The paper presents a design analysis related to the tunnel behaviour in case of an internal explosion. Two alternative design solutions are compared: a traditional cast in-situ tunnel solution and a precast tunnel segments solution made of fibre reinforced concrete (FRC). The two different solutions are compared by adopting two design approaches. The former uses finite element linear elastic numerical analyses; the latter adopts non-linear analyses considering material nonlinearities. The results are discussed in terms of M-N interaction diagrams, joint opening for segment solution and energy dissipated from the structure in case of non-linear analyses. The effect of the ring deformability and of fibre reinforcement is also discussed.
TUNNEL DESIGN IN CASE OF INTERNAL EXPLOSION: TRADITIONAL VS SEGMENT SOLUTION
Matteo Colombo;Paolo Martinelli;Marco di Prisco;
2019-01-01
Abstract
The paper presents a design analysis related to the tunnel behaviour in case of an internal explosion. Two alternative design solutions are compared: a traditional cast in-situ tunnel solution and a precast tunnel segments solution made of fibre reinforced concrete (FRC). The two different solutions are compared by adopting two design approaches. The former uses finite element linear elastic numerical analyses; the latter adopts non-linear analyses considering material nonlinearities. The results are discussed in terms of M-N interaction diagrams, joint opening for segment solution and energy dissipated from the structure in case of non-linear analyses. The effect of the ring deformability and of fibre reinforcement is also discussed.| File | Dimensione | Formato | |
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