Analysis of Photographically Measured Crack Development from Shear Tests on Large Bridge Girders

The angle, spacing, and width of shear cracks, and the loads at which shear cracks form, are all informative and externally measurable data for assessing the condition of structural concrete members. A large experimental research program was conducted on the shear behavior of 63-in. deep and 72-in. deep bulb-tee girders that were simply supported and subjected to uniformly distributed loads. In this program, a crack-recording method, based on the principles of close-range digital photogrammetry, was used to create complete and accurate crack maps that tracked the development of cracking. It was observed in this research that the angle of diagonal cracking could be predicted using Mohr's circle of stress. Based on test data, equations for computing the average spacing and maximum crack width of inclined cracks were proposed to overcome the deficiencies of current methods.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/12789822
• Authors:
  • Sun, Shaoyun
  • Kuchma, Daniel A
  • Kim, Kang Su
• Publication Date: 2009

Language

• English

Media Info

• Media Type: Print
• Features: Appendices; Figures; References; Tables;
• Pagination: pp 81-98
• Serial:
  • PCI Journal
  • Volume: 54
  • Issue Number: 3
  • Publisher: Precast/Prestressed Concrete Institute
  • ISSN: 0887-9672
  • Serial URL: http://www.pci.org

Subject/Index Terms

• TRT Terms: Bridge members; Concrete bridges; Cracking; Equations; Girders; Mohr circles; Photogrammetry; Shear properties; Shear tests; Structural analysis; Structural deterioration and defects; Structural health monitoring
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01138468
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 14 2009 6:48AM