A 3D Creep Model considering Disturbance Damage and Creep Damage and Its Application in Tunnel Engineering. (21st April 2020)

• Record Type: Journal Article
• Authors: Wang, Geng-Feng; Sun, Fan; Xiong, Xiao-Hui; He, Lei; Zhang, Ke-Hong
• Other Names: Lonetti Paolo Academic Editor.
• Is Part Of: Mathematical problems in engineering. Volume 2020(2020)
• Publication Date: 2020-04-21
• Subjects: Engineering mathematics -- Periodicals; 510.2462
• DOI: 10.1155/2020/7073089
• Languages: English
• ISSNs: 1024-123X

Abstract

Abstract : 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.