Probabilistic Seismic Response Models for Risk Assessment and Design of Steel Moment Frames with Linear Viscous Dampers

Abstract

The use of supplemental viscous damping significantly improves the seismic performance of buildings; however, a design procedure that considers seismic risk is necessary. The aim of this article is to simplify the seismic risk assessment of mid-rise steel frames with linear viscous fluid dampers by employing probabilistic models and a reliability analysis. The development of a probabilistic seismic response model (PSRM) to predict the structural response without performing extensive computation is a principal component of this methodology. The design and modeling of generic frames, record selection, cloud analysis, assessment of candidate intensity measures, and use of vector-valued intensity measures are the primary aspects of this study, the goal of which is to put forward a PSRM for the target frames. Comparison of the PSRM outcome with the results of case studies demonstrates the acceptable accuracy of the models for the design earthquake; these models lead to a reduction in the computation and complexity involved in selecting design variables to achieve a target risk.