Mechanical Properties of Steel Fiber-Reinforced Concrete Tunnel Secondary Lining Structure and Optimization of Support Parameters
Abstract
1. Introduction
2. Experimental Study on Secondary Lining Structure of Tunnels
2.1. Engineering Background
2.2. Similarity Ratio Design and Material Selection
2.2.1. Similarity Ratio Design
2.2.2. Material Selection
2.3. Experimental Testing Instruments and Testing Methods
2.4. Model Load Testing
3. Analysis of Experimental Results
3.1. Analysis of Outer Lining Stress in Tunnels
3.2. Analysis of Inner Lining Stress in Tunnel
3.3. Verification and Comparison of Numerical Model Results
3.3.1. Internal Force Calculations for the Secondary Lining
3.3.2. Numerical Model Calculation
4. Finite Element Simulation and Optimization Analysis of Support Parameters
4.1. Constitutive Relationship
- (1)
- Constitutive relationship of concrete plastic damage inelasticity
- (2)
- Constitutive relationship of steel fiber reinforcement
- (3)
- Constitutive soil modeling
4.2. Finite Element Model Establishment
4.2.1. Model Scale
4.2.2. Model Meshing and Element Selection
4.2.3. Boundary Conditions
4.3. Analysis of Results
4.4. Optimization of Secondary Lining Thickness in Tunnels
4.5. Optimization of Circumferential Steel Reinforcement
5. Conclusions and Outlook
5.1. Conclusions
5.2. Outlook
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Parameters | Symbols | Similarity Ratio |
---|---|---|
Elasticity modulus | E | 1/20 |
Poisson’s ratio | μ | 1 |
Cohesive strength | C | 1/20 |
Friction angle | φ | 1 |
Stress | σ | 1/20 |
Strain | ε | 1 |
Displacement | δ | 1/20 |
Lining Concrete | E/GPa | μ | |
---|---|---|---|
Reinforced Concrete | prototype | 30 | 0.21 |
model | 1.5 | 0.21 | |
Steel Fiber Concrete | prototype | 40 | 0.21 |
model | 20 | 0.21 | |
Steel Fiber-Reinforced Concrete | prototype | 41 | 0.21 |
model | 20.5 | 0.21 |
Dilation Angle | Eccentricity Ratio | K | Viscous Parameters |
---|---|---|---|
30 | 0.1 | 0.667 | 0.05 |
Materials | γ/kN/m3 | V | E/GPa |
---|---|---|---|
Class III rock mass | 35.15 | 0.28 | 15 |
Class IV rock mass | 29.13 | 0.32 | 6 |
Class V rock mass | 14.15 | 0.36 | 1.5 |
Ordinary concrete | 24.5 | 0.22 | 30 |
Steel fiber-reinforced concrete | 24.5 | 0.21 | 40 |
Rebar | 72 | 0.29 | 210 |
Component Name | Total Number of Elements | Element Type |
---|---|---|
Rock Mass | 111,370 | C3D8R Elements |
Tunnel Lining | 15,200 | C3D8I Solid Elements |
Rebar Cage | 10,710 | T3D2 Truss Elements |
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Wang, Z.; Wang, Y.; Wang, X.; Rong, B.; Zhang, B.; Wu, L.; Jia, C.; Huang, Z. Mechanical Properties of Steel Fiber-Reinforced Concrete Tunnel Secondary Lining Structure and Optimization of Support Parameters. Buildings 2025, 15, 2390. https://doi.org/10.3390/buildings15142390
Wang Z, Wang Y, Wang X, Rong B, Zhang B, Wu L, Jia C, Huang Z. Mechanical Properties of Steel Fiber-Reinforced Concrete Tunnel Secondary Lining Structure and Optimization of Support Parameters. Buildings. 2025; 15(14):2390. https://doi.org/10.3390/buildings15142390
Chicago/Turabian StyleWang, Zijian, Yunchuan Wang, Xiaorong Wang, Baosheng Rong, Bin Zhang, Liming Wu, Chaolin Jia, and Zihang Huang. 2025. "Mechanical Properties of Steel Fiber-Reinforced Concrete Tunnel Secondary Lining Structure and Optimization of Support Parameters" Buildings 15, no. 14: 2390. https://doi.org/10.3390/buildings15142390
APA StyleWang, Z., Wang, Y., Wang, X., Rong, B., Zhang, B., Wu, L., Jia, C., & Huang, Z. (2025). Mechanical Properties of Steel Fiber-Reinforced Concrete Tunnel Secondary Lining Structure and Optimization of Support Parameters. Buildings, 15(14), 2390. https://doi.org/10.3390/buildings15142390