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A platform for research: civil engineering, architecture and urbanism
Evaluation of Precast Concrete Box Sections Installed without Shear Connectors
The investigation was undertaken to collect strain and deflection data on box culverts, subjected to highway loading, which were installed without shear connectors. After interpreting these data, the necessity of the AASHTO edge beam requirement was assessed and a precast box section with less than two feet of cover was redesigned for HS 20 loading. The re-designed box culvert for C 850 applications resulted in a design that essentially matched the C 789 design for four feet of cover. The re-design was used for an ODOT bridge replacement in 1985 and was successfully tested in the field. Testing of one-sixth size scale models was also performed. Based upon the results of the research, it is concluded that present ASTM C 850 box sections are over-designed structurally and the AASHTO edge beam requirement need not be enforced for box culverts. It is recommended that the present ASTM C 850 specification be discontinued. It is further recommended that the ASTM C 789 specification with four feet of cover serve all cases when the cover is four feet or less. For cover cases greater than four feet, the current ASTM C 789 specification could continue to be used, or perhaps they should be re-designed.
Evaluation of Precast Concrete Box Sections Installed without Shear Connectors
The investigation was undertaken to collect strain and deflection data on box culverts, subjected to highway loading, which were installed without shear connectors. After interpreting these data, the necessity of the AASHTO edge beam requirement was assessed and a precast box section with less than two feet of cover was redesigned for HS 20 loading. The re-designed box culvert for C 850 applications resulted in a design that essentially matched the C 789 design for four feet of cover. The re-design was used for an ODOT bridge replacement in 1985 and was successfully tested in the field. Testing of one-sixth size scale models was also performed. Based upon the results of the research, it is concluded that present ASTM C 850 box sections are over-designed structurally and the AASHTO edge beam requirement need not be enforced for box culverts. It is recommended that the present ASTM C 850 specification be discontinued. It is further recommended that the ASTM C 789 specification with four feet of cover serve all cases when the cover is four feet or less. For cover cases greater than four feet, the current ASTM C 789 specification could continue to be used, or perhaps they should be re-designed.
Evaluation of Precast Concrete Box Sections Installed without Shear Connectors
G. R. Frederick (author) / C. V. Ardis (author)
1987
36 pages
Report
No indication
English
The Shear Behavior of Precast Concrete Sandwich Panels with W-shaped SGFRP Shear Connectors
| Springer Verlag | 2018