Description

A 12.8 m-long composite floor beam consisting of a steel reinforced concrete slab with profiled metal decking supported by a W18×35 steel beam was tested under multi-point bending load at ambient temperature. Material strain and temperature were measured using fiber optic sensors. Measurements were taken along more than 150 m of fiber optic cables using Pre-Pump Pulse Brillouin Optical Time Domain Analysis (PPP-BOTDA) and Optical Frequency Domain Reflectometry (OFDR). Along the beam centerline, three strain and two temperature fiber loops were placed to characterize the strain and temperature distribution along and through the depth of the concrete slab. The neutral axis depth was evaluated using the measured data and compared with theoretic predictions for a fully-composite beam and a non-composite beam. The theoretic prediction was based on an elastic steel and elastic cracked concrete section and was found in general agreement with the test data.

Location

St. Louis, Missouri

Start Date

8-7-2019 8:20 AM

End Date

8-7-2019 8:40 AM

Meeting Name

INSPIRE-UTC 2019 Annual Meeting

Department(s)

Civil, Architectural and Environmental Engineering

Comments

Financial support for this study is provided by the National Institute of Standards and Technology under Award No. 70NANB13H183 and the U.S. Department of Transportation, Office of the Assistant Secretary for Research and Technology (USDOT/OST-R) under Grant No. 69A3551747126 through INSPIRE University Transportation Center (http://inspireutc. mst.edu) at Missouri University of Science and Technology.

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type

text

Language(s)

English

Source Publication Title

Proceedings of the 9th International Conference on Structural Health Monitoring of Intelligent Infrastructure (2019: Aug. 4-7, St. Louis, MO)

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Aug 7th, 8:20 AM Aug 7th, 8:40 AM

Distributed Strain Measurements in a Steel-Concrete Composite Floor Beam under Multi-Point Loading at Ambient Temperature

St. Louis, Missouri

A 12.8 m-long composite floor beam consisting of a steel reinforced concrete slab with profiled metal decking supported by a W18×35 steel beam was tested under multi-point bending load at ambient temperature. Material strain and temperature were measured using fiber optic sensors. Measurements were taken along more than 150 m of fiber optic cables using Pre-Pump Pulse Brillouin Optical Time Domain Analysis (PPP-BOTDA) and Optical Frequency Domain Reflectometry (OFDR). Along the beam centerline, three strain and two temperature fiber loops were placed to characterize the strain and temperature distribution along and through the depth of the concrete slab. The neutral axis depth was evaluated using the measured data and compared with theoretic predictions for a fully-composite beam and a non-composite beam. The theoretic prediction was based on an elastic steel and elastic cracked concrete section and was found in general agreement with the test data.