Impact and energy absorption of road safety barriers by coupled SPH/FEM

Thiyahuddin, Izzat, Gu, YuanTong, Thambiratnam, David, & Gudimetla, Prasad (2012) Impact and energy absorption of road safety barriers by coupled SPH/FEM. International Journal of Protective Structures, 3(3), pp. 257-274.

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Road safety barriers are used to minimise the severity of road accidents and protect lives and property. There are several types of barrier in use today. This paper reports the initial phase of research carried out to study the impact response of portable water-filled barrier (PWFB) which has the potential to absorb impact energy and hence provide crash mitigation under low to moderate speeds.

Current research on the impact and energy absorption capacity of water-filled road safety barriers is limited due to the complexity of fluid-structure interaction under dynamic impact. In this paper, a novel fluid-structure interaction method is developed based on the combination of Smooth Particle Hydrodynamics (SPH) and Finite Element Method (FEM). The sloshing phenomenon of water inside a PWFB is investigated to explore the energy absorption capacity of water under dynamic impact. It was found that water plays an important role in energy absorption. The coupling analysis developed in this paper will provide a platform to further the research in optimising the behaviour of the PWFB. The effect of the amount of water on its energy absorption capacity is investigated and the results have practical applications in the design of PWFBs.

Impact and interest:

5 citations in Scopus
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ID Code: 53562
Item Type: Journal Article
Refereed: Yes
Keywords: Energy absorption, Coupled Analysis, SPH, road barriers, fluid structure interaction, finite element analysis
DOI: 10.1260/2041-4196.3.3.257
ISSN: 2041-4196
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Numerical Modelling and Mechanical Characterisation (091307)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 11 Sep 2012 22:03
Last Modified: 22 Jun 2017 06:43

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