compared to the numerical results. This study’s outcomes provide valuable insights and a tool for practicing engineers in the field. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.