Loading...
Analytical deflection modelling of symmetric non-prismatic reinforced laterite-concrete slabs
Ogbo, Ocholuje Samuel Ndububa, Emmanuel E. Adeshina, Mutolib Kehinde
Ogbo, Ocholuje Samuel
Ndububa, Emmanuel E.
Adeshina, Mutolib Kehinde
Editors
Other contributors
Epub Date
Issue Date
2025-04-09
Submitted date
Alternative
Abstract
This study investigates the intricate interplay between geometric attributes and mechanical characteristics of non-prismatic concrete slabs. Analytical models were derived which showed the extent to which the geometry, as well as the mechanical properties of non-conventional constituent materials, influence the flexural response of non-prismatic slabs. This study adapted the Euler-Bernoulli beam theory as well as the theory of plates and shells to derive a time-dependent model. The derived time-deflection response includes a Weierstrass function which was resolved through the assumptions of appropriate boundary conditions. Experiments were also carried out to obtain basic mechanical properties of reinforced laterite-concrete prismatic beams which were used as input parameters in the analytical model for the non-prismatic slabs. The singly reinforced concrete slab model investigated showed a non-linear relationship between the anchorage bond and the shear adequacy due to the addition of laterite, thereby increasing the shear capacity of the slab by over 70 % at a replacement of total aggregate volume by 22 % of laterite. The optimization of aggregate proportion was obtained using a pseudo-inverse model, with coefficients of determination of 99.91 % and 99.95 % for the respective grades of concrete, hence indicating the robustness of the findings. This study is expected to contribute to the development of more precise analytical models for designing and optimizing non-prismatic concrete slabs.
Citation
Ogbo, O.S., Momoh, E.O., Ndububa, E.E. and Adeshina, M.K. (2025) Analytical deflection modelling of symmetric non-prismatic reinforced laterite-concrete slabs. Engineering Structures, 334, 120255.
Publisher
Journal
Research Unit
PubMed ID
PubMed Central ID
Embedded videos
Additional Links
Type
Journal article
Language
en
Description
©2025 The Authors. Published by Elsevier. This is an open access article available under a Creative Commons licence. The published version can be accessed at the following link: https://doi.org/10.1016/j.engstruct.2025.120255
Series/Report no.
ISSN
0141-0296
EISSN
1873-7323