Research on uniaxial compressive behavior of high‐strength spiral stirrups confined circular ultra‐high performance concrete columns

Li, Jiayue; Deng, Zongquan; Yao, Junsuo

doi:10.1002/suco.202000194

Cited by 14 publications

(2 citation statements)

References 19 publications

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“…Recently, many experimental and numerical studies have been devoted to high‐performance materials, such as UHPC, ECC, and other high‐strength steel materials. Li et al 11 studied the uniaxial compressive behavior and constitutive relationship of high‐strength spiral stirrups confined in circular ultra‐high‐performance concrete (UHPC) columns. The test results indicated that transverse reinforcement can effectively improve the deformation capacity of the UHPC columns, and all confined UHPC columns showed ductile failure.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on seismic behavior of T‐shaped steel fiber reinforced concrete columns

Sun

2022

Structural Concrete

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Six T-shaped columns in which steel fiber concrete is integrated with a high-strength stirrup (SFRC) and two control specimens are tested under a cyclic lateral load and constant axial load. The effectiveness of the steel fiber concrete and high-strength stirrup to enhance its ductility and earthquake resistance is described at high-and low-axial compression ratios. The failure patterns, hysteresis response, backbone curves, ductility, and strain behavior analysis of the columns are studied systematically in the test. The effects of the stirrup strength, stirrup spacing, steel fiber content, and axial load ratio were investigated. The test results demonstrated that all specimens exhibited flexural failure. Steel fibers could prevent the cracked concrete from spalling. Specimens with high-strength stirrups, close stirrup spacing, and steel fiber exhibited a higher lateral bearing capacity, energy dissipation capacity, initial stiffness, and displacement ductility. A new strength model for predicting the lateral ultimate capacity of T-shaped concrete columns strengthened with SFRC subjected to cyclic loading is proposed. The calculated results agree well with the test results. Eight T-shaped column specimens were simulated using ABAQUS finite element analysis software. A comparison of the results of the numerical study with the experimental results demonstrates that the finite element model can accurately predict the structural behavior.

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Section: Introductionmentioning

confidence: 99%

Experimental study on seismic behavior of T‐shaped steel fiber reinforced concrete columns

Sun

2022

Structural Concrete

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“…Recent studies using confined concrete constitutive models have focused more on ultra-high performance concrete (UHPC) cases (Chang et al, 2020;Li et al, 2020). By contrast, stress-strain curves for lightweight concrete using recycled plastic aggregate have been studied only on a limited scale in the laboratory.…”

Section: Introductionmentioning

confidence: 99%

Stress and Strain Behavior of Confined Lightweight Concrete using Sand Coated Polypropylene Coarse Aggregate

Purnomo¹,

Baskoro²,

Muslim³

2021

IJTech

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Plastic waste greatly contributes to environmental pollution; therefore, using plastic waste in various applications, such as in concrete, is an important waste reduction strategy which could be contributed by the construction industry. This study presents the development of a concrete stress and strain model under compression for confined concrete specimens using polypropylene plastic as a substitution for coarse aggregate. Various short-column specimens were analyzed for stress and strain characteristics, effect of steel confinement, and compressive performance. Steel confinement increased the compressive strength and ductility of the section. The parametric identification of a stress-strain model defined for normal concrete was used in the experimental results to obtain new parameter values for the confinement coefficients k1 that are suitable for cylindrical and square lightweight concrete sections. The stress-strain diagrams for lightweight concrete of experimental cylinder and square column specimens, compared with the stress-strain modeled by the modified coefficients, indicate a fairly close agreement.

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Compressive behavior of RC members with rectangular continuous transverse reinforcement

Zakerinejad

Soltani

2021

Structural Concrete

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Rectangular Continuous Transverse Reinforcement (RCTR), as a replacement for conventional ties, is a relatively new form of reinforcement that can accelerate and facilitate the construction of reinforcement for RC members. In this study, the compressive behavior of concrete members with this kind of reinforcement is experimentally and theoretically investigated. Twenty-eight RC short column specimens with multiple arrangements for bar size and spacing of transverse reinforcement; including RCTR and conventional ties are examined under monotonic and half-cyclic loadings. The results imply that RCTR is a valid substitute for traditional ties and to a certain extent can improve the compressive strength of RC members. Based on Elasto-Plastic and Fracture (EPF) concrete model, a theoretical method is proposed in order to predict the behavior of such members, which conforms well with the experimental results.Furthermore, the validity of existing design provisions in the compressive design of these members is investigated.confinement, elasto-plastic and fracture model, rectangular continuous transverse reinforcement, reinforced concrete member

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Research on uniaxial compressive behavior of high‐strength spiral stirrups confined circular ultra‐high performance concrete columns

Cited by 14 publications

References 19 publications

Experimental study on seismic behavior of T‐shaped steel fiber reinforced concrete columns

Experimental study on seismic behavior of T‐shaped steel fiber reinforced concrete columns

Stress and Strain Behavior of Confined Lightweight Concrete using Sand Coated Polypropylene Coarse Aggregate

Compressive behavior of RC members with rectangular continuous transverse reinforcement

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