Purpose: This paper aims to understand the structural fire performance of two-way post-tensioned flat slabs, particularly their deformations and load-carrying mechanisms in fire, and to explore the behaviour of post-tensioned high-strength self-compacting concrete flat slabs with unbonded tendons in fire. Design/methodology/approach: Four tests of post-tensioned high-strength self-compacting concrete flat slabs were conducted under fire conditions. Numerical modelling using the commercial package ABAQUS was conducted to help interpret the test results. Findings: Two of the specimens with lower moisture contents demonstrated excellent fire resistance performance, while the others with slightly higher moisture contents experienced severe concrete spalling. Originality/value: The test results were discussed in respect of thermal profiles, deflections, crack patterns and concrete spalling. The performance of post-tensioned high-strength self-compacting concrete flat slabs with unbonded tendons under fire conditions was better understood.
Bibliographical noteThis article is (c) Emerald Group Publishing and permission has been granted for this version to appear here https://curve.coventry.ac.uk/open/items/ce7f2ff9-cac2-405f-b640-7574a31fb3fd/1/ . Emerald does not grant permission for this article to be further copied/distributed or hosted elsewhere without the express permission from Emerald Group Publishing Limited.
- Fire resistance
- Concrete spalling
- High-strength self-compacting concrete
- Post-tensioned flat slab
- Crack patterns
Wei, Y., Au, F. T. K., Li, J., & Tsang, N. C. M. (2016). Experimental and numerical investigation of post-tensioned concrete flat slabs in fire. Journal of Structural Fire Engineering, 7(1), 2-18. https://doi.org/10.1108/JSFE-03-2016-001