Simplified Method for Performance-Based Desing of Non-Structural Components

Abstract eng:
Undesirable seismic performance or failure of non-structural components (NSCs) during earthquakes is reported as a major portion of seismic economic loss. To prevent or reduce earthquake induced damage in NCSs sufficient resistance must be provided. In a performance-based design framework, the required seismic design force is determined according to the predefined performance criteria. Depending on the type of NSC, the performance criteria could be either an acceleration or displacement limit. Hence, a floor horizontal acceleration or displacement response spectra is needed to determine the forces generated in the NSCs. This paper describes a novel analytical approach to derive earthquake-induced floor spectra in a regular building. The influence of the nonlinear behaviour of the primary structure on the floor spectra is included in the proposed simple method to provide an improved estimate. The general approach is based on representing the structure as equivalent single degree of freedom (SDOF) systems considering a first non-linear mode and the other predominantly elastic higher modes. Results obtained from nonlinear time-history analysis are compared with the simplified method proposed. The developed floor response spectra is a start point to develop a simplified performancebased design procedure for NSCs .

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