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Research Papers

Numerical Simulation on Concrete Median Barrier for Reducing Concrete Fragment Under Harsh Impact Loading of a 25-ton Truck

[+] Author and Article Information
Jaeha Lee

Department of Civil Engineering,
Korea Maritime and Ocean University,
Busan 49112, South Korea
e-mail: jaeha@kmou.ac.kr

Goangseup Zi

Professor
Department of Civil, Environmental and
Architectural Engineering,
Korea University,
Seoul 02841, South Korea
e-mail: g-zi@korea.ac.kr

Ilkeun Lee

Construction and Environment Research Group,
Expressway and Transportation
Research Institute,
Hwaseong-si 20896, Gyeonggi-do, South Korea
e-mail: ilk@ex.co.kr

Yoseok Jeong

Department of Civil Engineering,
Chungnam National University,
Daejeon 34134, South Korea
e-mail: yosoksi@gmail.com

Kyeongjin Kim

Department of Civil and
Environmental Engineering,
Korea Maritime and Ocean University,
Busan 49112, South Korea
e-mail: kkj4159@naver.com

WooSeok Kim

Department of Civil Engineering,
Chungnam National University,
Daejeon 34134, South Korea
e-mail: wooseok@cnu.ac.kr

1Corresponding author.

Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received May 31, 2016; final manuscript received January 4, 2017; published online February 9, 2017. Assoc. Editor: Taehyo Park.

J. Eng. Mater. Technol 139(2), 021015 (Feb 09, 2017) (9 pages) Paper No: MATS-16-1161; doi: 10.1115/1.4035766 History: Received May 31, 2016; Revised January 04, 2017

Recently, there was a collision accident involving vehicle–concrete median barrier in South Korea, and unfortunately, passengers on the opposite direction road were killed by the flying broken pieces of concrete generated by the collision. Primarily after this accident, we felt the need for developing an improved concrete median barrier up to level of SB6 impact severity in order to minimize the amount of broken pieces of concrete and any possibility of traffic accident casualty under the impact loading of truck. Accordingly, in this study, several designs of concrete median barriers have been examined, and a preliminary study has been conducted for developing and verifying appropriate collision model. First, type of vehicle was selected based on impact analysis on rigid wall. Then, the effects of element size and other key parameters on the capacity of the concrete median barrier under impact were studied. It was found that the key parameters for controlling behaviors of the median barrier under impact loading were contact option, threshold value, and mesh and boundary conditions. Furthermore, as a parametric study, effect of geometry and amount of wire-mesh or steel rebar in concrete median barrier on impact resistances of median barrier for reducing the collision debris were investigated. The amount of volume loss after the collision of truck was compared for various reinforcement ratios.

Copyright © 2017 by ASME
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References

Figures

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Fig. 1

Photos from a severe accident occurred in South Korea

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Fig. 2

Level of impact severity under impact of large vehicle (truck) in the EU, Japan, U.S., and Korea

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Fig. 3

Rigid wall impact analysis with selected two models

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Fig. 4

Selected truck and developed concrete median barrier model

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Fig. 5

Flowchart for developing concrete median barrier model

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Fig. 6

Six sensitivity of contact option and comparison with Olson model

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Fig. 7

Sensitivity of boundary condition at both ends

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Fig. 8

Damaged shapes after impact depending on various erode values: (a) 1.1, (b) 1.4, (c) 1.6, and (d) 1.8

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Fig. 9

Effect of softening function at various D values

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Fig. 10

Effect of softening function at various B values

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Fig. 11

Mesh sensitivity for different element sizes

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Fig. 12

Level of impact severity under impact of large vehicle (truck) in the EU, Japan, U.S., and Korea

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Fig. 13

Comparison of damaged shapes from (a) actual accident and (b) simulated results

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Fig. 14

Comparison of damaged shapes for various reinforcement designs

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Fig. 15

Comparison of volume loss

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