Research on the influence of contact surface constraint on mechanical properties of rock-concrete composite specimens under compressive loads

Zhao, Baoyun; Liu, Yang; Liu, Dongyan; Huang, Wei; Wang, Xiaoping; Yu, Guibao; Shu, Liu

doi:10.1007/s11709-019-0594-7

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…The interface damage mechanism under shearing action identifies as sliding failure in the case of the relatively smooth interface and asperity degradation in the case of the rough interface. 13 And the stress and strain of the rock–concrete composite specimens with contact restraint are sensibly higher than those without contact restraint 11 . The adhesion properties of the interface, on the other hand, do not depend on the rock strength but are related to the physical properties of the constituent particles for the rock 19 …”

Section: Introductionmentioning

confidence: 97%

“…13 And the stress and strain of the rockconcrete composite specimens with contact restraint are sensibly higher than those without contact restraint. 11 The adhesion properties of the interface, on the other hand, do not depend on the rock strength but are related to the physical properties of the constituent particles for the rock. 19 Meanwhile, to improve the flexural and cracking resistance of the structure, fiber is usually added to the concrete to optimize the material properties.…”

Section: Introductionmentioning

confidence: 99%

“…Extensive research has been conducted on rock–concrete structures, including basic mechanical properties, 2,3,11 durability, 9,12 and numerical simulation 13,14 of the assemblies. Based on the engineering structural properties of rock–concrete assemblies, the interfacial shear properties, interfacial roughness, fracture behavior, deformation behavior, and energy dissipation of the composite have been investigated by scholars from different perspectives 5,7,15–18 .…”

Section: Introductionmentioning

confidence: 99%

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Dynamic splitting tensile behavior of rock–concrete bimaterial disc with multiple material types under different interface inclination angle

Chen

Feng

et al. 2022

Fatigue Fract Eng Mat Struct

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The experimental investigation on the dynamic mechanical properties and failure behavior of rock–concrete composite is of great significance for understanding the mechanical response of rock–shotcrete supporting structures. In the paper, impact splitting tests were performed on Brazilian disc specimens of the rock–concrete bimaterial with different interface inclination angles. Effects of interface inclination angle and material type on dynamic response and failure behavior under dynamic impact were analyzed experimentally. The results show that the dynamic splitting strength and energy dissipation ratio increase with the increase of interface inclination angle. However, the incorporation of fibers will reduce the splitting tensile strength. The crack‐resisting effect of sandstone–fiber concrete is more obvious, and the hysteresis plateau phenomenon appears in the post‐peak section of the stress‐time curve. The interface failure behavior is related to the stress state of the interface and can be divided into three patterns: tensile fracture, shear fracture, and interface non‐ fracture.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic splitting tensile behavior of rock–concrete bimaterial disc with multiple material types under different interface inclination angle

Chen

Feng

et al. 2022

Fatigue Fract Eng Mat Struct

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“…Yang et al [23] developed a three-body model consisting of two geologic bodies and one tectonic body to study how three different materials interact under loads, and thus to explore the response of the ground support system to axial loads in underground space. Zhao et al [24,25] analyzed the effect of contact surface constraints on the strength and deformation characteristics of composite specimens through triaxial compression tests of sandstone-concrete composite specimens, and the damage mechanism of composite specimens. Selçuk and Aşma [26] carried out uniaxial compression, point load and splitting tests of rock-concrete composite interface at different tilt angles, which showed that the uniaxial compression strength of interface tilted from 0° to 90° varied with the angle of the "U"-shape, and the splitting strength increased with the increase of the angle of the interface.…”

Section: Introductionmentioning

confidence: 99%

Study on Coordinated Deformation Failure Mechanism and Strength Prediction Model of Rock-lining Concrete

Hu,

Sun,

Wei

et al. 2024

Period. Polytech. Civil Eng.

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Shotcrete has been widely used in the excavation of caverns and tunnels as a key load-bearing element in the support system. However, the interfacial stresses and bond strengths within the composite structures formed by the interaction of geologic bodies and tectonic formations are not well understood, which can lead to safety accidents and excessive wastage of support materials in engineering. To address this gap, rock-concrete composite specimens were created using six distinct types of surrounding rocks. The strength law of composite specimens was analyzed, and the uniaxial compressive strength prediction model of composite specimens was derived based on Mohr−Coulomb strength yield criterion. The results show that the uniaxial compressive strength of the composite specimen changes with the change of rock type, which is between the strength of rock and concrete. The uniaxial peak strength and elastic modulus of composite specimens are linearly positively correlated with the ratio (Y) of concrete-rock elastic modulus, which is easily affected by concrete properties. However, the peak strain is linearly and negatively correlated with Y, which is greatly influenced by rock. The rock-concrete interface of the composite specimen plays an important role in the failure of the specimen, which changes the stress transfer state of the composite specimen, produces uncoordinated deformation, and finally causes the failure of the specimen. The theoretical and test value error of the derived composite specimen uniaxial compressive strength prediction model are –1.19%~12.20%, and the theoretical calculation model can be used to predict the uniaxial compressive strength of rock-concrete composite specimens.

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Dynamic and Damage Characteristics of Mortar Composite under Impact Load

Zhao

Huang

et al. 2023

KSCE J Civ Eng

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Research on the influence of contact surface constraint on mechanical properties of rock-concrete composite specimens under compressive loads

Cited by 10 publications

References 22 publications

Dynamic splitting tensile behavior of rock–concrete bimaterial disc with multiple material types under different interface inclination angle

Dynamic splitting tensile behavior of rock–concrete bimaterial disc with multiple material types under different interface inclination angle

Study on Coordinated Deformation Failure Mechanism and Strength Prediction Model of Rock-lining Concrete

Dynamic and Damage Characteristics of Mortar Composite under Impact Load

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