Residual axial capacity of concrete-filled double-skin steel tube columns under close-in blast loading

Li, Minghong; Xia, Mengtao; Zong, Zhouhong; Wu, Gang; Zhang, Xihong

doi:10.1016/j.jcsr.2022.107697

Cited by 7 publications

(2 citation statements)

References 28 publications

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“…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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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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“…Finally, a predictive formula, derived through regression analysis, incorporates the influence of impact times and various design parameters to estimate the residual axial compression resistance. Li et al [16] conducted a numerical simulation study on the residual axial capacity of concrete-filled double-skin steel tube (CFDST) columns under close-in blast loads. The effectiveness of the finite element model was ensured by comprehensive comparisons with experimental results.…”

Section: Introductionmentioning

confidence: 99%

Residual Flexural Performance of Double-Layer Steel–RLHDC Composite Panels after Impact

Huang,

Zhao,

Guo

et al. 2023

Buildings

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The mechanical behavior of steel–concrete–steel (SCS) sandwich composite structures under low- or high-velocity impact loading has garnered increasing attention from researchers in recent decades. However, to date, limited effort has been dedicated to studying the residual resistance of SCS sandwich composite structures following impact damage. In a previous investigation, the authors developed a rubberized lightweight high-ductility cement composite (RLHDC) for implementation in double-layer steel–RLHDC–steel composite panels and examined the dynamic response of these panels under impact. To further explore the residual performance of impact-damaged composite panels, the present study conducts flexural tests on nine such panels. The study quantifies and analyzes the effects of various connector types, connector spacing, number of concrete layers, rubber powder content, and number of impacts on the residual flexural resistance of the impact-damaged composite panels. Detailed analysis is conducted on the failure modes, load–displacement curves, strain curves, and load–slip curves of the impact-damaged specimens. The test results reveal that the impact-damaged composite panels experience flexural failure with bond slip under static load. The residual flexural performance is found to be sensitive to the number of concrete layers and number of impacts. Finite element (FE) simulations are performed using LS-DYNA to investigate the residual flexural behavior of the impact-damaged composite panels. The restart method is employed in the simulations to mimic the post-impact static loading scenario. The agreement between the FE results and the experimental findings validates the model and provides a straightforward and effective approach for studying the residual performance of composite structures. An expanded parameter analysis leveraging the calibrated FE model indicates that the steel plate’s thickness and strength predominantly influence the composite panel’s residual resistance, whereas the influence from concrete strength proves less consequential.

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Study on damage characteristics and mechanisms of arch concrete slabs with outer arch side facing water under inner-arch contact explosion

Zhao,

Yang,

Jia

et al. 2024

International Journal of Impact Engineering

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Residual axial capacity of concrete-filled double-skin steel tube columns under close-in blast loading

Cited by 7 publications

References 28 publications

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

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

Residual Flexural Performance of Double-Layer Steel–RLHDC Composite Panels after Impact

Study on damage characteristics and mechanisms of arch concrete slabs with outer arch side facing water under inner-arch contact explosion

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