| About this Abstract |
| Meeting |
2024 AWS Professional Program
|
| Symposium
|
2024 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 part for the seismic performance of bridges. 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. 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 paper evaluates the effect of welding on cold-bent ASTM A706 Grade 60 reinforcing steel. The microstructure and microhardness in the heat affected zone (HAZ) of welded lap splices were characterized as a function of the amount of cold-work prior to welding, the bar diameter, and the heat input. The effect on weld strength and ductility was determined using tensile testing of butt welds and guided bend testing. Gleeble simulation of HAZ microstructures with subsequent tensile testing is currently being performed to gather the monotonic stress-strain behavior locally in the different regions of the HAZ of welded cold-bent reinforcing steel compared to standard splices. Results will be included in the presentation. |
| Proceedings Inclusion? |
Undecided |