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为了保障岩土工程结构能长期正常使用,需要对其蠕变变形进行分析。“时步-初应变”法是一种常用的计算岩石蠕变的方法。数值流形方法是一种新兴的数值计算方法,常用于计算节理岩体的变形,但尚未被试用于计算蠕变变形。在原数值流形方法的程序中增加了基于“时步-初应变”法的计算模块,通过对广义开尔文模型进行的模拟,显示新程序可以正确反映岩石的黏弹性蠕变趋势,并能够计算包含节理的岩体的蠕变变形,改进后的数值流形方法不但能够模拟岩石的线弹性变形,而且可以模拟岩石的黏弹性蠕变,比原流形方法更能全面地模拟岩石的变形,扩展了数值流形方法在岩土工程中的使用范围。
In order to ensure the long-term normal use of geotechnical engineering structure, its creep deformation needs to be analyzed. “Time step - initial strain ” method is a commonly used method of calculating rock creep. Numerical manifold method is a new numerical method commonly used to calculate the deformation of rock mass, but has not been used to calculate the creep deformation. Based on the original numerical manifold method, a calculation module based on the “time step - initial strain” method is added. The simulation of the generalized Kelvin model shows that the new program can correctly reflect the viscoelastic creep tendency of the rock and can The creep deformation of rock mass containing joints is calculated. The improved numerical manifold method can not only simulate the linear elastic deformation of rock, but also simulate the viscoelastic creep of rock, and can simulate the deformation of rock more comprehensively than the original manifold method , Extends the use of numerical manifold methods in geotechnical engineering.