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Testing of Full Scale Prestressed Beams to Key Performance

R. A. Miller / G. M. Hlavacs / T. W. Long

Adjacent box girder bridges use grouted shear keys to transfer load between beams. These shear keys tend to crack and leak. A full-scale portion of an adjacent box girder bridge was used to test the performance of grouted shear keys under environmental and cyclic loads. Strain gages were placed in the girders and in the shear keys. Displacement gages were placed spanning the shear keys on the top and bottom flanges of the girders. The bridge was subjected to simulated cyclic truck loading as well as environmentally induced thermal loading. The pulse velocity method was employed to find cracks in shear keys. Dye penetration was used to confirm the pulse velocity measurements.

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Testing of Full Scale Prestressed Beams to Key Performance

R. A. Miller / G. M. Hlavacs / T. W. Long

Adjacent box girder bridges use grouted shear keys to transfer load between beams. These shear keys tend to crack and leak. A full-scale portion of an adjacent box girder bridge was used to test the performance of grouted shear keys under environmental and cyclic loads. Strain gages were placed in the girders and in the shear keys. Displacement gages were placed spanning the shear keys on the top and bottom flanges of the girders. The bridge was subjected to simulated cyclic truck loading as well as environmentally induced thermal loading. The pulse velocity method was employed to find cracks in shear keys. Dye penetration was used to confirm the pulse velocity measurements.

Testing of Full Scale Prestressed Beams to Key Performance

R. A. Miller / G. M. Hlavacs / T. W. Long

Adjacent box girder bridges use grouted shear keys to transfer load between beams. These shear keys tend to crack and leak. A full-scale portion of an adjacent box girder bridge was used to test the performance of grouted shear keys under environmental and cyclic loads. Strain gages were placed in the girders and in the shear keys. Displacement gages were placed spanning the shear keys on the top and bottom flanges of the girders. The bridge was subjected to simulated cyclic truck loading as well as environmentally induced thermal loading. The pulse velocity method was employed to find cracks in shear keys. Dye penetration was used to confirm the pulse velocity measurements.

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Title:

Testing of Full Scale Prestressed Beams to Key Performance

Contributors:

R. A. Miller (author) / G. M. Hlavacs (author) / T. W. Long (author)

Publication date:

1998

Size:

108 pages

Type of media:

Report

Type of material:

No indication

Language:

English

Keywords:

Highway Engineering , Construction Equipment, Materials, & Supplies , Girder bridges , Beams(Supports) , Shearing , Tests , Loads(Forces) , Epoxy resins , Cyclic loads , Heavy trucks , Grouts , Prestressed concrete , Shear keys

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