UC Berkeley Seismic Guidelines, Appendix II: Ground Motion TimeHistories for the UC Berkeley Campus

Lawrence Berkeley National Laboratory

关键词: Seismic Ground Motion Spectra;    Recommendations;    Ground Motion;    42;    Spectra Seismic Ground Motion Spectra;   

DOI  :  10.2172/923293
RP-ID  :  LBNL--62614
RP-ID  :  DE-AC02-05CH11231
RP-ID  :  923293

美国|英语

来源: UNT Digital Library

【 摘 要 】

Three sets of ten time histories each were developed to represent the ground motions for each of the three return periods. All of the time histories are provided as pairs of fault-normal and fault-parallel components. The ground motion time histories are provided in two forms: unmodified, and spectrally modified to match the probabilistic response spectra. The unmodified time histories can be scaled to match the probabilistic response spectra at a specified period, such as the first mode period of the structure being analyzed, while leaving the shape of the response spectrum unmodified. This approach preserves the particular characteristics of the individual time history, together with the peaks and troughs of its response spectrum. These individual characteristics are modified in the spectrally matched time histories, resulting in a suite of ten time histories (for a given return period) that all have the same response spectrum for a given component (fault normal or fault parallel) that follows the smooth shape of the probabilistic response spectrum.