Effect of a new type of high-strength lightweight foamed concrete on seismic performance of cold-formed steel shear walls

Xu, Zhifeng; Chen, Zhongfan; Yang, Suhang

doi:10.1016/j.conbuildmat.2018.06.067

Cited by 46 publications

(11 citation statements)

References 28 publications

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“…Rebars were simulated as T3D2 2-node linear 3D truss elements, and their constitutive model was a bilinear follow-up hardness model. The files (.inp) on ABAQUS were compiled, spring elements were inserted in between longitudinal rebars and SAC, and the bond-slip relation was determined from Equations (7) to (12). The results of the temperature field model were imported as a predefined field into the seismic performance model.…”

Section: Element Selectionmentioning

confidence: 99%

“…Among them, linear springs were used in the Y and Z directions, and nonlinear springs were used in the X direction to simulate the bond-slip relation between rebars and NAC. The bond-slip relationship was also converted from the bond stress-slip relation, as was shown in Equation (12).…”

Section: Bond-slip Model Considering Materials Degradation Of Rebars and Nacmentioning

confidence: 99%

“…Faleschini et al, investigated the seismic performance of electric arc furnace (EAF) concrete beam-column joints whose results illustrated that EAF concrete could provide higher load-bearing capacity for beamcolumn joints on a "sustainable development" basis and that the energy dissipation capacity of EAF concrete joints was better than that of ordinary concrete joints [11]. Xu et al, compared the seismic performance of cold-formed steel (CFS) shear walls incorporating high-strength lightweight foamed concrete (HLFC) with that of ordinary cold-formed steel and found that the use of HLFC reduced the weight and bearing capacity of shear walls by 59.4% and 24.6%, respectively, which indicated that the application of HLFC in cold-formed steel shear walls significantly reduced the resultant self-weight to improve the structural seismic performance while also leading to a small decrease in structural load carrying capacity [12].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Analysis of Seismic Performances of Post-Fire Scoria Aggregate Concrete Beam-Column Joints

Cai

2021

Fire

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In order to analyze the post-fire seismic performances of scoria aggregate concrete (SAC) beam-column joints precisely and effectively, one finite element model (FEM) was developed to simulate the seismic behavior of SAC beam-column joints. The FEM consists of two sequential parts: firstly, the heat transfer analysis of the beam-column joints, and then the seismic analysis of the SAC joints by combining the temperature field distribution obtained from the heat transfer analysis with the mechanical properties of the SAC after fire, both of which were implemented in ABAQUS. In order to make the simulation results more accurate, spring elements were applied to simulate the bond–slip behavior with material degradation due to fire damage in the simulation of seismic analysis. Moreover, in order to validate the FEM, the seismic behavior of the natural aggregate concrete (NAC) beam-column joints after fire was simulated with the established FEM, and the simulation results were compared with the available test data. It is proved that the FEM we built was accurate and effective and provided efficient solutions for evaluating the seismic performance of post-fire beam-column joints so that the effects of various parameters, namely, fire time, longitudinal reinforcement ratio, and axial compression ratio on the seismic performance of SAC beam-column joints after fire were investigated in depth, which indicated the increase of axial compression ratio can improve the strength, initial stiffness, and energy dissipation capacity of SAC joints, while the increase of longitudinal reinforcement ratio can increase the strength and stiffness of SAC joints to a small extent, but too high reinforcement ratio will significantly weaken the energy dissipation capacity of SAC joints.

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Section: Element Selectionmentioning

confidence: 99%

Section: Bond-slip Model Considering Materials Degradation Of Rebars and Nacmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Analysis of Seismic Performances of Post-Fire Scoria Aggregate Concrete Beam-Column Joints

Cai

2021

Fire

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“…With the advances in building industrialization, assembled lightweight steel forming skeletons have been applied in shear wall structures due to their characteristics of high stress-efficiency, seismic energy-efficiency, and environmentally friendly protection [ 1 , 2 , 3 ]. However, Xu et al [ 4 ] observed that the bond–slip phenomenon occurred in the process of low-cycle repeated tests of lightweight steel–concrete shear walls. The concrete and lightweight steel were separated from each other and could not work together as a whole, which directly affected the mechanical performance, damage pattern, bearing capacity, and deformation of all the components.…”

Section: Introductionmentioning

confidence: 99%

Study of Bond–Slip Behavior and Constitutive Model of a New M-Section Steel-Skeleton Concrete

Wei

Yang

et al. 2022

Materials

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In this study, the bond–slip behavior between a new type of M-section steel skeleton (i.e., M-section steel) applied in assembled shear wall structures and concrete was investigated. First, push-out tests were conducted on 21 M-section steel–concrete (MSSC) specimens, wherein the effects of the concrete cover, concrete strength, and anchorage length on the bond strength between the M-section steel and concrete were considered. Further, the crack patterns, strain distribution of M-section steel, and bond–slip curves of the MSSC specimens were investigated using conventional strain measurement and a non-contact optical three-dimensional deformation measurement system, Digital Image Correlation–3D (DIC-3D). The experimental results demonstrated that the bond–slip curves of the MSSC specimens were divided into four stages: the linear ascending, non-linear ascending, non-linear descending, and residual stages. The initial average bond strength was mainly affected by the concrete strength and anchorage length, whereas the concrete cover and anchorage length influenced the residual average bond strength , and the ultimate average bond strength was affected by the concrete strength, concrete cover, and anchorage length. Consequently, a bond–slip constitutive model of M-section steel and concrete was proposed based on the experimental results, and consistency was observed in comparison with the test results, which verified the applicability of the proposed model. Furthermore, to verify the rationality of the bond–slip constitutive model, a numerical simulation was performed, wherein the bond–slip curves, stress clouds, and interfacial bond damage process of the MSSC specimens were investigated. The numerical simulation results indicated that the bond–slip constitutive model could accurately predict the entire failure process of the MSSC specimens.

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“…The use of reinforcement bars also increases the density and corrosion problems [11]. In recent, the lightweight composite wall panels, instead of conventional lightweight wall panels incorporated reinforced bars, are developed using foam concrete and cold-formed steels [12][13][14]. The flexural strength of such wall panels is significantly improved due to the composite action between cold-formed steel sections and concrete.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Prefabricated Lightweight Composite Wall Panels under Flexural Loading

Hassan¹,

Singh²,

Kumar³

2020

J. Civ. Eng. Constr.

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The prefabricated lightweight wall panels have been widely used instead of brick walls in the modern construction industry of building due to its many advantages. As lightweight concrete is week under flexural loading, more reinforcement bars are required to improve the flexural strength of conventional lightweight wall panel. In this paper, steel studs/angles are proposed instead of reinforcement bars because the moment of inertial of steel stud/angle is higher than reinforcement bars. Experimental study has been conducted to investigate the flexural behaviour of proposed prefabricated lightweight composite (PLC) wall panels. Three samples of PLC wall panels are fabricated using lightweight concrete materials and studs. The parameters that are changed in the test specimens are material types (cold-form steel or carbon steel) and numbers of steel studs/angles. The test results show that the material types and numbers of steel studs/angles has significant impact on the flexural strength and stiffness of PLC wall panels.

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Effect of a new type of high-strength lightweight foamed concrete on seismic performance of cold-formed steel shear walls

Cited by 46 publications

References 28 publications

Numerical Analysis of Seismic Performances of Post-Fire Scoria Aggregate Concrete Beam-Column Joints

Numerical Analysis of Seismic Performances of Post-Fire Scoria Aggregate Concrete Beam-Column Joints

Study of Bond–Slip Behavior and Constitutive Model of a New M-Section Steel-Skeleton Concrete

Experimental Study on Prefabricated Lightweight Composite Wall Panels under Flexural Loading

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