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Response spectral attenuation relations for shallow crustal earthquakes in Taiwan
Abstract In this study, a local set of response spectral attenuation equations, developed for seismic hazard analysis in Taiwan, are introduced as an example for determining the local strong motion attenuation relationship for a region. Strong ground-motion data for shallow crustal earthquakes are obtained from the Taiwan Strong-motion Instrumentation Program (TSMIP). These data are used to establish peak ground acceleration (PGA) and response spectral acceleration (SA) attenuation equations taking into consideration both hanging-wall effects and site conditions. The obtained results show that the local set of attenuation equations gives significantly lower values of PGA and SA for structural periods shorter than 0.3s as compared to a set of global relations obtained from international data. The SAs obtained for structural periods longer than 0.3s are similar to those obtained for global sets. This indicates that developing a local set of ground-motion attenuation equations is necessary for more accurate prediction of ground motion values.
Research highlights ► A local set of response spectral attenuation equations is necessary for more accurate prediction of ground motion values. ► The local attenuation is faster than NGA models for short period motions. ► Faster attenuation may be a character in a young orogen like in Taiwan. ► The 1981 Campbell form is still valid for use in this Taiwan case except soil de-amplification under large strain is not considered.
Response spectral attenuation relations for shallow crustal earthquakes in Taiwan
Abstract In this study, a local set of response spectral attenuation equations, developed for seismic hazard analysis in Taiwan, are introduced as an example for determining the local strong motion attenuation relationship for a region. Strong ground-motion data for shallow crustal earthquakes are obtained from the Taiwan Strong-motion Instrumentation Program (TSMIP). These data are used to establish peak ground acceleration (PGA) and response spectral acceleration (SA) attenuation equations taking into consideration both hanging-wall effects and site conditions. The obtained results show that the local set of attenuation equations gives significantly lower values of PGA and SA for structural periods shorter than 0.3s as compared to a set of global relations obtained from international data. The SAs obtained for structural periods longer than 0.3s are similar to those obtained for global sets. This indicates that developing a local set of ground-motion attenuation equations is necessary for more accurate prediction of ground motion values.
Research highlights ► A local set of response spectral attenuation equations is necessary for more accurate prediction of ground motion values. ► The local attenuation is faster than NGA models for short period motions. ► Faster attenuation may be a character in a young orogen like in Taiwan. ► The 1981 Campbell form is still valid for use in this Taiwan case except soil de-amplification under large strain is not considered.
Response spectral attenuation relations for shallow crustal earthquakes in Taiwan
Lin, Po-Shen (author) / Lee, Chyi-Tyi (author) / Cheng, Chin-Tung (author) / Sung, Chih-Hsuan (author)
Engineering Geology ; 121 ; 150-164
2011-04-28
15 pages
Article (Journal)
Electronic Resource
English
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