Numerical study on effect of constant and variable axial loads on RC column subjected to blast load

Abebe, Solomon; Getachew, Solomon

doi:10.1016/j.heliyon.2022.e11681

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…A thorough study of the blast resistance of columns can better guide the design and construction of buildings [13,14]. For RC columns, traditional research mainly involves changing factors, such as strength of reinforcement [15], reinforcement ratio [16][17][18], stirrup spacing [17,19], strength of concrete [20], size and shape of columns [21,22], slenderness ratio of columns [23], scale distance [24], blast location [25], and axial compression ratio [26,27] to determine the failure mode and morphology of RC columns under blast loads. P-I curve [28][29][30], residual bearing capacity [31,32], displacement [33], and support angle [34] are indicators used to evaluate the damage level of RC columns.…”

Section: Introductionmentioning

confidence: 99%

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

Xie

2023

Sustainability

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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.

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