Flexural and longitudinal shear performance of precast lightweight steel–ultra-high performance concrete composite beam

Mo, Ze; Qiu, Jiangrui; Xu, Hanbin; Xu, Lei; Hu, Yuqing

doi:10.1007/s11709-023-0941-6

Cited by 2 publications

(3 citation statements)

References 31 publications

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“…The reason for this is that the yield strength of the steel tube in the experimental model experiences strain hardening when loaded up to 200 kN. This is consistent with the description in references [34][35][36].…”

Section: Loading Methods Of the Experimental Modelsupporting

confidence: 88%

“…When the load was 150 kN, the maximum strain value at Z-41 was 918.4 με, and the respective stress was 203.4 MPa, i.e., the bracing model was on the verge of yielding. During the loading process, the strain distribution of the upper and lower measurement points was basically symmetrical along the neutral plane of the model, which is consistent with the description in reference [34]. The maxi- The slope of the curves increased significantly after exceeding 150 kN.…”

Section: Variation Of Strains With the Load In The Experimental Modelsupporting

confidence: 88%

“…Additionally, the system exhibited two typical failure modes, i.e., local yielding of the steel tube at the loading point and cracking of the two end supports. The failure mode was also mentioned in references [34,40] Therefore, the weak point of the prefabricated H-CFST interior bracing system was not at the connection between the two H-CFST components. The self-designed hoop effectively mitigated or eliminated the strength and stiffness reduction phenomenon at the joints of the entire bracing system.…”

Section: Failure Mode Of the Experimental Modelmentioning

confidence: 98%

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Performance of Prefabricated Hollow Concrete-Filled Steel Tube Bracings on Transverse Bending: Experimental and Numerical Analyses

Dong,

Peng,

Wang

et al. 2023

JMSE

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Due to the complex hydrogeological conditions in coastal regions, the use of internal bracing systems is necessary for supporting coastal foundation pits. This paper introduces a novel prefabricated foundation pit bracing system based on Hollow Concrete-Filled Steel Tube (H-CFST) structures that can be reused, offering significant economic and societal benefits. However, there is a severe lack of research on the application of H-CFST bracing systems. Through model tests and finite element simulations, the load-displacement characteristics and failure modes of prefabricated H-CFST bracing under transverse bending were investigated. The study revealed that when a wall thickness of 1.5 d was chosen, the self-designed hoop effectively mitigated strength and stiffness reduction at the bracing connection point. When the load reached 150 kN, the outer steel tube of the H-CFST components experienced localized yielding, and when the load was increased to 300 kN, the end supports exhibited cracking. Finite element analysis provided a more accurate prediction of bracing failure at 147.18 kN, and it offered valuable insights for optimizing the bracing design. Based on the above research, theoretical methods for calculating the bearing capacity of each bracing component under transverse bending conditions have been proposed and validated against experimental results.

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Section: Loading Methods Of the Experimental Modelsupporting

confidence: 88%

Section: Variation Of Strains With the Load In The Experimental Modelsupporting

confidence: 88%

Section: Failure Mode Of the Experimental Modelmentioning

confidence: 98%

See 1 more Smart Citation

Performance of Prefabricated Hollow Concrete-Filled Steel Tube Bracings on Transverse Bending: Experimental and Numerical Analyses

Dong,

Peng,

Wang

et al. 2023

JMSE

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A Review on Mechanism and Influencing Factors of Shear Performance of UHPC Beams

Jin,

Yang,

Peng

et al. 2024

Buildings

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Ultra-High-Performance Concrete (UHPC) is increasingly used in various engineering projects due to its exceptional mechanical properties. This work conducts a literature review of research on the shear performance of UHPC beams in recent decades, with a focus on summarizing the formulas for calculating shear capacity and the main factors influencing shear performance. Firstly, this work reviews the calculation methods for the shear capacity of UHPC beams in different countries, along with their respective advantages and limitations. Subsequently, it provides a detailed analysis of various factors influencing the shear performance of UHPC beams, including longitudinal and stirrup reinforcement, steel fiber content, aggregates, admixtures, the shear-span ratio, shear keys, bolts, shear-reinforcement techniques, and environmental impacts. Through horizontal comparisons, the performance of UHPC beams and ordinary concrete beams under similar experimental conditions is examined to reveal the optimal shear working conditions for UHPC beams. Additionally, it is found that UHPC performs exceptionally well in composite beams, being compatible with numerous materials and significantly enhancing the shear strength of these beams. Lastly, the paper proposes suggestions for maximizing the shear performance of UHPC beams within a safe and reliable operating range and outlines future research directions.

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Flexural and longitudinal shear performance of precast lightweight steel–ultra-high performance concrete composite beam

Cited by 2 publications

References 31 publications

Performance of Prefabricated Hollow Concrete-Filled Steel Tube Bracings on Transverse Bending: Experimental and Numerical Analyses

Performance of Prefabricated Hollow Concrete-Filled Steel Tube Bracings on Transverse Bending: Experimental and Numerical Analyses

A Review on Mechanism and Influencing Factors of Shear Performance of UHPC Beams

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