Stress Transferring Mechanism of a Pressure Tunnel Lining Strengthened with CFRP
| Autor: | Fan Yang, Gan Qin, Dianqi Jin |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Pressure tunnel Mechanical Engineering Finite element analysis Aerospace Engineering Ocean Engineering Water pressure Bearing ratio Finite element method Mechanism (engineering) Stress (mechanics) Yellow River Crossing Tunnel Mechanics of Materials Automotive Engineering CFRP Stress transferring mechanism General Materials Science Composite material Reinforcement Elastic modulus Civil and Structural Engineering |
| Zdroj: | Latin American Journal of Solids and Structures, Volume: 18, Issue: 7, Article number: e405, Published: 01 NOV 2021 Latin American Journal of Solids and Structures v.18 n.7 2021 Latin American journal of solids and structures Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) instacron:ABCM |
| ISSN: | 1679-7825 1679-7817 |
| DOI: | 10.1590/1679-78256740 |
| Popis: | This paper investigates the stress transferring mechanism of a pressure tunnel strengthened with CFRP. A simplified mechanical model of the internal water pressure transfer from the CFRP to the lining concrete is established, and the key parameters that influence the internal water pressure transfer between the CFRP and lining concrete are identified. A solid-spring-solid three-dimensional finite element model is established. Using the numerical model, the influences of the above key parameters on the ratios of the internal water pressure borne by the concrete and CFRP are investigated. Based on the above results, a reinforcement scheme of the Yellow River Crossing Tunnel is studied and optimized as a case study. This reveals that the elastic modulus and thickness of the CFRP are the two most important factors that affect the ratios of the internal water pressure borne by the concrete and CFRP, and increasing the elastic modulus and thickness of the CFRP can decrease the ratio of the internal water pressure borne by the concrete and improve the stress state of the lining concrete. |
| Databáze: | OpenAIRE |
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