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Experimental Testing and Numerical Simulation of Timber-Concrete Composite Floors in Fire.
- Source :
- Journal of Structural Engineering; Nov2023, Vol. 149 Issue 11, p1-14, 14p
- Publication Year :
- 2023
-
Abstract
- Timber–concrete composite (TCC) floors exposed to fire experience charring and thermal degradation of timber, leading to a reduction in load-carrying capacity. Finite element (FE) modeling supplements data from experimental fire testing and allows for fast and economical investigation of additional design parameters. This research presents fire test results of three large-scale TCC floor specimens and development of an FE modeling methodology for TCC floors in a fire. TCC floors constructed with nail-laminated timber, cross-laminated timber, or mass ply panel, with truss plates or angled screws as shear connectors, are loaded with a uniformly distributed service-level live load and exposed to the ASTM E119-20 standard fire curve. A 2D FE modeling methodology is presented and benchmarked against the test data. The methodology integrates sequentially coupled thermal-structural analyses, which make use of temperature-dependent thermal and mechanical properties of timber and concrete. The deflection and failure times of the FE models are benchmarked against test data. Connector forces from FE models show that shear connectors remain elastic throughout the fire exposure. FE results indicate that the load-carrying capacity is dependent on tensile stress redistribution to the uncharred timber section. The FE modeling methodology effectively calculates the mechanical and fire behavior of TCC floors and highlights limits of the applicability of analytical design methods. [ABSTRACT FROM AUTHOR]
- Subjects :
- WOODEN beams
FIRE exposure
FIRE testing
COMPUTER simulation
LIVE loads
Subjects
Details
- Language :
- English
- ISSN :
- 07339445
- Volume :
- 149
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Journal of Structural Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 172023299
- Full Text :
- https://doi.org/10.1061/JSENDH.STENG-12577