Evaluation of concrete barriers with novel shock absorbers subjected to impact loading

• Autorzy: Kim WooSeok , Lee Ilkeun , Kim Kyeongjin , Jeong Yoseok , Lee Jaeha

Identyfikatory

DOI

10.1016/j.acme.2019.01.004

• Języki publikacji: EN

Abstrakty

EN

Vehicle speeds have increased due to improved road condition. However, this increased speed can result in high energy collisions. Recently, a vehicle occupant in South Korea was killed by a fragment ejected from a concrete median barrier that was struck by a vehicle. The current design impact level of a concrete median barrier (CMB) is SB5-B (270 kJ). However, the impact level of the mentioned accident was estimated as over SB7 (2300 kJ). In the present work, a series of numerical analyses was conducted to reduce the fragmentations of CMB due to impact. Field test were utilized to verify the newly developed model of CMB in impact events. The wire-mesh reinforcements and increment of the cross section were considered as design modifications. In particular, a special device to absorb a significant collision energy has been developed without a dramatic increase in construction cost. This device consists of an empty space around the dowel bars which fix the barrier to the foundation. The empty space allows the dowel bars to deform to absorb collision energy. The performance of the new concrete median barrier equipped with the shock absorbing devices was verified by using carefully designed field test data.

Słowa kluczowe

EN

concrete median barrier; fragmentation; impact severity; collision; shock absorber

PL

amortyzator; kolizja; betonowa bariera drogowa

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2019
• Tom: Vol. 19, no. 3
• Strony: 657--671
• Opis fizyczny: Bibliogr. 15 poz., fot., rys., wykr.

Twórcy

autor

Kim WooSeok

• Department of Civil Engineering, Chungnam National University, 34134, South Korea

autor

Lee Ilkeun

• Structural Research Office, Korea Expressway Corporation Research Institute, 18489, South Korea

autor

Kim Kyeongjin

• Department of Civil and Environmental Engineering, Korea Maritime and Ocean University, 49112, South Korea

autor

Jeong Yoseok

• Research Institute for Construction Disaster Prevention, Chungnam National University, 34134, South Korea

autor

Lee Jaeha

• Department of Civil Engineering, Korea Maritime and Ocean University, 49112, South Korea

Bibliografia

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• [6] European Committee for Normalization, EN 1317 European Standard for Road Restraint Systems, European Committee for Normalization, 2012.
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• [9] Korea Concrete Institute, Concrete Design Code 2012, Korea Concrete Institute, South Korea, 2012.
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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020)