[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 ~dSr5LUD  
engineer has been the effective peak ground acceleration. This number is comparatively [Zrr)8A  
insignificant in displacement-based or performance-based seismic design, where the key data are XG?8s &  
peak spectral response displacement, and the “corner” period at which this occurs. There appears Fs{*XKv&lH  
to be a disagreement between seismologists on opposite sides of the Atlantic about these data, omFz@  
which the structural engineer views with concern, since ductile structural response will often be in ~[ F`"  
this region of the corner period. Dependable information on the reduction of displacement H.;Q+A,8^  
response with damping or ductility is also needed for design approaches utilizing secant stiffness \!(zrfP
{(  
characterization. Other areas needing clarification include the issue of how to develop E@\e$?*X  
accelerograms for time-history analysis compatible with the design seismicity using an acceptably LscGTs,  
small number of accelerograms, and how to reconcile the statistical nature of seismicity GB^Br6  
characterization with the structural engineer’s preference for deterministic analysis. There is some 5tnlrqC  
evidence that a consequence of this is invalid averaging of response characteristics by structural lFkR=!?=  
engineers.