Measurement of the Behavior of Steel Beams under Localized Fire Exposure
A total of nine localized fire tests on steel beams were designed and conducted in the National Fire Research Laboratory as part of its commissioning project, including thermal tests (Tests 1 through 5) and four-point bending test at ambient (Test 6) and elevated temperatures (Tests 7 through 9). All the tested specimens were nominally 6.2-m long W16×26 beams made of ASTM A992 steel. Each specimen was supported by one of the two following connections: (i) simple support (Tests 1 through 8), and (ii) double-angles bolted to laterally braced support columns (Test 9). The midspan of each specimen was exposed to an open-flame fire using the 1-m2 natural gas burners. The burner was located 1.1 m below the bottom flange of the beam at midspan. A four-point flexural loading scheme was used to apply concentrated forces at two locations 2.44 m apart around midspan. The data included temperatures, the heat release rates from the burner, and structural measurements including forces, displacements and strains. The Type B standard uncertainties in various measurements were also included. Overall, the test results showed that the heating rate of the specimen was sensitive to the prescribed heat release rate-time relationship. However, the thermal gradient developed in the fire-exposed cross sections of the beam never achieved linearity under the localized fire exposure. Regardless of the connection types and fire conditions (i.e., steady-state or transient-state fire), the beams exhibited a similar behavior and failure mode. When subjected to combined fire and flexural loads, the beam specimens exhibited the lateral-torsional buckling followed by runaway vertical displacements at midspan. Additional details of experimental procedures and uncertainty analysis for this experimental series are provided in the following publications: 1) Zhang, C., Choe, L., Gross, J., Ramesh, S., Bundy, M. (2017). Engineering Approach for Designing a Thermal Test of Real-scale Steel Beam Exposed to Localized Fire. Fire Technology, Vol 53, Issue 4, pp 1535-1554. DOI: 10.1007/s10694-016-0646-7 2) Choe, L., Ramesh, S., Zhang, C., Gross, J. (2016). The Performance of Structural Steel Beams Subjected to a Localized Fire. The 9th International Conference on Structures in Fire (SiF 16), June 8-10, 2016, Princeton, NJ.
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| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| accrualPeriodicity | irregular |
| bureauCode |
[ "006:55" ] |
| contactPoint |
{ "fn": "Lisa Choe", "hasEmail": "mailto:lisa.choe@nist.gov" } |
| description | A total of nine localized fire tests on steel beams were designed and conducted in the National Fire Research Laboratory as part of its commissioning project, including thermal tests (Tests 1 through 5) and four-point bending test at ambient (Test 6) and elevated temperatures (Tests 7 through 9). All the tested specimens were nominally 6.2-m long W16×26 beams made of ASTM A992 steel. Each specimen was supported by one of the two following connections: (i) simple support (Tests 1 through 8), and (ii) double-angles bolted to laterally braced support columns (Test 9). The midspan of each specimen was exposed to an open-flame fire using the 1-m2 natural gas burners. The burner was located 1.1 m below the bottom flange of the beam at midspan. A four-point flexural loading scheme was used to apply concentrated forces at two locations 2.44 m apart around midspan. The data included temperatures, the heat release rates from the burner, and structural measurements including forces, displacements and strains. The Type B standard uncertainties in various measurements were also included. Overall, the test results showed that the heating rate of the specimen was sensitive to the prescribed heat release rate-time relationship. However, the thermal gradient developed in the fire-exposed cross sections of the beam never achieved linearity under the localized fire exposure. Regardless of the connection types and fire conditions (i.e., steady-state or transient-state fire), the beams exhibited a similar behavior and failure mode. When subjected to combined fire and flexural loads, the beam specimens exhibited the lateral-torsional buckling followed by runaway vertical displacements at midspan. Additional details of experimental procedures and uncertainty analysis for this experimental series are provided in the following publications: 1) Zhang, C., Choe, L., Gross, J., Ramesh, S., Bundy, M. (2017). Engineering Approach for Designing a Thermal Test of Real-scale Steel Beam Exposed to Localized Fire. Fire Technology, Vol 53, Issue 4, pp 1535-1554. DOI: 10.1007/s10694-016-0646-7 2) Choe, L., Ramesh, S., Zhang, C., Gross, J. (2016). The Performance of Structural Steel Beams Subjected to a Localized Fire. The 9th International Conference on Structures in Fire (SiF 16), June 8-10, 2016, Princeton, NJ. |
| distribution |
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| identifier | 59145AB0040F183BE0531A5706818E571856 |
| keyword |
[ "steel beam; localized fire; thermal and mechanical behavior; experimental test" ] |
| landingPage | https://data.nist.gov/od/id/59145AB0040F183BE0531A5706818E571856 |
| language |
[ "en" ] |
| license | https://www.nist.gov/open/license |
| modified | 2017-08-14 00:00:00 |
| programCode |
[ "006:045" ] |
| publisher |
{ "name": "National Institute of Standards and Technology", "@type": "org:Organization" } |
| references |
[ "https://doi.org/10.1007/s10694-016-0646-7" ] |
| theme |
[ "Fire:Structural fire resistance" ] |
| title | Measurement of the Behavior of Steel Beams under Localized Fire Exposure |
