A5063092067- Geotechnical Engineering and Analysis
- Geotechnical Engineering and Underground Structures
- Rock Mechanics and Modeling
- Multi-Criteria Decision Making
- Energy Efficiency and Management
- Efficiency Analysis Using DEA
Nanjing University of Information Science and Technology
2023
China Academy of Railway Sciences
2022
Based on the repeated “tensile-compressive-tensile-compressive” stress characteristics of tunnel-base concrete structure, double scalar damage variables were defined using stochastic mechanics. The elastoplastic Helmholtz free energy was corrected by introducing hardening parameter. A dynamic constitutive model with nonlinear and strain-rate effect behavior derived via expansion based principle dissipation. An “elastic prediction-plastic correction” numerical analysis algorithm developed...
Due to the complexity of tunnels, accurate prediction their loosening pressures in layered jointed rock strata is a very difficult engineering task. To recognize patterns and estimate pressures, numerical tests were employed areas where tunnels excavated strata. A total 12 influential factors, including joints, tunnel depth, strata, considered each models. Three found testing: ringent trumpet-shaped boundary, an arch-shaped closing-trend zone. Empirical expressions for zone boundaries...