Failure Criteria and Constitutive Relationship of Lightweight Aggregate Concrete under Triaxial Compression

Ye, Peihuan; Chen, Yuliang; Chen, Zongping; Xu, Jinjun; Wu, Hao

doi:10.3390/ma15020507

Cited by 4 publications

(4 citation statements)

References 33 publications

(32 reference statements)

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“…Over the years, many researchers have conducted extensive experimental studies and theoretical analyses of concrete strength theory. [40][41][42] At present, there are few reports on the failure criterion of GFRAC under complex stress state. Consequently, we discuss the failure criteria of GFRAC under three-dimensional stress state in this paper.…”

Section: Gfrac Failure Criterion Under Triaxial Compressionmentioning

confidence: 99%

“…The failure criterion is a mathematical function that describes the failure envelope of the concrete and serves as a condition to determine whether the concrete has reached the failure state or ultimate strength. Over the years, many researchers have conducted extensive experimental studies and theoretical analyses of concrete strength theory 40–42 . At present, there are few reports on the failure criterion of GFRAC under complex stress state.…”

Section: Gfrac Failure Criterion Under Triaxial Compressionmentioning

confidence: 99%

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Microscopic mechanism analysis and failure criterion study of glass fiber recycled concrete under three‐dimensional compressive stress state

Chen,

Wang,

Liang

et al. 2023

Structural Concrete

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This study aims to address the complex stress state commonly observed in concrete structures in practical engineering, as well as the challenges posed by resource scarcity and environmental pollution. To achieve this, a total of 168 cylinder specimens of glass fiber recycled coarse aggregate concrete (GFRAC) were designed for conventional triaxial compression tests. The analysis of the test results reveals that the application of lateral restraint force induces a shift in the failure mode of GFRAC from longitudinal splitting failure to plastic deformation failure, occurring either in the middle or at the end of the specimen. The lateral constraint force can effectively improve the stress and strain at the peak point of GFRAC and the modulus of elasticity of the specimen. The glass fiber increases the peak stress of the specimen, and the maximum growth rate is 20%. On the contrary, the glass fiber reduces the peak strain, and the maximum reduction is 49.66%. Increasing the replacement rate of recycled coarse aggregate will lead to a decrease in peak stress, with a maximum decrease of 19.17%. Glass fiber (GF) limits the appearance and propagation of cracks by bridging, pulling out or breaking. Finally, three different failure criteria are used to analyze the triaxial compression state of GFRAC from a macro perspective.

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Section: Gfrac Failure Criterion Under Triaxial Compressionmentioning

confidence: 99%

Section: Gfrac Failure Criterion Under Triaxial Compressionmentioning

confidence: 99%

Microscopic mechanism analysis and failure criterion study of glass fiber recycled concrete under three‐dimensional compressive stress state

Chen,

Wang,

Liang

et al. 2023

Structural Concrete

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“…Failure cracks will propagate along the shells of the aggregates, resembling those found in normal weight aggregates. These aggregates can exhibit a distinct failure process, as cracks may propagate directly through them (13) . This research highlights the significance of adding basalt fibre as secondary reinforcement in reducing the inherent drawbacks of sintered flyash LWAC like cracking behavior and failure mode.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Structural Performance: Fiber Reinforcement in Sintered Flyash Lightweight Concrete for Impact Resistance and Toughness

Ganesh,

Divyah,

Rajkumar

2024

IJST

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Objectives: The goal of this project is to better understand the interaction between fibers and concrete in order to produce Light Weight Aggregate Concrete (LWAC) with improved structural performance that is made from recycled materials, such as sintered flyash aggregate, and LWAC structures that are more resistant to impact loads and other dynamic forces. Methods: The sintered flyash aggregates are added as coarse aggregate to the concrete and basalt fiber (0.25% of mix) is used as a secondary reinforcement to improve the energy absorption, impact resistance and toughness behaviour. M30 grade of concrete was arrived after laboratory trials after which the mechanical properties were evaluated. The effect of drop impact load on slabs of size 300mm x 300mm x 50mm reinforced with two layers of bundled wire mesh was studied. The flexural properties of concrete reinforced with fiber prism of size 500mm x 100mm x 100mm were evaluated. Findings: With the addition of fiber, ﬂexural toughness index and post-cracking toughness were increased notably on the initial deflections and cracks. The conventional fiber reinforced concrete exhibited a superior peak load capacity compared to normal weight concrete, with a measured increase of 7.5%. Conversely, normal-weight concrete demonstrated a significantly higher deflection under load, exceeding that of fiber reinforced concrete by 47%. LWAC displayed a distinct increase in both peak load (18.7%) and deflection (39.13%) when compared to Normal Weight Aggregate Concrete (NWAC). The incorporation of basalt fiber enhanced the energy absorption by 150% in NWAC and 80% in LWAC. Novelty: The incorporation of fiber into lightweight concrete reduces the brittle nature of failure. The post-cracking toughness behaviour was enhanced because of the effect of crack-arresting by fibers. After the first break, it was discovered to retain residual strength, and removing the fibers from the matrix required more force. Keywords: Sintered flyash aggregate, Light weight concrete, Basalt fiber, Toughness, Impact load, Energy absorption

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“…So far, scholars from various countries have achieved more fruitful results on the mechanical properties of coral concrete [9][10][11]. In 1974, Howdyshell P A [12], a U.S. Army Construction Engineering Laboratory scholar, published a research study on coral concrete and concluded that "it is feasible to formulate concrete using coarse coral aggregates, but the chloride salt content of coral aggregates should be controlled".…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Triaxial Compressive Mechanical Properties of Polypropylene Fiber Coral Seawater Concrete

Shi

Pan

et al. 2022

Materials

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In order to study the mechanical properties of polypropylene fiber all-coral seawater concrete in triaxial compression, 36 specimens were developed and constructed for triaxial compression load testing employing confining pressure value (0, 6, 12, 18 MPa) and polypropylene fiber admixture (1 kg·m−3, 2 kg·m−3, 3 kg·m−3) as variation parameters. The test observed the failure mode of the specimen and obtained the stress–strain curve of the whole process of its force damage failure. An in-depth analysis of polypropylene fiber all-coral seawater concrete’s peak stress, peak strain, initial elastic modulus, axial deflection, energy dissipation, ductility, and damage evolution process was carried out based on the experimental data. The test findings indicated that the best effect on the deformation properties of polypropylene fiber all-coral seawater concrete is obtained when 3 kg·m−3 of polypropylene fiber is blended. Under triaxial compression, the correct number of polypropylene fibers may significantly enhance the peak stress, peak strain, ductility, and elastic modulus of polypropylene fiber all-coral seawater concrete, therefore enhancing the brittle characteristics of coral concrete. During the triaxial surround pressure test, the confining pressure value and polypropylene fiber coupling effect delayed the appearance of initial damage in polypropylene fiber complete coral seawater concrete specimens, slowed the development of damage, and reduced the degree of damage to the specimens.

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Failure Criteria and Constitutive Relationship of Lightweight Aggregate Concrete under Triaxial Compression

Cited by 4 publications

References 33 publications

Microscopic mechanism analysis and failure criterion study of glass fiber recycled concrete under three‐dimensional compressive stress state

Microscopic mechanism analysis and failure criterion study of glass fiber recycled concrete under three‐dimensional compressive stress state

Enhancing Structural Performance: Fiber Reinforcement in Sintered Flyash Lightweight Concrete for Impact Resistance and Toughness

Experimental Study on Triaxial Compressive Mechanical Properties of Polypropylene Fiber Coral Seawater Concrete

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