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Bending Tests of Full-Scale Steel Fiber-Reinforced Concrete Segments of Shield Tunnel
To evaluate the bending performance of a steel fiber-reinforced concrete shield segment, bending testing was conducted on prism specimens and full-scale segments with 30 kg/m3 and 40 kg/m3 steel fiber. The results show that, with increasing fiber content, the ultimate and equivalent flexural strengths increase, while the flexural toughness of the prism concrete specimen increases by approximately 15%. With increasing fiber content, the flexural capacity of the shield tunnel segment increases, the peak load increases by 24%, the crack number increases, and the average crack width decreases. During bending tests, the steel fiber-reinforced concrete segment shows remarkable characteristics of strain hardening and multiple cracking. The embedded parts reduce the cross-sectional area and cause stress concentration in the mid-span; therefore, the main crack form in this region.
Bending Tests of Full-Scale Steel Fiber-Reinforced Concrete Segments of Shield Tunnel
To evaluate the bending performance of a steel fiber-reinforced concrete shield segment, bending testing was conducted on prism specimens and full-scale segments with 30 kg/m3 and 40 kg/m3 steel fiber. The results show that, with increasing fiber content, the ultimate and equivalent flexural strengths increase, while the flexural toughness of the prism concrete specimen increases by approximately 15%. With increasing fiber content, the flexural capacity of the shield tunnel segment increases, the peak load increases by 24%, the crack number increases, and the average crack width decreases. During bending tests, the steel fiber-reinforced concrete segment shows remarkable characteristics of strain hardening and multiple cracking. The embedded parts reduce the cross-sectional area and cause stress concentration in the mid-span; therefore, the main crack form in this region.
Bending Tests of Full-Scale Steel Fiber-Reinforced Concrete Segments of Shield Tunnel
Key Engineering Materials ; 768 ; 326-330
2018-04-25
5 pages
Article (Journal)
Electronic Resource
English
Bending Tests of Full-Scale Steel Fiber-Reinforced Concrete Segments of Shield Tunnel
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