Design Optimization of Concrete Moment-Resisting Frames Considering Value of Seismic Consequences

This paper employs the value-based design framework for optimizing the seismic design of concretemoment-resisting frames. The framework incorporates a wide range of performance indicators into a singlevalue parameter. By directly integrating decision indicators into the design process, resources can beoptimally allocated to meet infrastructure needs. This study considers construction costs and the risk ofseismic consequences as key components of value. Seismic consequences, including repair costs, time,injuries, and casualties, are estimated using the FEMA-P۵۸ methodology. The Endurance Time method isemployed to efficiently estimate engineering demand parameters across various seismic hazard levels. Thisdesign procedure is applied to optimize two multi-story buildings and compare the results with conventionalcode-based designs, focusing on minimizing construction costs. The results reveal that the value-basedapproach significantly enhances the overall economic value of the structures studied, highlighting thesubstantial sub-optimality of code-based designs.

Keywords:

Seismic design , Seismic analysis , Endurance Time Method , Risk analysis , Life cycle costs