Browsing by Author "Bilyamin, Ibitoye"

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    Health and Safety Effect of Road Bumps on Vehicle Occupants in Nigeria
    (Leon Publications, 2018) Akinpelu, Mutiu; Bilyamin, Ibitoye; Adeniyi, Adeogun
    On most roads in the developing countries road bumps are traffic calming measures to promote orderly traffic moment, control speed and improve safety. However, their presence constitutes great discomfort to drivers while climbing over them. Most of them are not well placed and their irregularity cause vibration of vehicles wheels and tilting impacts on passengers. The objective of this study is to examine the efficiency of road bumps and their contributing factors on the discomfort and safety of motorists. This paper concentrates on the 14 km stretch of the highway linking the State capital; Ilorin city to the Kwara State University, Malete. The Vibsensor software was used to collect data on thirty-two (32) bumps existing along the study road. Questionnaires were also assessed to enquire from road users on the impact of the vibration on their health. The obtained result indicates possible health hazards to various human body organs such as inner ear, eye oscillation and motion sickness. The study also found that sudden hard braking of most speeding drivers on sighting the bumps result in pitching and tilting of occupants and/or may even lead to driver’s loss of control to cause serious accidents when the vehicle run off the road.
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    Numerical Verification of Strut and Tie Models and Failure Modes of Reinforced Self-Compacting Concrete Deep Beams
    (Trans Tech Publications Ltd, Switzerland, 2020) Akinpelu, Mutiu; Samson, Odeyemi; Bilyamin, Ibitoye; Kabir, Olorede
    This study utilized Finite Element Method (FEM) to analyse the structural behaviour and failure modes of Reinforced Self Compacting Concrete (RSCC) deep beams. Eighteen deep beam specimens subjected to four-point loadings were modelled and analyzed using Abaqus modelling tool. Damage plasticity model was used to characterised the nonlinear behaviour of concrete material while linear elastic, linear-plastic-hardening model represented the reinforcing steel material behaviour. The results of the finite model were compared with four different Strut and Tie Models (STMs) using one-way Analysis of Variance (ANOVA). Results of the numerical study revealed that the concrete strength and shear span to depth ratio mostly affect the load-deflection response of the beams. Also, the failure modes of the studied deep beams were influenced by shear span to depth ratio, concrete strength as well as web reinforcement distribution. The ANOVA results also showed that the FEM outperformed the existing STMs