Experimental and numerical investigation of post-tensioned concrete flat slabs in fire. (14th March 2016)

• Record Type: Journal Article
• Authors: Wei, Ya; Au, Francis T.K.; Li, Jing; Tsang, Neil C.M.
• Is Part Of: Journal of structural fire engineering. Volume 7:Number 1(2016)
• Page Start: 2
• Page End: 18
• Publication Date: 2016-03-14
• Subjects: Fire resistance -- Concrete spalling -- Fire -- High-strength self-compacting concrete -- Post-tensioned flat slab -- Crack patterns; Fire protection engineering -- Periodicals; 628.92205
• DOI: 10.1108/JSFE-03-2016-001
• Languages: English
• ISSNs: 2040-2317

Abstract

Abstract : 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.