Vector-valued uniform hazard spectra

Uniform hazard spectra (UHS) have been used as design earthquakes in several design codes. However, as the results from scalar probabilistic seismic hazard analysis (PSHA), UHS do not provide knowledge about the simultaneous occurrence of spectral accelerations at multiple vibration periods. The con...

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Bibliographic Details
Published in:Earthquake spectra 2012-11, Vol.28 (4), p.1549-1568
Main Authors: Ni, Shun-Hao, Zhang, De-Yi, Xie, Wei-Chau, Pandey, Mahesh D
Format: Article
Language:English
Subjects:
acceleration
construction
Earth sciences
Earth, ocean, space
earthquakes
Earthquakes, seismology
Engineering and environment geology. Geothermics
Engineering geology
Exact sciences and technology
geologic hazards
Internal geophysics
magnitude
natural hazards
Natural hazards: prediction, damages, etc
numerical analysis
probability
seismicity
Seismology
spectra
spectral analysis
statistical analysis
vibration
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Summary:Uniform hazard spectra (UHS) have been used as design earthquakes in several design codes. However, as the results from scalar probabilistic seismic hazard analysis (PSHA), UHS do not provide knowledge about the simultaneous occurrence of spectral accelerations at multiple vibration periods. The concept of a single "design earthquake" is then lost on a UHS. In this study, a vector-valued PSHA combined with scalar PSHA is applied to establish an alternative design spectrum, named vector-valued UHS (VUHS). Vector-valued seismic hazard deaggregation (SHD) is also performed to determine the design earthquake in terms of magnitude, distance, and occurrence rate for the VUHS. The proposed VUHS preserves the essence of the UHS and can also be interpreted as a single design earthquake. To simplify the procedure for generating the VUHS, so that they can be easily incorporated into performance-based seismic design, an approximate method is also developed.
ISSN:8755-2930
1944-8201
DOI:10.1193/1.4000081