Developing Performance-Based Design and Assessment Methods for Self-Centering Steel Braced Frames with Controlled Rocking
A number of studies have been carried out to develop rocking steel braced frames with post-tensioning rods and replaceable fuses. However, these studies have largely focused on performing large scale testing and developing computational models to simulate their response to earthquake ground motions. In contrast, comparatively much less has been accomplished in formulating performance-based design and assessment methods that can be used by practicing engineers to implement these systems in real buildings and quantify their benefits with regards to life cycle costs and sustainability.
This project will address this need by establishing performance-based design and assessment methods for self-centering steel braced frame systems with controlled rocking. Specific objectives include (1) developing performance-based design methodologies, (2) providing recommendations for design parameters used to control the occurrence and sequence of critical limit states, (3) formulating a capacity-design criteria for the force-controlled elements and (4) developing a stochastic service-life model that can be used to quantify the benefits, in terms of life cycle costs and environmental impacts, of implementing a controlled rocking braced frame system compared to other more traditional lateral force resisting systems.