Study on the energy evolution process and damage constitutive model of concrete–granite composite specimens under uniaxial compression load

被引：0

作者：

Zhuo Dong ^{[1
]}

Yingxian Lang ^{[2
]}

Bin Gong ^{[3
]}

Ruifu Yuan ^{[4
]}

Zhengzhao Liang ^{[1
]}

Shanyong Wang ^{[2
]}

Chun’an Tang ^{[3
]}

机构：

[1] School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo

[2] State Collaborative Innovation Center of Coal Work Safety and Clean-Efficiency Utilization, Henan Polytechnic University, Jiaozuo

[3] State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Liaoning, Dalian

[4] Department of Civil and Environmental Engineering, Brunel University London, London

[5] Discipline of Civil, Surveying and Environmental Engineering, School of Engineering, The University of Newcastle, Callaghan

来源：

Geomechanics and Geophysics for Geo-Energy and Geo-Resources | 2024年 / 10卷 / 1期

基金：

中国国家自然科学基金;

关键词：

Concrete–granite composite specimens; Energy evolution process; Mechanical properties; Piecewise damage constitutive model; Uniaxial compression;

D O I：

10.1007/s40948-024-00910-6

中图分类号：

学科分类号：

摘要：

The interaction between concrete structures and rock foundations is a crucial research topic for assessing safety and stability in geotechnical and underground engineering. The uniaxial compression tests were conducted on different combination modes (concrete component heights (Hc), interface inclination angle (β), and coarse aggregate contents) to investigate their impact on the mechanical and energy response of concrete–granite composite specimens (CGCSs). This study categorized three failure modes: only concrete component failure (Hc = 80 mm), shear failure along the interface (β = 30°), and simultaneous failure of both components (other combination modes). The fractal dimension (Df) of surface cracks positively correlates with Hc, while the compressive strength (σCGCS) and stiffness (ECGCS) exhibit an inverse trend. The value of Df and σCGCS both exhibit a ''U-shaped'' trend when β ranges from 0° to 90°, whereas the value of ECGCS decreases linearly. Moreover, The value of Df and ECGCS positively correlate with coarse aggregate contents, while the value of σCGCS trends vary non-monotonically increases. The coarse aggregate contents have few effects on energy conversion. Typical brittle failure (β = 0°, β = 30°, and Hc = 20 mm) and ductile failure (other combination modes) are observed. Energy evolution characteristics offer quantitative insight into the damage evolution processes of CGCSs. The piecewise damage constitutive model based on dissipation energy can accurately describe the mechanical response of CGCSs. This study enhances understanding of the mechanical properties, failure characteristics, and energy evolution process of CGCSs under complex combination modes. © The Author(s) 2024.

引用

共 49 条

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