Experimental investigation on the cyclic behaviors of ultra-high-performance steel fiber reinforced concrete filled thin-walled steel tubular columns

Xu, Shenchun; Wu, Chengqing; Liu, Zhongxian; Shao, Ruizhe

doi:10.1016/j.tws.2019.03.008

Cited by 48 publications

(10 citation statements)

References 26 publications

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“…3 Cyclic behavior of ultra-high performance steel fiber reinforced concrete filled thin-walled steel tubular columns is also much better than that of normal strength concrete filled thin-walled steel tubular columns. 4 Ultrahigh-performance concrete has properties influenced by constituents existing at different length scales, requires the combination of different modeling strategies to capture and understand its effective property. 5 When cement is partially replaced by steel slag in ultra-high performance concrete mixes, the early age hydration is retarded, leading to reduction in the compressive strength.…”

Section: Introductionmentioning

confidence: 99%

Retracted: Parameters ranking based on influence on dynamical strength of ultra‐high performance concrete by neuro fuzzy logic

2019

Structural Concrete

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The main goal of the study was to investigate the most influential parameters for dynamic strength and modulus of elasticity of ultra-high performance concrete. For such an investigation, different parameters were analyzed. Temperature, static strength gas pressure, and projectile velocity were considered in the study. Temperature was used since the fire is a big risk to buildings and structures and therefore there is great treat to human lives. Different temperature ranges were investigated in order to analyze dynamic responses of the ultrahigh performance concrete. Based on experimental procedure input and output data pairs were collected. Adaptive neuro fuzzy inference system or ANFIS was implemented in order to establish relationships between the input and output parameters. Based on ANFIS prediction errors one can determine which input parameter has the most impact on the analyzed output. It was found that the combination of temperature and projectile velocity has the strongest relation to the dynamic strength and modulus of elasticity of the concrete structure.

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Section: Introductionmentioning

confidence: 99%

Retracted: Parameters ranking based on influence on dynamical strength of ultra‐high performance concrete by neuro fuzzy logic

2019

Structural Concrete

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“…Le Hoang et al (2019) concluded that the use of steel fibers in UHPC might be unnecessary when sufficiently thick steel tubes are used. Xu et al (2019) experimentally demonstrated that the behavior of HSC-FST columns under displacement reversals was significantly enhanced by replacing HSC with UHPC. The presence of steel fibers effectively improved stiffness retention and prevented premature local buckling of the steel tube, thereby enhancing the residual axial bearing capacity.…”

Section: Uhpc-filled Steel Tubular Columnsmentioning

confidence: 99%

A Review of Developments and Challenges for UHPC in Structural Engineering: Behavior, Analysis, and Design

2021

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The number of studies on ultrahigh-performance concrete (UHPC) or ultrahigh-performance fiber-reinforced concrete (UHP-FRC) for more resilient and sustainable reinforced concrete (RC) structures has rapidly increased in recent years due to the superior mechanical and durability properties of UHPC. The application of UHPC as a replacement for conventional concrete materials in various RC elements necessitates a thorough understanding of the structural behavior of the reinforced UHPC (R/UHPC) components under various types of loadings. This paper presents a systematic review of the state-of-the-art developments in R/UHPC elements. It addresses various topics including beams, columns, beam-column joints, shear walls, bridges, structural retrofitting, and applications such as seismic and impact. Due to the ultrahigh tensile, compressive, and bond strengths, unique strain-hardening behavior, and ductility of UHPC, R/UHPC structures may exhibit substantially different behavior than conventional RC structures at both the component and system levels. This implies that particular attention must be paid when design and analysis approaches for conventional RC elements are applied to R/UHPC elements, and suggests that developing new design philosophies is warranted to take advantage of UHPC's unique mechanical properties. The present paper summarizes the developments in analysis and design approaches for R/UHPC elements under axial forces, shear forces, and bending moments, and highlights the advantages and limitations of these approaches. Important design considerations for effectively utilizing UHPC in structural elements are also suggested. In addition to normal-strength steel reinforcing bars, the potential for reinforcing UHPC with high-strength steel bars, fiber-reinforced polymer components, and structural steel shapes is discussed based on the results of pioneering studies. Finally, this paper identifies challenges and suggests future directions for research on UHPC in structural engineering.

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“…In fact, the use of concrete with CFS is considered one of the most important ways of strengthening in thin walled structures. For example, Xu et al [8] performed an experimental investigation on the cyclic behaviors of ultra-high-performance steel fiber reinforced concrete filled thin-walled steel tubular columns. The results showed that the cyclic behavior of UHPSFRC filled thin-walled steel tubular columns was improved comparing to NSC and HSC filled thin walled steel tubular columns.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of ultra‐lightweight concrete encased cold‐formed steel structures

Eid¹,

Joó²

2021

ce papers

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The use of thin‐walled structures has been increasingly spread in the last few decades due to their big advantages in both structural design and construction methods. Therefore, the recent researches have discussed a wide range of thin‐walled structures applications. However, the resistance of such structures will be decreased by buckling effect; hence, different ways of strengthening methods have been investigated. One of this method is the use of lightweight concrete as a filling of thin‐walled members. Previous experimental research at the Department of Structural Engineering at Budapest University of Technology and Economics, was carried out to investigate the axial behavior of polystyrene aggregate concrete (PAC) braced CFS elements [1]. The effect of PAC has led to increase the load‐bearing capacity and to restrain the global and distortional buckling modes of steel elements. The results revealed that the ultimate load was increased by 37‐94%. A simplified nonlinear finite element model was developed in ANSYS software to be able to predict the peak resistance of PAC filled thin‐walled members. GMNI analyses were carried out to validate the numerical model by the experimental tests. The concrete was modelled by using springs with adequate stiffness, where a parametric study was conducted to determine the proper imperfection amplitudes of different element lengths. The numerical model showed good agreement with test results.

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Experimental investigation on the cyclic behaviors of ultra-high-performance steel fiber reinforced concrete filled thin-walled steel tubular columns

Cited by 48 publications

References 26 publications

Retracted: Parameters ranking based on influence on dynamical strength of ultra‐high performance concrete by neuro fuzzy logic

Retracted: Parameters ranking based on influence on dynamical strength of ultra‐high performance concrete by neuro fuzzy logic

A Review of Developments and Challenges for UHPC in Structural Engineering: Behavior, Analysis, and Design

Numerical simulation of ultra‐lightweight concrete encased cold‐formed steel structures

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