Load-carrying capacity of circular recycled aggregate concrete-filled steel tubular stub columns under axial compression: Reliability analysis and design factor calibration

Chen, Wenguang; Xu, Jinjun; Li, Zhipeng; Huang, Xinliang; Wu, Yuntian

doi:10.1016/j.jobe.2023.105935

Cited by 12 publications

(4 citation statements)

References 60 publications

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“…The modeling of the structural steel material for the steel members follows the constitutive relationship provided in the Eurocode [21] and used in previous research [22,23], which is indicated by Equation ( 23) and Figure 6.…”

Section: Structural Steel Modelingmentioning

confidence: 99%

Seismic Design and Performance Evaluation of Coupled Steel Plate and Reinforced Concrete Composite Walls

Liu,

Wu,

Wang

et al. 2023

Buildings

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Coupled steel plate and reinforced concrete (SPRC) composite shear walls have been widely constructed in the core tube of super tall buildings in seismic regions. However, relevant research progress is far behind the practical application of this coupled composite wall system. Particularly, the current seismic design method does not consider the coupling mechanism and lacks efficiency in the computation of seismic base shear. In this research, the energy balance-based plastic design (EBPD) method is developed and used to design twelve prototype structures considering different structural heights and coupling ratios (CR). With the ABAQUS-based numerical techniques verified by relevant experimental results, all the prototype cases were studied by pushover analysis and nonlinear dynamic analysis to examine the effectiveness of the EBPD method in ensuring satisfactory seismic performance of coupled SPRC composite walls. The results indicate that the coupled SPRC composite walls designed by the EBPD method can satisfy the code requirements on lateral deformation under moderate and rare earthquakes. The analytical average story shear and bending moment distribution patterns have acceptable agreement with the relevant design assumptions. Favorable CR ranges are suggested for the coupled SPRC composite walls with different story numbers to achieve good earthquake-induced deformation characteristics.

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Section: Structural Steel Modelingmentioning

confidence: 99%

Seismic Design and Performance Evaluation of Coupled Steel Plate and Reinforced Concrete Composite Walls

Liu,

Wu,

Wang

et al. 2023

Buildings

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“…However, compared with ordinary concrete, recycled aggregate concrete possesses certain flaws, such as low strength and a significant degree of water absorption [ 7 , 8 , 9 ]. With respect to this, steel tubes inhibit the generation and development of vertical cracks in concrete, thus the restraining quality of steel tubes can also improve the compressive strength and deformation ability of concrete [ 10 , 11 , 12 , 13 ]. The local buckling of the steel tube may be successfully avoided by the support effect of RAC deformation on the interior of the steel tube during the application of stress.…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior Analysis of Recycled Aggregate Concrete-Filled Square Steel Tube Frames

et al. 2023

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In this study, the seismic behavior of a recycled aggregate concrete-filled square steel tube (S-RACFST) frame under different design conditions was investigated. Based on previous studies, a finite element model for the seismic behavior of the S-RACFST frame was developed. Moreover, the axial compression ratio, beam–column line stiffness ratio, and yield bending moment ratio of the beam–column were regarded as the variation parameters. It was through these parameters that the seismic behavior of eight S-RACFST frame finite element specimens was discussed. The seismic behavior indexes, such as the hysteretic curve, ductility coefficient, energy dissipation coefficient, and stiffness degradation were obtained—which, in turn, revealed the influence law and the degree of the design parameters regarding seismic behavior. Moreover, the sensitivity of the various parameters with respect to the seismic behavior of the S-RACFST frame was evaluated via grey correlation analysis. The results show that the hysteretic curves of the specimens were fusiform and full with respect to the different parameters. Firstly, with the axial compression ratio increasing from 0.2 to 0.4, the ductility coefficient increased by 28.5%. In addition, the equivalent viscous damping coefficient of the specimen with the axial compression ratio of 0.4 was 17.9% higher than that of the specimen with the axial compression ratio of 0.2, which was 11.5% as well as that with an axial compression ratio of 0.3. Second, when the line stiffness ratio rises from 0.31 to 0.41, the specimens’ bearing capacity and displacement ductility coefficient both get better. However, the displacement ductility coefficient gradually decreases when the line stiffness ratio is greater than 0.41. As a result, an optimal line stiffness ratio (0.41) thus exhibits good energy dissipation capacity. Thirdly, with the increase in the yield bending moment ratio from 0.10 to 0.31, the bearing capacity of the specimens improves. In addition, the positive and negative peak loads increased by 16.4% and 22.8%, respectively. Moreover, the ductility coefficients were all close to three, thus demonstrating good seismic behavior. The stiffness curve of the specimen with a large yield bending moment ratio with respect to the beam–column, is higher than those that possess a small beam–column yield moment ratio. In addition, the yield bending moment ratio of the beam–column possesses a significant influence on the seismic behavior of the S-RACFST frame. Furthermore, the yield bending moment ratio of the beam–column should be considered first in order to ensure the seismic behavior of the S-RACFST frame.

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“…Numerous examples can be found in the literature that support this observation. For instance, some authors have noted the deterioration of both properties following the addition of recycled concrete aggregate, due to its greater flexibility and poorer adhesion to the cementitious matrix [1,11,21]. Conversely, there is a common improvement in both properties thanks to the use of electric arc furnace slag, primarily due to its high hardness and strong bond to the matrix [6,22].…”

Section: Introductionmentioning

confidence: 99%

Analyzing the Relationship between Compressive Strength and Modulus of Elasticity in Concrete with Ladle Furnace Slag

Revilla-Cuesta,

Serrano-López,

Espinosa

et al. 2023

Buildings

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The addition of Ladle Furnace Slag (LFS) to concrete modifies its compressive strength and modulus of elasticity and consequently impacts their relationship. This research evaluated both properties at 28, 90, and 180 days in concrete mixes produced with 5%, 10%, and 20% of two LFS types, both stabilized and non-stabilized. The relationship between them was then analyzed through these experimental results by adopting a statistical approach. A three-way analysis of variance revealed that both properties were affected by LFS differently. Thus, the effect of each LFS content on both features varied depending on its composition and pre-treatment. Furthermore, the effect of the LFS content on the compressive strength was also influenced by the age of the concrete. These facets implied that when analyzing the relationship between both mechanical properties, the monotonic correlations were stronger than the linear ones, reaching values between 0.90 and 1.00. Therefore, the double reciprocal regression models were the most precise ones for expressing the modulus of elasticity as a function of compressive strength. The model accuracy was further enhanced when discriminating based on the LFS type and introducing concrete age as a predictive variable. With all these considerations, the average deviations between the estimated and experimental values of 1–3% and the maximum deviations of 4–7% were reached, as well as R2 coefficients of up to 97%. These aspects are central to the further development of LFS concrete models.

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Load-carrying capacity of circular recycled aggregate concrete-filled steel tubular stub columns under axial compression: Reliability analysis and design factor calibration

Cited by 12 publications

References 60 publications

Seismic Design and Performance Evaluation of Coupled Steel Plate and Reinforced Concrete Composite Walls

Seismic Design and Performance Evaluation of Coupled Steel Plate and Reinforced Concrete Composite Walls

Seismic Behavior Analysis of Recycled Aggregate Concrete-Filled Square Steel Tube Frames

Analyzing the Relationship between Compressive Strength and Modulus of Elasticity in Concrete with Ladle Furnace Slag

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