Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Seismic demand on structures may be estimated using linear response spectrum analysis, linear response history analysis, or nonlinear response history analysis. For response history analysis, a set of ground motion record pairs is required. Requirements for nonlinear analysis in current standards typically include development of a set of at least 11 record pairs scaled to a maximum direction target response spectrum. For site-specific ground motion studies, the current standard also specifies a target logarithmic standard deviation of pseudo-spectral acceleration equal to 0.60 across all periods of significance. The purposes of this study include (1) a demonstration that geometric-mean-based scale factors and maximum-direction-based scale factors for design record suites are similar as long as the engineer is aware of the target spectrum basis, (2) an estimation of log-based variability in inelastic displacements for design suites with a target log-based variability in pseudospectral acceleration, and (3) a brief analysis of the directional combination rule typically used in seismic design. To accomplish these goals, a site near Memphis, Tennessee, in the New Madrid seismic zone was selected. The deep soil deposits characterizing the selected site warrant the consideration of site-specific site factors.
Seismic demand on structures may be estimated using linear response spectrum analysis, linear response history analysis, or nonlinear response history analysis. For response history analysis, a set of ground motion record pairs is required. Requirements for nonlinear analysis in current standards typically include development of a set of at least 11 record pairs scaled to a maximum direction target response spectrum. For site-specific ground motion studies, the current standard also specifies a target logarithmic standard deviation of pseudo-spectral acceleration equal to 0.60 across all periods of significance. The purposes of this study include (1) a demonstration that geometric-mean-based scale factors and maximum-direction-based scale factors for design record suites are similar as long as the engineer is aware of the target spectrum basis, (2) an estimation of log-based variability in inelastic displacements for design suites with a target log-based variability in pseudospectral acceleration, and (3) a brief analysis of the directional combination rule typically used in seismic design. To accomplish these goals, a site near Memphis, Tennessee, in the New Madrid seismic zone was selected. The deep soil deposits characterizing the selected site warrant the consideration of site-specific site factors.
Importance of Target Spectrum Basis in Earthquake Ground Motion Scaling
Huff, Tim (Autor:in)
30.09.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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