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Appl. Sci. 2017, 7(2), 202; doi:10.3390/app7020202

Numerical Study on the Asphalt Concrete Structure for Blast and Impact Load Using the Karagozian and Case Concrete Model

1,2
,
1,* , 1
and
3
1
The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China
2
School of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai 201620, China
3
School of Civil Engineering and Built Environment, Queensland University of Technology, Brisbane 4001, Australia
*
Author to whom correspondence should be addressed.
Received: 23 November 2016 / Accepted: 14 February 2017 / Published: 17 February 2017
(This article belongs to the Special Issue Advanced Asphalt Materials and Paving Technologies)
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Abstract

The behaviour of an asphalt concrete structure subjected to severe loading, such as blast and impact loadings, is becoming critical for safety and anti-terrorist reasons. With the development of high-speed computational capabilities, it is possible to carry out the numerical simulation of an asphalt concrete structure subjected to blast or impact loading. In the simulation, the constitutive model plays a key role as the model defines the essential physical mechanisms of the material under different stress and loading conditions. In this paper, the key features of the Karagozian and Case concrete model (KCC) adopted in LSDYNA are evaluated and discussed. The formulations of the strength surfaces and the damage factor in the KCC model are verified. Both static and dynamic tests are used to determine the parameters of asphalt concrete in the KCC model. The modified damage factor is proposed to represent the higher failure strain that can improve the simulation of the behaviour of AC material. Furthermore, a series test of the asphalt concrete structure subjected to blast and impact loadings is conducted and simulated by using the KCC model. The simulation results are then compared with those from both field and laboratory tests. The results show that the use of the KCC model to simulate asphalt concrete structures can reproduce similar results as the field and laboratory test. View Full-Text
Keywords: asphalt concrete; constitutive model; impact loading; blast loading; numerical simulation asphalt concrete; constitutive model; impact loading; blast loading; numerical simulation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wu, J.; Li, L.; Du, X.; Liu, X. Numerical Study on the Asphalt Concrete Structure for Blast and Impact Load Using the Karagozian and Case Concrete Model. Appl. Sci. 2017, 7, 202.

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