SHEAR STRENGTH OF JOINTS IN PRECAST CONCRETE SEGMENTAL BRIDGES

The overall behavior, including the ultimate strength of segmental bridges, depends on the behavior of the joints between segments. This article reports on a study of the shear strength of joins in precast concrete segmental bridges. The authors note that to accurately predict the bridge response throughout the complete range of loading, knowledge of joint behavior is essential. The authors test a series of full-scale joints, flat and keyed, dry and epoxied, single-keyed and multiple-keyed, under different confining stress levels and epoxy thicknesses. The results showed that the shear capacity of joints increased as confining pressure increased, and epoxied joints had consistently higher shear strength than dry joints; however, the failure was more brittle than dry joints. The authors compared their experimental results to the AASHTO and other design criterion, determining that some strength reduction factors should be introduced to the design relationships when applied to multiple-keyed dry joints. AASHTO provisions give lower shear capacity for single-keyed dry joints, but always greatly overestimate the shear capacity of multiple-keyed dry joints; for epoxied joints, the agreement is better with the experimental results.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846957
• Supplemental Notes:
  • For this issue of the ACI Structural Journal, the date is January/February 2005.
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Zhou, Xiangming
  • Mickleborough, N
  • Li, Zhihao
• Publication Date: 2005-1

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 3-11
• Serial:
  • ACI Structural Journal
  • Volume: 102
  • Issue Number: 1
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-3241
  • Serial URL: http://www.concrete.org/PUBS/JOURNALS/SJHOME.ASP

Subject/Index Terms

• TRT Terms: Box girder bridges; Bridge engineering; Concrete bridges; Epoxides; Joints; Mechanical loads; Precast concrete; Segmental construction; Shear strength
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00985144
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 31 2005 12:00AM