Structural health monitoring of tunnel liners
SFRC is a composite material that has high cracking resistance. Thus, it is used in precast tunnel segment production to resist stress induced by mechanical handling of tunnel boring machines. However, due to lack of experimental data and special design code makes unable to take full advantage...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
Nanyang Technological University
2022
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| Online Access: | https://hdl.handle.net/10356/163915 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | SFRC is a composite material that has high cracking resistance. Thus, it is used in
precast tunnel segment production to resist stress induced by mechanical handling
of tunnel boring machines. However, due to lack of experimental data and special
design code makes unable to take full advantages of SFRC material properties.
The aim is to study stress-strain behaviour of 3 points bending action using finite
element method. The results showed SFRC can assist rebars in resisting tensile
stress before cracking as well as increase cracking load. Therefore, it can be said
that steel fibres can partially replace rebars. On the other hand, after cracking,
rebars took majority of tensile stress. Thus, rebars are more effective after cracking
as well as ultimate loads compared to steel fibres. For these reasons, special
design rules should be made to take advantages of its properties yet still with
considerations for its disadvantages. Finally, due to complexity and arbitrary nature
of finite element method, experiments should be conducted to validate FEM results. |
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