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Experimental Research on Propagation Evolution with Rock-Like Cracks of the CFST Short Columns

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Abstract

To accurately grasp the failure mechanism of surrounding rock in Nanguan deep coal mines, and improve the ability of the concrete filled steel tube support effectively. First, the large size specimens made by rock-like material were compressed under different biaxial loading rates and different intermediate principal stress, meanwhile, the acoustic emission (AE) were used to characterise the crack propagation of the target specimens. In addition, the crack propagation and peeling accurately in the whole progress of uniaxial compression experiment in micro aspects were simulated by using ABAQUS software with cohesive elements in three-dimensional. Finally, the effect of different biaxial loading rates and different intermediate principal stress on crack evolution in large size specimens was analyzed together with the SAEU2S real-time monitoring system of AE behavior characteristics of these specimens. Experimental results clearly indicate that the trend of AE characteristics showed obvious stages when the stress changed by true triaxial testing machine and the rock failure process can be reflected significantly, which proved the efficiency of the proposed cohesive element in ABAQUS.

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Acknowledgements

The work was accomplished within the National Natural Science Foundation of China (CN) (Nos. 51474218 and 41572270).

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Authors and Affiliations

  1. School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing, 100083, People’s Republic of China

    Xiao-nan Zhang, Ren-liang Shan & Lei Zhang

  2. School of Civil Engineering, Hebei University of Engineering, Handan, 056038, People’s Republic of China

    Xiao-nan Zhang

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  1. Xiao-nan Zhang
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  2. Ren-liang Shan
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  3. Lei Zhang
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Correspondence to Xiao-nan Zhang.

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Zhang, Xn., Shan, Rl. & Zhang, L. Experimental Research on Propagation Evolution with Rock-Like Cracks of the CFST Short Columns. Geotech Geol Eng 36, 1863–1872 (2018). https://doi.org/10.1007/s10706-017-0437-z

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  • DOI: https://doi.org/10.1007/s10706-017-0437-z

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