TRB's National Cooperative Highway Research Program (NCHRP) Report 678: Design of FRP Systems for Strengthening Concrete Girders in Shear offers suggested design guidelines for concrete girders strengthened in shear using externally bonded Fiber-Reinforced Polymer (FRP) systems.
The guidelines address the strengthening schemes and application of the FRP systems and their contribution to shear capacity of reinforced and prestressed concrete girders. The guidelines are supplemented by design examples to illustrate their use for concrete beams strengthened with different FRP systems.
Appendix A of NCHRP Report 678, which contains the research agency's final report, provides further elaboration on the work performed in this project. Appendix A: Research Description and Findings, is only available online.
Table of Contents
|1.4 Organization of the Report||4-6|
|2.2 Field Applications||7-7|
|2.4 Experimental Investigations Reported in the Literature||8-20|
|2.5 Current Codes/Guidelines/Specifications||21-21|
|2.6 Factors Affecting the Design of FRP Shear Strengthening||22-31|
|2.7 Performance Evaluation of Existing Design Methods||32-32|
|2.8 Suggestions for Improved Design Methods||33-34|
|2.9 Reliability Assessment||35-36|
|3.1 Approaches for Relevant Changes to AASHTO LRFD Bridge Design Specifications||37-37|
|3.3 Design Examples||38-38|
|4.1 Summary of Findings||39-39|
|4.2 Suggestions for Future Research||40-40|
|Attachment A - Recommended Changes to AASHTO LRFD Bridge Design Specifications||51-58|
|Attachment B - Recommended Design Guidelines for Concrete Girders Strengthened in Shear with FRP||59-120|
|Abbreviations used without definitions in TRB publications||121-121|