Floor Design Spectra Guideline

Date: February 20, 2013

Presenter: Andreas J. Felber, Ph.D., P.Eng. Specialist Structural Engineer, Generation Engineering, BC Hydro

Floor design spectra are used to design structures or components or evaluate equipment that is located on or within larger structures. Floor design spectra allow practical response spectral design of building components and equipment when multiple time history responses have been developed at various locations throughout a structure.

BC Hydro developed a practice to formalise the process of calculating floor design spectra to provide a uniform approach for seismic upgrades and designs of its facilities. Considerations in the practice’s development include: numbers and characteristics of input time histories; component damping; and the appropriate characterisation of uncertainty in the model from which the spectra are generated.

The seminar presents methodology used to develop floor spectra and illustrates this using recent examples for both large structures as well as electrical and mechanical equipment.

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