Numerical Analysis of Concrete Crash Barriers

Reinforced concrete crash barriers used in road traffic must meet a number of criteria. Crash barriers are laid lengthwise, one behind another, and joined using specially designed steel locks. While developing BSV reinforced concrete crash barriers (type ŽPSV), experiments and calculations aimed to optimize the shape of a newly designed lock and the reinforcement quantity and distribution in a crash barrier were carried out. The tension carrying capacity of two parallelly joined locks was solved experimentally. Based on the performed experiments, adjustments of nonlinear properties of steel were performed in the calculations. The obtained results served as a basis to optimize the lock design using a computational model that takes into account the plastic behaviour of steel and the influence of the surrounding concrete [6]. The response to the vehicle impact has been analyzed using a specially elaborated complex computational model, comprising both the nonlinear model of the damping wall or crash barrier and the detailed model of the vehicle [7].

Authors:

• J. Kala
• P. Hradil
• V. Salajka

Keywords:

• Crash Barrier
• impact
• static analysis
• concrete nonlinear model.

References:

[1] Y. D. Murray Theory and Evaluation Concrete Model 159, 8th
International, LS-DYNA Users Conference, Detroit, 2004
[2] L. E. Schwer, Y. D. Murray Continuous Surface Cap Model for
Geomaterial Modeling: A New LS-DYNA Material Type, 8th
International, LS-DYNA Users Conference, Detroit, 2002.
[3] European Standard EN-1317 Test Vehicle Models, CM/E Group -
Politecnico di Milano, Italy
[4] TP 159 Guiding walls. Technical specifications, classification,
requirements and application. (In Czech: TP 159 Vod├¡c├¡ st─øny.
Technické podm├¡nky, roztř├¡d─øn├¡ vod├¡c├¡ch st─øn, požadavky na vod├¡c├¡
st─øny, použit├¡), august 2003
[5] H. Miller, "A note on reflector arrays (Periodical styleÔÇöAccepted for
publication)," IEEE Trans. Antennas Propagat., to be published.
[6] P. Hradil, V. Salajka, P. Vymlátil, Assessment of the stability of the
mobile antinoise wall. (In Czech: Posouzen├¡ stability systému mobiln├¡
protihlukové st─øny), Technical report, 2009.
[7] P. Hradil, J. Kala, V. Salajka, P. Vymlátil The application of concrete
nonlinear model exposed to impact load, Recent Researches in
Automatic Control - 13th WSEAS International Conference on
Automatic Control, Modelling and Simulation, ACMOS'11, 2011,
Lanzarote, Spain, Pages 283-286, ISBN: 978-161804004-6.
[8] J. Kala, Z. Kala, J. Melcher, M. Škaloud, Large-deflection-theory
analysis of the effect of web initial curvature on the ultimate strength of
steel plate girder, Proceedings of the 12th International Conference on
Civil, 2009, 10p, Funchal, Madeira, ISBN: 978-190508830-0
[9] V. Salajka, P. Hradil Test of steel lock of concrete crash barrier height
1.15 m. (In Czech Zkou┼íka ocelového z├ímku oboustranného betonového
svodidla vÛšky 1.15 m), January 2002.
[10] ─îSN EN 1317 - Road restraint systems
[11] J. Králik, J.Králik jr. Seismic Analysis of Reinforced Concrete Frame-
Wall Systems Considering Ductility Effects in Accordance to Eurocode.
Engineering Structures. Elsevier 2009, ISSN 0141-0296, Vol.31, Issue
12, pp. 2865 - 2872, December 2009.