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Effect of Lithology on Mechanical and Damage Behaviors of Concrete in Concrete-Rock Combined Specimen

Author

Listed:
  • Kewei Liu

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

  • Shaobo Jin

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

  • Yichao Rui

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

  • Jin Huang

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

  • Zhanxing Zhou

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

Abstract

A concrete structure built on rock foundation works together with the connected rock mass, which has a significant effect on the mechanical behaviors of the concrete structure. To study the effect of lithology on the mechanical and damage behaviors of concrete in a concrete-rock combined specimen (CRCS), first, a test method for measuring the concrete part (concrete in CRCS) is adopted, then, uniaxial compression tests on seven types of specimens are performed and acoustic emission (AE) events are simultaneously monitored. Test results show that the low-strength concrete part plays a major role in the fracture behavior of CRCS. When the CRCS is failed, a sudden stress drop happens in CRCS, and the rock part (rock in CRCS) experiences a rapid axial strain recovery and intensifies the failure of the concrete part. The load-bearing and deformation capacities of the concrete part increase with the strength of the rock part, but the rock part shows the opposite behaviors under the influence of the concrete part. Furthermore, the damage of CRCS is mainly formed in the concrete part, and the damage extent of the concrete part is positively correlated with the strength of the rock part. Finally, a damage constitutive model of the concrete part is established and validated. This model can be used to accurately describe the effect of lithology on the mechanical response of the concrete part under uniaxial compression loading.

Suggested Citation

  • Kewei Liu & Shaobo Jin & Yichao Rui & Jin Huang & Zhanxing Zhou, 2022. "Effect of Lithology on Mechanical and Damage Behaviors of Concrete in Concrete-Rock Combined Specimen," Mathematics, MDPI, vol. 10(5), pages 1-17, February.
    • Handle: RePEc:gam:jmathe:v:10:y:2022:i:5:p:727-:d:758415
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    Citations

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    Cited by:

    1. Jiuling Zhang & Gaoyang Ruan & Yang Bai & Tao Ning, 2022. "Mathematical Model and Numerical Simulation Study of the Mining Area with Multiple Air Leakage Paths," Mathematics, MDPI, vol. 10(14), pages 1-16, July.
    2. Lotfi Ben Said & Mondher Wali, 2022. "Accuracy of Variational Formulation to Model the Thermomechanical Problem and to Predict Failure in Metallic Materials," Mathematics, MDPI, vol. 10(19), pages 1-23, September.
    3. Lotfi Ben Said & Marwa Allouch & Mondher Wali & Fakhreddine Dammak, 2022. "Numerical Formulation of Anisotropic Elastoplastic Behavior Coupled with Damage Model in Forming Processes," Mathematics, MDPI, vol. 11(1), pages 1-16, December.
    4. Shaofeng Wang & Xin Cai & Jian Zhou & Zhengyang Song & Xiaofeng Li, 2022. "Analytical, Numerical and Big-Data-Based Methods in Deep Rock Mechanics," Mathematics, MDPI, vol. 10(18), pages 1-5, September.

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