Fire Design of Concrete Structures: A State-of-Art Report
This article summarizes the main contents of fib Bulletin 38, which presents a state-of-art report on fire design of concrete structures. The bulletin covers the following topics:
The effect of fire on concrete material and structures, including high strength concrete, explosive spalling, and tunnel fires.
The basic principles of performance based fire engineering and fire modelling.
The current practices and standards for fire design of concrete structures.
The future developments and research needs in this field.
The bulletin is intended to provide an overview of the recent trends and developments in fire design of concrete structures, as well as to highlight the key influencing factors, deficiencies, and challenges. The bulletin is aimed at a wide audience of concrete professionals, such as engineers, researchers, designers, contractors, and code writers.
The bulletin can be purchased from the fib secretariat at https://www.fib-international.org/publications/fib-bulletins/fire-design-of-concrete-structures-pdf-detail.html. The bulletin has 106 pages and costs CHF 80 for non-members and CHF 40 for members. The ISBN is 978-2-88394-078-9 and the DOI is doi.org/10.35789/fib.BULL.0038.One of the main topics covered in the bulletin is the effect of fire on concrete material and structures. Concrete is a complex material that undergoes various physical and chemical changes when exposed to high temperatures. These changes affect the mechanical properties, thermal properties, and durability of concrete. The bulletin reviews the current knowledge and experimental data on the behaviour of concrete at elevated temperatures, including normal strength concrete, high strength concrete, fibre reinforced concrete, and self-compacting concrete. The bulletin also discusses the phenomenon of explosive spalling, which is the sudden ejection of concrete fragments from the surface due to pore pressure build-up. The bulletin presents the possible mechanisms, influencing factors, and mitigation measures for spalling.
Another topic covered in the bulletin is the effect of fire on tunnel structures. Tunnel fires pose a serious threat to human life, property, and infrastructure. The bulletin reviews the recent tunnel fire incidents and their consequences, such as structural damage, collapse, and closure. The bulletin also presents the current methods and standards for fire safety design and assessment of tunnel structures. The bulletin highlights the challenges and limitations of these methods, such as the lack of realistic fire scenarios, the uncertainty of material properties at high temperatures, and the complexity of structural behaviour under fire. The bulletin also suggests some possible improvements and future research directions in this field. ec8f644aee