[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 Af}o/g  
engineer has been the effective peak ground acceleration. This number is comparatively |<uBJ-5  
insignificant in displacement-based or performance-based seismic design, where the key data are \~l"  
peak spectral response displacement, and the “corner” period at which this occurs. There appears |+qsO;  
to be a disagreement between seismologists on opposite sides of the Atlantic about these data, `$3ktQ$  
which the structural engineer views with concern, since ductile structural response will often be in !=u=P9I  
this region of the corner period. Dependable information on the reduction of displacement ST,+]p3L(  
response with damping or ductility is also needed for design approaches utilizing secant stiffness gJ>#HEkMB  
characterization. Other areas needing clarification include the issue of how to develop moZeP#Q%  
accelerograms for time-history analysis compatible with the design seismicity using an acceptably 59~mr:*sF  
small number of accelerograms, and how to reconcile the statistical nature of seismicity :`uu[^  
characterization with the structural engineer’s preference for deterministic analysis. There is some f*VXg[&\\F  
evidence that a consequence of this is invalid averaging of response characteristics by structural HmHM#~5(`  
engineers.