Analytical model of elasto-plastic and numeric analysis for the constant resistance large deformation(NPR) cable
HU Jie1，2，LI Zhaohua1，FENG Jili1，ZHANG Longfei1，2，ZHOU Tiantian1，2，HE Manchao1
(1. State Key Laboratory for Geomechanics and Deep Underground Engineering，China University of Mining and Technology(Beijing)，Beijing 100083，China；2. School of Mechanics and Civil Engineering，
China University of Mining and Technology(Beijing)，Beijing 100083，China)
Abstract：In order to analyze the supernormal mechanics mechanism of NPR cable，first，an analytical model was applied to analyze the mechanical property of the NPR cable in elasto-plastic framework and was verified by the experimental result；Second，several parameter sensitivity analyses were performed and discussed. The relationship between the constant resistance and the geometrical parameters and mechanical parameters was then revealed；Finally，a 3D numerical model of NPR cable was established，and the corresponding parameters were calibrated in line with the experimental results. The numerical results were in agreement with experimental and analytical results. The variation trend of radial and axial displacement magnitude of pipe was discussed. The numerical and analytical models were proven reliable as assistant tools to design and improve the NPR cables in the future.
胡 杰1，2，李兆华1，冯吉利1，张龙飞1，2，周田甜1，2，何满潮1. 恒阻大变形锚索弹塑性解析模型及数值分析[J]. 岩石力学与工程学报, 2019, 38(S2): 3565-3574.
HU Jie1，2，LI Zhaohua1，FENG Jili1，ZHANG Longfei1，2，ZHOU Tiantian1，2，HE Manchao1. Analytical model of elasto-plastic and numeric analysis for the constant resistance large deformation(NPR) cable. , 2019, 38(S2): 3565-3574.
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2019, Vol. 38 
