Structural Engineering and Mechanics

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Tests on explosion-resisting properties of high-performance equal-sized-aggregate concrete composite sandwich plates

  • Yizhong Tan (State Key Laboratory of Explosion Shock Prevention and Mitigation, National Defense Engineering College, Army Engineering University) ;
  • Songlin Yue (State Key Laboratory of Explosion Shock Prevention and Mitigation, National Defense Engineering College, Army Engineering University) ;
  • Gan Li (State Key Laboratory of Explosion Shock Prevention and Mitigation, National Defense Engineering College, Army Engineering University) ;
  • Chao Li (State Key Laboratory of Explosion Shock Prevention and Mitigation, National Defense Engineering College, Army Engineering University) ;
  • Yihao Cheng (State Key Laboratory of Explosion Shock Prevention and Mitigation, National Defense Engineering College, Army Engineering University) ;
  • Wei Dai (School of Science, Nanjing University of Science & Technology) ;
  • Bo Zhang (Training Base, Army Engineering University)
  • Received : 2022.10.26
  • Accepted : 2023.07.05
  • Published : 2023.08.25
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Abstract

Targeted introduction of explosion-resisting and energy-absorbing materials and optimization of explosion-resisting composite structural styles in underground engineering are the most important measures for modern engineering protection. They could also improve the survivability of underground engineering in wartime. In order to test explosion-resisting and energy-absorbing effects of high-performance equal-sized-aggregate (HPESA) concrete, the explosive loading tests were conducted on HPESA concrete composite plates by field simple explosion craters. Time-history curves of the explosion pressure at the interfaces were obtained under six conditions with different explosion ranges and different thicknesses of the HPESA concrete plate. Test results show that under the same explosion range, composite plate structures with different thicknesses of the HPESA concrete plate differ significantly in terms of the wave-absorbing ability. Under the three thicknesses in the tests, the wave-absorbing ability is enhanced with the growing thickness and the maximum pressure attenuation index reaches 83.4%. The energy attenuation coefficient of the HPESA concrete plate under different conditions was regressively fitted. The natural logarithm relations between the interlayer plate thickness and the energy attenuation coefficient under the two explosion ranges were attained.

Keywords

Acknowledgement

We thank the Chinese National Natural Science Foundation (Grant No. 52008391, 12002385, 11972045), the Jiangsu Province Natural Science Foundation (Grant No. BK 20211229, BK20190570), the Postdoctoral Research Fund for Jiangsu Planned Projects (Grant No.2018K047A) and the China Postdoctoral Science Foundation Fund (Grant No. 2018M643854) for their financial support.

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