[图书馆]SEISMOLOGICAL INFORMATION FOR DISPLACEMENT-BASED DESIGN [复制链接]

With conventional force-based seismic design, the most important information for the structural D6wg^'Q:  
engineer has been the effective peak ground acceleration. This number is comparatively Kq. MmR!gl  
insignificant in displacement-based or performance-based seismic design, where the key data are 7 g2@RKo  
peak spectral response displacement, and the “corner” period at which this occurs. There appears -kZOve|5  
to be a disagreement between seismologists on opposite sides of the Atlantic about these data, _Vj uQ  
which the structural engineer views with concern, since ductile structural response will often be in h
_{//W[  
this region of the corner period. Dependable information on the reduction of displacement Ait3KIJ9  
response with damping or ductility is also needed for design approaches utilizing secant stiffness PX%Y$`  
characterization. Other areas needing clarification include the issue of how to develop pl.D h  
accelerograms for time-history analysis compatible with the design seismicity using an acceptably ^.]]0Rp&  
small number of accelerograms, and how to reconcile the statistical nature of seismicity .&Rj2d  
characterization with the structural engineer’s preference for deterministic analysis. There is some Fy!-1N9|l  
evidence that a consequence of this is invalid averaging of response characteristics by structural }%m:^*@$9  
engineers.