Steel-fibre-reinforced concrete (SFRC) in fire: Normative and pre-normative requirements and code-type regulations

摘要

In recent years, because of developments in materials technology, by the understanding of fundamental relationships as well as due to experimentally and numerically driven modelling and design, the use of steel-fibre-reinforced concrete (SFRC) is steadily increasing. One major issue which needs to be taken particularly into account for most SFRC applications is the evidence of their structural safety under fire exposure. This paper gives an overview of nationally and internationally available normative and pre-normative requirements and code-type regulations to model and design both the material and structural behaviour of fire-exposed SFRC. The paper will also illustrate that the fire behaviour of SFRC needs to be mandatorily considered both from a technical and legal perspective. Since an implied fire design approach is still pending, experimental verifications are still recommended on a material level but primarily on a structural level in order to provide technically and economically reasonable solutions which do not restrict innovative stages due to conservative assumptions.