[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 m7|S'{+!  
engineer has been the effective peak ground acceleration. This number is comparatively 8xb({e4  
insignificant in displacement-based or performance-based seismic design, where the key data are =.]{OT  
peak spectral response displacement, and the “corner” period at which this occurs. There appears 7$JOIsM  
to be a disagreement between seismologists on opposite sides of the Atlantic about these data, bIXD(5y
 
which the structural engineer views with concern, since ductile structural response will often be in ]^0mh["  
this region of the corner period. Dependable information on the reduction of displacement 7NMy1'-q  
response with damping or ductility is also needed for design approaches utilizing secant stiffness ANRZQpnXQ  
characterization. Other areas needing clarification include the issue of how to develop DP.Y<V)B  
accelerograms for time-history analysis compatible with the design seismicity using an acceptably 6W/uoH=;  
small number of accelerograms, and how to reconcile the statistical nature of seismicity ^ AJ_  
characterization with the structural engineer’s preference for deterministic analysis. There is some 2w;Cw~<=d  
evidence that a consequence of this is invalid averaging of response characteristics by structural MAcjWb~f  
engineers.