Study on the influence of parameters of reinforced concrete with finite thickness on fragment penetration performance

DOI:	10.11809/bqzbgcxb2023.05.026
Keywords:	reinforcement parameters; embedded depth; fragment penetration; orthogonal optimization
Abstract:	In order to study the influence of reinforcement parameters of reinforced concrete on the penetration of fragments into concrete, this paper obtains the damage law of fragment penetration into concrete under different reinforcement configurations by analyzing the failure mode, mass loss and residual velocity of fragments. The orthogonal optimization method is then used to study the penetration effect of fragments into concrete with different reinforcement configurations (spacing, reinforcement diameter and embedded depth). The results show that when the fragments do not contact the reinforcement, the parameters have little influence on the residual velocity of fragments; the influence of reinforcement spacing at this moment is the greatest by using PLS analysis method, and its regression coefficient is 0.79. When the fragments contact the concrete, however, the diameter of the reinforcement has the greatest impact on the residual velocity. The average erosion mass in the middle and at the junction reduces by 24.1% and 31.6% respectively, and the average residual velocity reduces by 83.2% and 97.1% respectively. The best anti fragment penetration parameters of reinforcement at three positions are obtained, and the research results provide a reference for the design of reinforced concrete structural parameters to prevent fragment penetration.
Issue:	Vol. 44 No. 5 (2023)
Published:	2023-05-28
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