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Sensitivity Analysis of Factors Influencing the Blast Resistance of Reinforced Concrete Columns Based on Grey Relation Degree

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  • Yangyong Wu

    (State Key Laboratory of Precision Blasting, Jianghan University, Wuhan 430056, China
    School of Safety Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China)

  • Quanmin Xie

    (State Key Laboratory of Precision Blasting, Jianghan University, Wuhan 430056, China
    Hubei Key Laboratory of Blasting Engineering, Jianghan University, Wuhan 430056, China)

  • Chaomin Mu

    (State Key Laboratory of Precision Blasting, Jianghan University, Wuhan 430056, China
    Hubei Key Laboratory of Blasting Engineering, Jianghan University, Wuhan 430056, China
    School of Safety Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China)

Abstract

Reinforced concrete (RC) column is an important load-bearing component in building structures. In order to study the blast resistance of RC columns, the numerical simulation model was verified based on the field test data, and the ANSYS/LS-DYNA 2020R2 software was used to expand the working conditions. The sensitivity analysis method of grey relation degree was used to study the effects of factors, such as the diameter of longitudinal reinforcement, number of longitudinal reinforcement, the diameter of the stirrup, stirrup spacing, strength of concrete, scale distance, and strength of reinforcement on the blast resistance of RC columns. The results show that changing the number of longitudinal reinforcements to control the reinforcement ratio can make the peak displacement of RC columns smaller rather than changing the diameter of longitudinal reinforcement. Changing the stirrup spacing to control the stirrup ratio can make the RC column have better blast resistance rather than changing the diameter of the stirrup. The strength of reinforcements and concrete materials has little effect on the mid-span peak displacement of RC columns. The grey relation degree of the influencing factors of the mid-span peak displacement of the RC column is in the order of stirrup spacing, the diameter of the stirrup, scale distance, the diameter of longitudinal reinforcement, the number of longitudinal reinforcement, and the strength of concrete. The relation between stirrup spacing and the diameter of the stirrup is larger, and the grey relation degree is 0.6914 and 0.6660, respectively. This study can provide a reference for the design and construction of RC column structures.

Suggested Citation

  • Yangyong Wu & Quanmin Xie & Chaomin Mu, 2023. "Sensitivity Analysis of Factors Influencing the Blast Resistance of Reinforced Concrete Columns Based on Grey Relation Degree," Sustainability, MDPI, vol. 15(16), pages 1-21, August.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:16:p:12285-:d:1215475
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    References listed on IDEAS

    as
    1. Xiaoqiang Zhang & Fengyuan Zhou & Jiaxing Zou, 2022. "Numerical Simulation of Gas Extraction in Coal Seam Strengthened by Static Blasting," Sustainability, MDPI, vol. 14(19), pages 1-17, September.
    2. Seonggyu Pak & Seongho Jung & Changhyun Roh & Chankyu Kang, 2019. "Case Studies for Dangerous Dust Explosions in South Korea during Recent Years," Sustainability, MDPI, vol. 11(18), pages 1-13, September.
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