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A 3D Creep Model considering Disturbance Damage and Creep Damage and Its Application in Tunnel Engineering

机译:考虑扰动损伤和蠕变损伤的三维蠕变模型及其在隧道工程中的应用

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摘要

Based on the Kachanov damage theory and elastic wave theory, considering the long-term creep damage from time dimension and instantaneous disturbance damage from space dimension, we presented a 3D damage creep model and converted it to difference expressions in order to write into the finite difference software FLAC(3D). Then, according to the results of creep tests, we conducted parameter inversion of our damage creep model with the help of the particle swarm optimization (PSO) method. Finally, the damage creep model was applied in a railway tunnel project in Yunnan to simulate the tunnel deformation. Compared with the Burgers model and the model considering only creep damage, our model which considers both creep damage and disturbance damage yielded more reasonable results.
机译:基于Kachanov损伤理论和弹性波理论,考虑时间维度的长期蠕变损伤和空间维度的瞬时扰动损伤,提出了三维损伤蠕变模型,并将其转换为差分表达式,写入有限差分软件FLAC(3D)。然后,根据蠕变试验结果,借助粒子群优化(PSO)方法对损伤蠕变模型进行了参数反演。最后,将损伤蠕变模型应用于云南某铁路隧道工程,模拟隧道变形。与Burgers模型和仅考虑蠕变损伤的模型相比,同时考虑蠕变损伤和扰动损伤的模型得出了更合理的结果。

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