Experimental study on residual mechanical properties after cyclic loading of steel-concrete composite-laminated beams

He, Hong; Liang, Xian; Shang, Junchao; Long, Yuan

doi:10.1016/j.cscm.2023.e02257

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…Researchers have conducted experiments to investigate the behavior of such composite materials under dynamic loading conditions, aiming to understand their response to cyclic loading and its implications for engineering practice. He et al [22] examined the cyclic loading test properties of composite laminated beams and found that the stiffness of the specimen, which failed in the cyclic loading test, decreased by about 30%, while the bearing capacity decreased by about 10%. Zhang et al [23] investigated the cyclic behavior of FRP-concrete-steel double-skin tubular columns under a combined loading condition of axial compression and cyclic lateral loading.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Mechanical Properties of Rock–Concrete Composite Specimens under Cyclic Loading

Li,

Zhao,

Hou

et al. 2024

Buildings

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The foundations of bridges and other tall buildings are often subjected to cyclic loads. Therefore, it is essential to investigate the mechanical properties of rock–concrete composite foundations under cyclic loads. In this paper, uniaxial cyclic loading and unloading tests were conducted on rock–concrete composite specimens using the TFD-2000 microcomputer servo-controlled rock triaxial testing machine. The stress–strain curves, elastic modulus variation, and energy dissipation were analyzed. The results showed that the stress–strain curves of composite specimens under uniaxial cyclic loading and unloading conditions formed hysteresis loops. The hysteresis loop exhibited a sparse–dense–sparse pattern under the upper stress of 27.44 MPa, which was 90% of the uniaxial strength. The elastic modulus, as well as the dissipated energy, decreased rapidly in the first few cycles and then gradually decreased at a constant rate, with the upper stress increasing to 27.44 MPa. Both the elastic modulus and the dissipated energy exhibited an accelerated stage before specimen failure. The primary failure mode of the composite specimen was split failure from concrete to sandstone. A damage variable was derived to better reflect the laws governing the damage evolution of the composite under cyclic loads.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Mechanical Properties of Rock–Concrete Composite Specimens under Cyclic Loading

Li,

Zhao,

Hou

et al. 2024

Buildings

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“…The road and bridge structures are subjected to various loads, and when the stress reaches the limit, deformation occurs, leading to fatigue failure [7][8][9][10]. UHTCC exhibits a similar fatigue failure phenomenon as ordinary concrete, albeit with differing fatigue life and characteristics [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Bending Fatigue Properties of Ultra-High Toughness Cementitious Composite (UHTCC)

Wang,

Huang,

Shen

et al. 2024

Materials

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Ultra-High Toughness Cementitious Composite (UHTCC) represents a composite material meticulously engineered on the foundation of micromechanical principles. The multi-crack cracking and strain-hardening characteristics of UHTCC enable it to be applied to orthotropic steel decks to control the crack width. Different from most studies which only focus on hybrid fiber or fatigue characteristics, this paper studies the influence of hybrid fiber content on static mechanical properties, flexural toughness, and flexural fatigue characteristics of UHTCC under different stress levels. The compressive and flexural strength, bending toughness, and fatigue damage of UHTCC under different fiber ratios were compared, and the fatigue properties of hybrid fiber UHTCC were verified. The results reveal that hybrid fiber exerts a more pronounced effect on toughness, augmenting the maximum folding ratio by 23.7%. Single-doped steel fiber UHTCC exhibits a characteristic strain-softening phenomenon attributable to inadequate fiber content, whereas the bending toughness index of hybrid fiber UHTCC surpasses that of SF1.5P0 by 18.6%. Under low-stress conditions, UHTCC demonstrates a nearly threefold increase in bending fatigue life with a mere 1% steel fiber content, while the influence of polyvinyl alcohol (PVA) fiber on fatigue life is more significant: with an increase of only 1/5 volume content, the fatigue life increased by 29.8%, reaching a maximum increase of 43.2% at 1/4 volume content. Furthermore, the fatigue damage accumulation curve of UHTCC follows a three-stage inverted S-shaped trajectory. The inclusion of PVA fiber facilitates early initiation of stable cracking during the fatigue failure process, thereby advancing the entire strain stability development stage and mitigating external load forces through the proliferation of micro-cracks. Consequently, compared to SF1P0, the ε0 of SF1P5 experiences a significant increase, reaching 143.43%.

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Experimental study on residual mechanical properties after cyclic loading of steel-concrete composite-laminated beams

Cited by 2 publications

References 8 publications

Experimental Study on the Mechanical Properties of Rock–Concrete Composite Specimens under Cyclic Loading

Experimental Study on the Mechanical Properties of Rock–Concrete Composite Specimens under Cyclic Loading

Bending Fatigue Properties of Ultra-High Toughness Cementitious Composite (UHTCC)

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