Probabilistic Estimates of Acceleration Demands for Nonstructural Components Attached to Shear Wall Structures

摘要

The implementation of a probabilistic approach to quantify peak component acceleration (PCA) demands for acceleration-sensitive nonstructural components attached to structural wall models is presented. The proposed approach is useful to estimate PCA hazard curves and generate component uniform hazard spectra (CUHS) based on various structural and nonstructural parameters. CUHS are obtained for a family of structural wall structures with various characteristics for a site located in Los Angeles, CA. The results demonstrate that probabilistic estimates of PCA demands depend significantly on parameters such as the ratio of the period of the component to the fundamental period of the structure, the location of the component within the supporting structure, and the strength and stiffness of the supporting structure. In addition, the results from this study indicate that ASCE-7 estimates of component accelerations do not provide a consistent reliability level for NSCs with various periods that are attached to the structure at different locations. This highlights the importance of probabilistic seismic demand quantification approaches for the design and evaluation of nonstructural components.