Jarasjarungkiat, Amphon

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Jarasjarungkiat, Amphon
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Email
amphon.ja@kmitl.ac.th

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    Numerical Modelling for Energy Absorption of Reinforced Concrete Barriers Covered with Natural Rubber
    (2020-01-01)
    Aung, Lwin Lwin
    ;
    Jarasjarungkiat, Amphon
    ;
    Banyam, Suvisit
    Due to the oversupplying, applications of natural rubber are widely introduced in Thailand. In this research, a deployment of natural rubber with typical road safety concrete barrier is investigated numerically. There are many various kinds of barriers to be used not only to prevent vehicles from collision with an opposite vehicle but also to protect from roadside hazards. Therefore, nonlinear finite element modelling was employed to investigate the more efficiencies of barrier covered with rubber sheets by means of finite element analysis. The three-dimensional model is involved with three different homogeneous materials under static analysis while applying an area load representing a car colliding to the barrier. The results have shown that barrier with rubbers can absorb impact force from the vehicles.
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    The Benefits of Using Rubber Material in Two Variances: The Rubberized Concrete and the Natural Rubber Sheet, to Strengthen Concrete Barriers for Crash Energy Absorption
    (2024-08-01)
    Aung, Lwin Lwin
    ;
    Jarasjarungkiat, Amphon
    Given the frequency of road accidents, a critical evaluation of the strength of road safety devices has become imperative. This research explores reinforced concrete barriers protected with rubber materials, incorporating different ratios of rubber powder derived from waste and various thicknesses of natural rubber sheets. Two approaches were employed: the first used crumb rubber from recycled tires to prepare barrier samples with varying rubber content ratios (0%, 15%, and 30% by volume); the second involved attaching concrete barriers with natural rubber sheets of different thicknesses (30 to 70mm). These barriers were subjected to frontal impact loads generated by vehicles traveling at 35mph. A crash dynamic was conducted using nonlinear explicit analysis in numerical modeling within a finite element simulation framework. The primary objectives were to monitor the crash energy absorbed by the rubber material, scrutinize deflection patterns, and assess overall energy absorption capabilities. The results indicated that natural rubber sheets absorbed approximately 20% to 47% of the maximum internal energy, reducing the impact on the concrete barrier. The 30% crumb rubber content of barriers also exhibited significantly higher energy dissipation than standard concrete barriers. This improvement in energy absorption and deflection properties carries significant implications, including reduced maintenance costs, decreased accident-related injuries, and minimized vehicle damage. These findings underscore the importance of developing and implementing rubber materials in two methods to enhance impact resistance and energy absorption in road safety infrastructure.
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    Crash energy absorption aspects of reinforced concrete barriers with natural rubber sheet
    (2021-09-15)
    Aung, Lwin Lwin
    ;
    Jarasjarungkiat, Amphon
    These days, vehicles are widely developed because of the latest technology. As a result, roadside barriers are used not only to minimize the speed of vehicles but also to prevent crossing into the opposite lanes. Many technologies are used to improve the strength of barriers. On the other hand, the production of natural rubber in Thailand is higher than in other Asian countries. The ministry of transportation is focusing on using rubber in roadside barriers. Therefore, in this study, three different types of vehicles with 920, 1575, and 2013 kg at a constant velocity of 35 mph for frontal impact were used to compare the strength of reinforced concrete barriers with and without natural rubber by using non-linear dynamic finite element analysis. Results proved that the barriers with rubber sheets stored energy absorption better than those without rubber sheets.
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    Numerical modelling for energy absorption of reinforced concrete barriers covered with natural rubber
    (2020-08-31)
    Aung, Lwin Lwin
    ;
    Jarasjarungkiat, Amphon
    ;
    Banyam, Suvisit
    Due to the oversupplying, applications of natural rubber are widely introduced in Thailand. In this research, a deployment of natural rubber with typical road safety concrete barrier is investigated numerically. There are many various kinds of barriers to be used not only to prevent vehicles from collision with an opposite vehicle but also to protect from roadside hazards. Therefore, nonlinear finite element modelling was employed to investigate the more efficiencies of barrier covered with rubber sheets by means of finite element analysis. The three-dimensional model is involved with three different homogeneous materials under static analysis while applying an area load representing a car colliding to the barrier. The results have shown that barrier with rubbers can absorb impact force from the vehicles.