About this Abstract |
| Meeting |
2025 AWS Professional Program
|
| Symposium
|
2025 AWS Professional Program
|
| Presentation Title |
Mechanical Properties of Welded Splices on Cold-Bent Reinforcing Steel |
| Author(s) |
Jacob Stickle, Carolin Fink |
| On-Site Speaker (Planned) |
Jacob Stickle |
| Abstract Scope |
Concrete-filled pipe pile systems are an essential component of bridge pier seismic performance. Reinforcing steel bars are cold-bent into hoops and spirals which are then splice welded to serve as confinement in the pipe pile system. ASTM A706 reinforcing steel bars are often specified in members that are expected to form plastic hinges. According to AASHTO LRFD Bridge Design Specifications these welds need to be in compliance with AWS D1.4 Structural Welding Code – Steel Reinforcing Bars. However, welding within two bar diameters of the bent portion of steel is not permitted in AWS D1.4.
This presentation will cover the findings of a study aimed at investigating the effect of welding on cold-bent ASTM A706 Grade 60 reinforcing steel. Specific objectives of this study were (1) to determine changes in the microstructure and microhardness in the heat-affected zone (HAZ) of welded cold-bent reinforcing steel, (2) to compare the tensile strength and ductility for welds made on cold-bent versus unbent reinforcing steel, (3) to determine the monotonic stress-strain behavior locally in the HAZ of welded cold-bent reinforcing steel, and (4) to identify specific requirements and/or acceptance criteria for welding on cold-bend reinforcing steel beyond those in AWS D1.4.
The presentation will conclude with the findings of this study and recommend changes to D1.4. |
| Proceedings Inclusion? |
Undecided |