Synthesize Available Data to Develop Predictive Model for Weld Performance that can be used to Identify Appropriate Weld Procedure(s) and Process(es) Considering Intended Behavior, Joint Configuration, Material Properties, and Inspection Procedures 

Principal Investigators: Manvendra Misra, William Navidi, Stephen Liu 
Colorado School of Mines 

    From the database generated for the simple welded joints constructed using the FCAW-SS process and tested in Sub-tasks 5.1.2, 5.2.1, 5.2.2, 5.2.3 and elsewhere, a theoretical/empirical model of joint behavior will be developed based on a description of its physical, material, metallurgical and defect characteristics, and loading intensity and rate. This data will be augmented by experimental and analytical information on full-scale beam to column connections (Sub-tasks 5.3.1 and 7.02), as well as data regarding the performance of actual buildings during past earthquakes. Information obtained outside of the project will also be utilized to develop this model, as appropriate. The confidence that can be placed in the resulting model will be evaluated. 

    The model should resemble or incorporate as many of the regions and factors for the conceptual representation of welded joints as set forth by the Technical Advisory Panel for Joining and Inspection. The model is expected to be able to be incorporated into other finite element analysis packages that determine overall welded connection behavior. This model is also expected to determine the conditions in which fracture may occur and the respective failure mode and load. Areas where confidence in the results predicted in the model are high and low should be identified as should specific needs for additional information within current sub-task areas. If new lines of investigation are needed, these should be identified as well.  

The detailed breakdown of the technical activities in this task are provided in the workstatement available here.