•A Database for Modeling of Post-Buckling Behavior and Fracture of Steel Braces
•Case #1: E-Defense Dynamic Testing
•Case #2: 2-Story Chevron Braced Frame
•Summary and Observations
In the context of Performance-Based Earthquake Engineering, collapse constitutes a limit state associated with complete loss of a building and its content.
Understanding collapse is a fundamental objective in seismic safety since this failure mode is associated with loss of lives.
Therefore, there is a need for reliable prediction of the various collapse mechanisms of buildings subjected to earthquakes.
1.In the case of steel braced frames, one challenge for reliable collapse assessment is to accurately model the post-buckling behavior and fracture of steel braces as parts of a braced frame.
2.Another challenge is to consider other important deterioration modes associated with plastic hinging in steel components that are part of local story mechanisms that develop after the steel braces fractureà This could be an issue for steel braced frames designed in moderate or high seismicity regions.