[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 o!A+&{  
engineer has been the effective peak ground acceleration. This number is comparatively A2Gevj?F$  
insignificant in displacement-based or performance-based seismic design, where the key data are [`7ThHX  
peak spectral response displacement, and the “corner” period at which this occurs. There appears 3)ywX&4"L  
to be a disagreement between seismologists on opposite sides of the Atlantic about these data, $-sHWYZ  
which the structural engineer views with concern, since ductile structural response will often be in qY!Zt_Be6  
this region of the corner period. Dependable information on the reduction of displacement #KZBsa@p  
response with damping or ductility is also needed for design approaches utilizing secant stiffness }&D32\  
characterization. Other areas needing clarification include the issue of how to develop #AQV(;r7@  
accelerograms for time-history analysis compatible with the design seismicity using an acceptably (<C3Vts))  
small number of accelerograms, and how to reconcile the statistical nature of seismicity I b5rqU\  
characterization with the structural engineer’s preference for deterministic analysis. There is some 9djk[ttA)  
evidence that a consequence of this is invalid averaging of response characteristics by structural TarY|P7_  
engineers.