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Engineering Laboratory / Fire Research Division

National Fire Research Laboratory

Steel-Concrete Composite Floor Systems Subject to Fire, Phase 2

Research Overview

The multi-year experimental research project is being conducted on full-scale composite floor systems under realistic large enclosure fires simulated with natural gas burners at the NIST National Fire Research Laboratory. The present test program is aimed at generating technical information and data essential for the development and validation of predictive tools and advancing fire safety design and assessment for steel-framed buildings.

Sauca, A. et al. Development of a Standard Fire Condition for a Large Compartment Floor Assembly. NIST Technical Note 2070, 2019 https://doi.org/10.6028/NIST.TN.2070
Project Website for Steel-Concrete Composite Floor Systems Subject to Fire - Phase 2. https://www.nist.gov/el/fire-research-division-73300/national-fire-research-laboratory-73306/steel-concrete-composite
Choe, L., et al. EXPERIMENTAL STUDY ON FIRE RESISTANCE OF A FULL-SCALE COMPOSITE FLOOR ASSEMBLY IN A TWO-STORY STEEL FRAMED BUILDING, SiF20 - The 11th International Conference on Structures in Fire. Dec. 2020. https://www.nist.gov/publications/experimental-study-fire-resistance-full-scale-composite-floor-assembly-two-story-steel
Choe, L., et al. Fire Resilience of a Steel-Concrete Composite Floor System: Full-Scale Experimental Evaluation for Influence of Slab Reinforcement (Test #2), NIST Technical Note 2203, 2022 https://doi.org/10.6028/NIST.TN.2203
Experiment Name Plot of Heat Release Rate Ignition Photo Date/Time Specimen Fuel Type Test Duration (min) Total Heat Released (MJ) Peak HRR (kW)
15minRamp_R1
Plot of Fire Heat Release Rate with event markers. Uncertainty bar shown at peak value.
Ignition
Four square burners Natural Gas
16.22
5,047
8,034
15minRamp_R2
Plot of Fire Heat Release Rate with event markers. Uncertainty bar shown at peak value.
Ignition
Four square burners Natural Gas
20.00
4,850
7,980
60minRamp_R1
Plot of Fire Heat Release Rate with event markers. Uncertainty bar shown at peak value.
Ignition
Four square burners Natural Gas
76.48
37,631
10,317
CompositeFloorTest_No1
Plot of Fire Heat Release Rate with event markers. Uncertainty bar shown at peak value.
Ignition
Four square burners Natural Gas
107.33
63,542
11,496
CompositeFloorTest_No2
Plot of Fire Heat Release Rate with event markers. Uncertainty bar shown at peak value.
Ignition
Four square burners Natural Gas
160.43
86,908
12,776

Bryant, R. and Bundy, M. The NIST 20 MW Calorimetry Measurement System for Large-Fire Research, Technical Note (NIST TN) 2077, 2019
https://doi.org/10.6028/NIST.TN.2077

NIST Fire Calorimetry Database (FCD)
https://doi.org/10.18434/mds2-2314

Last Updated June 22, 2022