A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Early Age Deflections in Newly Rehabilitated Steel Girder Bridges Made Composite with Concrete Slabs
This paper focuses on deflections and deformations that occur at early ages in newly rehabilitated bridges made from steel girders and composite concrete deck slabs. The research program responds to problems with elevation control and subsequent ride quality problems exhibited in newly constructed or newly rehabilitated steel girder bridges built composite with concrete decks. A full-scale prototype bridge was built and instrumented at the Bert Cooper Engineering Laboratory on the campus of Oklahoma State University in Stillwater, Oklahoma, USA. Early age deflections of the bridge were measured, as were concrete temperatures, concrete strains, steel girder strains and inclinations of the steel girders at ends. Data were analyzed and their relationship to time-dependent concrete properties is established. Results indicate that the concrete strains associated with volume change, including both temperature-related strains and shrinkage strains, are large enough to be considered as one possible cause for adverse ride quality and unwanted deformations in steel girder bridge. The purpose of the research program is to identify causes for undesirable elevation profiles, and to recommend design and construction practices to help mitigate problems created for the highway users and extend the life span of bridges.
Early Age Deflections in Newly Rehabilitated Steel Girder Bridges Made Composite with Concrete Slabs
This paper focuses on deflections and deformations that occur at early ages in newly rehabilitated bridges made from steel girders and composite concrete deck slabs. The research program responds to problems with elevation control and subsequent ride quality problems exhibited in newly constructed or newly rehabilitated steel girder bridges built composite with concrete decks. A full-scale prototype bridge was built and instrumented at the Bert Cooper Engineering Laboratory on the campus of Oklahoma State University in Stillwater, Oklahoma, USA. Early age deflections of the bridge were measured, as were concrete temperatures, concrete strains, steel girder strains and inclinations of the steel girders at ends. Data were analyzed and their relationship to time-dependent concrete properties is established. Results indicate that the concrete strains associated with volume change, including both temperature-related strains and shrinkage strains, are large enough to be considered as one possible cause for adverse ride quality and unwanted deformations in steel girder bridge. The purpose of the research program is to identify causes for undesirable elevation profiles, and to recommend design and construction practices to help mitigate problems created for the highway users and extend the life span of bridges.
Early Age Deflections in Newly Rehabilitated Steel Girder Bridges Made Composite with Concrete Slabs
Jayaseelan, Hema (author) / Russell, Bruce W. (author) / Webb, Alanna Corelle (author)
Structural Engineering International ; 29 ; 575-585
2019-10-02
11 pages
Article (Journal)
Electronic Resource
English