NDLI: Field Measured Dynamic Effects and Load Distribution in a Prestressed Concrete Light Rail Bridge

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Khan, Easa Daniel, G. Linzell Bernard, A. Frankl John, A. Lobo Lozano, Samuel
Copyright Year	2016
Abstract	Live load performance of a recently constructed, prestressed concrete bridge was investigated to determine the Impact Factors (IMs), the Girder Distribution Factors (GDFs). The bridge was subjected to controlled static and dynamic loading using two Denver Transit Partners (DTP) electric-multiple-unit rail cars prior to a commuter rail line being placed into service. The rail cars travelled along northbound and southbound tracks of the four span, horizontally curved, bridge at various speeds. A total 24 tests were conducted and response was measured using a combination of strain sensors and accelerometers installed at critical sections on the supporting girders. Results for IMs and GDFs obtained from the field tests are presented. These results are also compared against relevant code provisions and these preliminary results indicated that IMs are insensitive to train speed and are smaller than investigated code provisions and that measured GDFs were different than those provided by these code provisions.
Sponsorship	Rail Transportation Division
File Format	PDF
ISBN	9780791849675
DOI	10.1115/JRC2016-5765
Conference Proceedings	2016 Joint Rail Conference
Language	English
Publisher Date	2016-04-12
Publisher Place	Columbia, South Carolina, USA
Access Restriction	Subscribed
Subject Keyword	Rails Accelerometers Pavement live loads Trains Bridges (structures) Prestressed concrete Dynamic testing (materials) Automobiles Stress Girders Strain sensors
Content Type	Text
Resource Type	Article

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