Shear failure and mechanical behaviors of granite with discontinuous joints under dynamic disturbance: laboratory tests and numerical simulation

• Autorzy: Gong Hangli , Wang Gang , Luo Yi , Liu Tingting , Li Xinping , Liu Xiqi

Identyfikatory

DOI

10.1007/s43452-023-00712-9

• Języki publikacji: EN

Abstrakty

EN

To investigate the fracture mechanical behavior and failure mechanism of jointed rock mass under compression and shear load. Conventional shear tests and shear tests under normal disturbances were conducted using an electro-hydraulic servo-motor loading system. Meanwhile, the discrete-element program particle flow code was adopted to establish a numerical shear model, and to discuss the microscopic deterioration characteristics and energy dissipation mechanism during shear fracture of rocks with discontinuous joints under joint action of normal static loads and dynamic disturbance. Compared with the conventional shear tests, shear test results under normal disturbances show the following specificities in terms of their macroscopic and microscopic mechanical properties as well as energy evolution: (1) frequent dynamic disturbances accelerate the non-steady fracture process of jointed rock samples and promote occurrence of the weakening effect of shear fracture. (2) The step-like abrupt increase in micro-cracks becomes more obvious before reaching the peak shear stress. (3) The energy-storage capacity and failure resistance of the rocks are weakened. The research results are of great significance for further understanding the dynamic catastrophe effect of deep rock mass.

Słowa kluczowe

EN

discontinuous joint; dynamic disturbance; shear fracture; particle flow code simulation; microscopic deterioration; energy dissipation

PL

pękanie górotworu; pękanie skały; rozproszenie energii

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2023
• Tom: Vol. 23, no. 3
• Strony: art. no. e171, 2023
• Opis fizyczny: Bibliogr. 48 poz., rys., wykr.

Twórcy

autor

Gong Hangli

• School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
• Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology, Wuhan 430070, China
• Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore

autor

Wang Gang

• Key Laboratory of Geotechnical and Structural Engineering Safety of Hubei Province, School of Civil Engineering, Wuhan University, Wuhan 430070, China
• Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology, Wuhan 430070, China

autor

Luo Yi

• School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
• Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology, Wuhan 430070, China

autor

Liu Tingting

• School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
• Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology, Wuhan 430070, China

autor

Li Xinping

• School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
• Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology, Wuhan 430070, China

autor

Liu Xiqi

• Key Laboratory of Geotechnical and Structural Engineering Safety of Hubei Province, School of Civil Engineering, Wuhan University, Wuhan 430070, China

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024)