Performance of square concrete-filled steel tubular columns under repeated lateral impact

Gao, Shan; Xu, Youchun; Derlatka, Anna

doi:10.1016/j.engstruct.2023.115719

Cited by 39 publications

(11 citation statements)

References 45 publications

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“…In this section, the axial compression ratio n is taken as 0, 0.1, 0.2, 0.3, 0.4, and 0.5 whilst the steel tube is Q345, the concrete is C60, and the eccentricity is zero. According to the previous studies from the authors' research group [12], the cross-sectional shape for the same cross-sectional area and the shape of the drop hammer are also expected to have little effect on the lateral impact performance of CFST columns. Therefore, the size of the dropping hammer is set as 120 mm × 320 mm × 400 mm and only a square section tube is used in the model.…”

Section: Effect Of the Axial Compression Ratio On Impact Performance ...mentioning

confidence: 97%

“…The cohesive force between the steel tube and the concrete is calculated by Equation (1) from Ref. [15] as: Based on the previous studies from the authors' research group [12], the static material model of steel shows little effect on the performance of CFST columns under lateral impact load. Since normal-strength low-carbon steel is used in this study, the secondary plastic flow model by Han [17] is used as shown in Figure 2.…”

Section: Boundary Conditions and Contactsmentioning

confidence: 99%

“…Wang et al [11] found that the CFST specimens experienced an obvious local response stage before cracking. Through a numerical parametric analysis, Gao et al [12] proposed the prediction formulas for the residual resistance of square CFST columns under repeated lateral impacts. In addition, FRP composites are supposed to provide benefits for the impact resistance of CFST columns [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Compression-Bending Performance of Concrete-Filled Steel Tubular Columns under Lateral Impact

Xu,

Ding,

Hao

et al. 2023

Buildings

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In this paper, a finite element model of concrete-filled steel tubular (CFST) columns under compression and lateral impact is developed and validated against previous experiments. After analyzing the influence of axial compression on the impact performance of CFST columns, the effects of eccentricity, material strength, and steel ratio on the dynamic compression-bending performances of CFST columns subjected to lateral impact are discussed. The simulated results show that at different axial compression ratios, CFST columns show overall bending failure under lateral impact. The axial force ratio below 0.2 shows a positive effect on the impact resistance of CFST columns, otherwise the axial force would degrade the impact resistance of CFST columns. Eccentricity has a negative effect on the dynamic compression-bending performance of CFST columns. The increase in the concrete strength has little effect on the dynamic compression-bending performance of the CFST columns under lateral impact and eccentric compression. The increases in steel strength and steel ratio can improve the dynamic compression-bending performances of the CFST columns under lateral impact and eccentric compression. Even though the prediction formula for the dynamic compression-bending performance of CFST columns shows good fitness with the simulated results, it is modified to have sufficient strength reserves for design applications.

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Section: Effect Of the Axial Compression Ratio On Impact Performance ...mentioning

confidence: 97%

Section: Boundary Conditions and Contactsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamic Compression-Bending Performance of Concrete-Filled Steel Tubular Columns under Lateral Impact

Xu,

Ding,

Hao

et al. 2023

Buildings

Self Cite

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“…Furthermore, a calculation model for assessing residual strength was introduced and validated using experimental results. Guo et al [15] carried out a numerical simulation to examine the impact performance and residual capacity of square concrete-filled steel tubular (CFST) columns subjected to repeated lateral impacts. The findings elucidate that plastic deformation in CFST serves as the principal mechanism for energy dissipation.…”

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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“…Numerous experimental studies and finite element simulation analyses were conducted under the influence of different parameters, such as impact position, repeated impact, axial preloading, impact velocity, and different section types, and the corresponding impact energy absorption relationship and empirical formulas were proposed in ref. (Zeinoddini et al, 2002;Bambach et al, 2008;Al-et al, 2011;Shan et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Lateral impact response of circular hollow steel tubes with mid-span localized penetrating notches

Huang,

Wang

2023

Front. Mater.

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In this study, 32 numerical models of CHST columns were established in the ABAQUS program to evaluate the effect of mid-span local defects on the impact resistance of circular hollow steel tube (CHST) columns. The simulation studies were conducted from three aspects: notch length, notch angle, and impact energy. The results showed that under a lateral impact load, the mid-span of the CHST column presented global bending failure patterns accompanied by local indentation deformation in the impact region and local buckling deformation at the bottom of the fixed end. Compared with the mid-span indentation displacement of the non-notch model, when the impact velocities were 30 km/h and 60 km/h, the horizontal notch model surpassed the maximum by 29.3% and 36.3%, the oblique notch model surpassed the maximum by 47.8% and 115.6%, and the vertical notch model only increased by 9.7% and 1.1%. The local damage area and impact force time-history curves of the vertical notch model agreed well with those of the non-notch model. Among the three notch angles, the impact plateau values of the vertical notch model and the global bending displacement in the mid-span were least affected by the notch length, notch location, and impact energy. The energy absorption of the CHST column was mainly due to indentation deformation in the mid-span, and the global bending deformation was auxiliary. Compared with the energy absorption ratio (EAR) of the non-notch model, with increased impact energy, the EAR of the vertical notch model increased by 20.2%, 13.5%, and 17.3% on average. The horizontal and oblique notch models decreased by 28.2%, 61.0%, 42.4%, and 29.1%, 62.7%, and 49.3%, respectively. The Rd of all notch models showed an overall upward trend as the impact energy increased, and the Rd of the horizontal notch model increased the most. According to the parametric analysis results, the dynamic flexural capacity prediction formula of the CHST columns section was obtained, considering the influence of notch length, notch angle, and impact energy within the parameter range of this study.

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Performance of square concrete-filled steel tubular columns under repeated lateral impact

Cited by 39 publications

References 45 publications

Dynamic Compression-Bending Performance of Concrete-Filled Steel Tubular Columns under Lateral Impact

Dynamic Compression-Bending Performance of Concrete-Filled Steel Tubular Columns under Lateral Impact

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

Lateral impact response of circular hollow steel tubes with mid-span localized penetrating notches

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