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Risk Targeted Hazard Spectra for Seismic Design in New Zealand

Session: Recent Engineering Uses of National Seismic Hazard Models II

Type: Oral

Date: 4/22/2021

Presentation Time: 06:00 PM Pacific

Description: 

The promotion of risk-targeted hazard spectra as the basis of seismic design internationally has increased over the past decade. Risk-targeted hazard spectra are derived through convolution of hazard curves with representative fragility functions and provide a means to target a uniform risk across a region. Using risk targets also allows performance objectives of building codes that are consistent with other life risks and enables societal input into the expected performance of structures. Risk-targeted hazard spectra are developed for New Zealand and proposed, with examples, to replace the existing uniform-hazard spectra for seismic design. This study also extends the risk-targeted hazard framework through full quantification of epistemic uncertainty in seismic hazard and includes multiple risk targets for individual and societal risk at the building and city scales. A framework is proposed which can be used to target a uniform seismic risk for buildings designed according to New Zealand standards considering both the performance of individual buildings as well as the performance of cities.

Presenting Author: Nick Horspool

Student Presenter: No

Authors