engleski

Durability Modelling of Behaviour of a Different Concrete Types As Tunnel Lining Elements

Development of novel building materials based on a cement binder, and improvement of the properties of existing materials made considerable progress at the end of last century and at the beginning of this century. One of innovative types of concrete that occurred in this period is a high-performance fibre-reinforced concrete (HPFRC). To the present day a small number of structures made of this kind of concrete were constructed. Tunnelling is one of rare fields of civil engineering in which application of HPFRC has not been closely investigated so far. In this paper is shown an experimental research work carried out on different concrete types: conventional concrete and high-performance fibre-reinforced concrete. Experimentally obtained values of mechanical properties of the said concrete types were used in modelling the behaviour of secondary tunnel lining. In numerical analyses, the parameters that were varied were the following: the type and cross-section of concrete in secondary tunnel lining and the type of durability loading. The analyses carried out showed that HPFRC used for fabrication of secondary tunnel lining has higher durability and safety than other concrete types.

Durability behaviour; high-performance fibre-reinforced concrete; tunnel lining

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