Assessment of coupled thermo-mechanical behaviour of ultra high performance concrete columns in case of fire

Author(s): M. Siemon, D. Hosser
Paper category: Symposium
Book title: RILEM-fib-AFGC International Symposium on Ultra-High Performance Fibre-Reinforced Concrete
Editor(s): F. Toutlemonde, J. Resplendino
Print ISBN: 978-2-35158-130-8
e-ISBN: 978-2-35158-131-5
Publisher: RILEM Publications S.A.R.L
Pages: 315– 324
Total Pages: 10
Language: English

Abstract: 
This paper presents the investigations on the coupled thermo-mechanical behavior of UHPFRC in case of fire. For the thermal properties like thermal conductivity and thermal diffusivity the transient plane source method (TPS) has been used, the specific heat and the mass loss were determined via differential scanning calorimeter and the thermo gravimetric analysis. The mechanical properties like the temperature-dependent stress-strain relations and the thermal expansion were derived using steady-state and transient tests as well as middle-scale experiments for the assessment of the spalling behavior. As a result, the temperature dependent strength and stress-strain relations were calculated by analogy to the data given in Eurocode 2 for normal strength concrete. To check the practicability of the data, real scale experiments assessing the characteristics of UHPFRC columns under combined mechanical and thermal load were carried out, providing detailed information on the displacement behavior.

Online publication: 2014
Publication Type: full_text
Public price (Euros): 0.00