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Advances in Civil Engineering - Volume 2016 2016, Article ID 7540151, 13 pages -

Research Article

School of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai 201620, China

The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China

Received 24 March 2016; Revised 10 May 2016; Accepted 23 May 2016

Academic Editor: Chiara Bedon

Copyright © 2016 Guo Hu et al. 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.

Abstract

The formulations of the advanced concrete RHT model adopted in AUTODYN are investigated and numerical studies are conducted to study the RHT model’s actual performances under various loading conditions. It is found that using of default values in the RHT model is not able to simulate the realistic behavior of concrete under various loading conditions. Thus modified parameters in the RHT model are proposed to better capture the realistic behavior of concrete under such loading conditions. Furthermore, numerical simulation of normal concrete slabs and multilayer concrete slabs subjected to blast loading is conducted using AUTODYN with both the default and modified RHT parameters. Experimental readings from field blast tests are used to validate the numerical model developed. It is shown that the results from numerical simulations using the modified RHT parameters and the measurements from the field blast test agree well in terms of damage pattern, crater diameter, and acceleration. Hence, it can be concluded that the RHT model with modified parameters can capture the mechanical behavior of concrete structures well. The validated model can be further used to conduct a parametric study on the influence of key parameters i.e., compressive strength, fracture energy, and thickness on blast resistance of concrete structure.





Autor: Guo Hu, Jun Wu, and Liang Li

Fuente: https://www.hindawi.com/



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