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

journal contribution
posted on 21.01.2020, 00:00 by I Thiyahuddin, Y Gu, DP Thambiratnam, Prasad GudimetlaPrasad Gudimetla
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.

History

Volume

3

Issue

3

Start Page

257

End Page

273

Number of Pages

17

eISSN

2041-420X

ISSN

2041-4196

Publisher

Multi-Science Publishing

Peer Reviewed

Yes

Open Access

No

Acceptance Date

01/02/2012

External Author Affiliations

Queensland University of Technology

Era Eligible

Yes

Journal

International Journal of Protective Structures