Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
권호 표지
DOI QR코드

DOI QR Code

Experimental Study on Validation of Nose Shape Factors of Projectile in Existing Impact formulas for High-Strength Concrete

고강도콘크리트에 대한 기존 내충격 성능평가식의 비상체 선단형상계수 유효성 평가 실험 연구

  • Received : 2018.11.16
  • Accepted : 2019.02.07
  • Published : 2019.02.28
⟨ Previous Next ⟩

Abstract

This study was conducted in order to validate the nose shape factors of projectile in existing impact formulas for high-strength concrete in the event of collision with high-speed projectiles. In order to conduct the high-speed impact experiment, specified concrete strengths of 35, 100, and 120 MPa were prepared and tested in collision with both conical and hemispherical projectiles. The results showed that the measured penetration depth did not decrease linearly as concrete strength increased. Comparing the ratio penetration depth to the kinetic energy of the conical and hemispherical projectiles, the difference in the ratios for high strength concrete was observed to decline as concrete strength increased. However, in the modified NDRC and the Hughes formulas, the difference in the predicted penetration depth of the conical and hemispherical projectiles was constant despite increasing concrete strength. The modified NDRC and Hughes formulas should be improved upon so as to be applied to high strength concrete.

Keywords

Acknowledgement

Supported by : 국토교통과학기술진흥원, 한국연구재단

References

  1. Beppu, M., Miwa, K., Itoh, M., Katayama, M., & Ohno, T. (2008). Damage evaluation of concrete plates by high-velocity impact, International Journal of Impact Engineering, 35(12), 1419-1426. https://doi.org/10.1016/j.ijimpeng.2008.07.021
  2. Drdlova, M., Buchar, J., Ridky, R., & Kratky, J. (2015). Blast resistance characteristics of concrete with different types of fibre reinforcement, Structural Concrete, 16(4), 508-517. https://doi.org/10.1002/suco.201400080
  3. Haldar, A. & Hamieh, H. (1984). Local effect of solid missiles on concrete structures, ASCE Journal of Structural Engineering, 110(5), 948-960 https://doi.org/10.1061/(ASCE)0733-9445(1984)110:5(948)
  4. Joh, C., Kwark, J. W., Kwak, I. J., Kang, J., Lee, J., & Choi, E. S. (2012). Design technology of K-UHPC, Proceedings of the Korean Concrete Institute, 24(2), 863-864. (in Korean)
  5. Kennedy, R. P. (1976). A review of procedures for the analysis and design of concrete structures to resist missile impact effects, Nuclear Engineering and Design, 37, 183-203. https://doi.org/10.1016/0029-5493(76)90015-7
  6. Kim, J. H., Kim, G. Y., Kim, H. S., Yoon, M. H., Lee, B. K., & Han, S. H. (2015). Rear failure properties of fiber reinforced concrete under high-velocity projectile impact by nose shape projectile, 2015 KCI Fall Convention, 27(2), 547-548. (in Korean)
  7. Kim, S. & Kang, T.H.-K. (2016). An Apparatus for Testing Impact Resistance, Korean Patent, No. 10-16655084. (in Korean)
  8. Kim, S., Kang, T.H.-K., & Yun, H. D. (2017). Evaluation of impact resistance of steel fiber-reinforced concrete panels using design equations, ACI Structural Journal, 114(4), 911-921. https://doi.org/10.14359/51689540
  9. Koh, K. T., Ryu, G. S., Park, J. J., & Kim, S. W. (2012). Material characteristics of K-UHPC, Proceedings of the Korean Concrete Institute, 24(2), 861-862. (in Korean)
  10. Kong, X. Z., Wu, H., Fang, Q., & Peng, Y. (2017). Rigid and eroding projectile penetration into concrete targets based on an extended dynamic cavity expansion model, International Journal of Impact Engineering, Vol. 100, 13-22. https://doi.org/10.1016/j.ijimpeng.2016.10.005
  11. Korea Agency for Technology and Standards. (2010a). Concrete Compressive Strength Test Method (KS F 2405:2010, Bulltin No. 2010-0654), Korea Standards Association. (in Korean)
  12. Korea Agency for Technology and Standards. (2010b). Method of Test for Flexural Strength of Concrete (KS F 2408:2000), Korea Standards Association. (in Korean)
  13. Korea Concrete Institute. (2012). Design Code for Concrete Structures, p. 592 (in Korean).
  14. Lee, S. G., Kim, G. Y., Choi G. C., Kim, H. S., Yoon, M. H., & Lee, B. K. (2016). Impact strain behavior of concrete panel by projectile nose shape, 2016 KCI Spring Convention, 28(1), 543-544. (in Korean)
  15. Lee, S. K., Kim, G. Y., Kim, H. S., Choi, G. C., Yoon, M. H., & Son, M. J. (2016). Impact properties and numerical behavior of concrete by projectile nose shape, 2016 KCI Fall Convention, 28(2), 409-410. (in Korean)
  16. Lee, S., Kim, G., Kim, H., Son, M., Choe G., & Nam, J. (2018). Strain behavior of concrete panels subjected to different nose shapes of projectile impact, Materials, 11(3), paper No. 409.
  17. Li Q. M., & Chen, X. W. (2003). Dimensionless formulae for penetration depth of concrete target impacted by a non-deformable projectile, Internal Journal of Impact Engineering, 28, 93-116 https://doi.org/10.1016/S0734-743X(02)00037-4
  18. NDRC. (1946). Effect of Impact and Explosion, Summary Technical Report of Division 2, Vol. 1, National Defense Research Committee.
  19. Zhang, Y., Chen, W., Cheng, S., Zou, H., & Guo, Z. (2017). Penetration of rigid projectiles into concrete based on improved cavity expansion model, Structural Concrete, 18(6), 974-985. https://doi.org/10.1002/suco.201600195