[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 P_dJZ((X  
engineer has been the effective peak ground acceleration. This number is comparatively P&q7|ST%N  
insignificant in displacement-based or performance-based seismic design, where the key data are e*!kZAf  
peak spectral response displacement, and the “corner” period at which this occurs. There appears ?8 {"x8W;  
to be a disagreement between seismologists on opposite sides of the Atlantic about these data, m3ff;,  
which the structural engineer views with concern, since ductile structural response will often be in {|\.i  
this region of the corner period. Dependable information on the reduction of displacement _wOt39e&  
response with damping or ductility is also needed for design approaches utilizing secant stiffness +)?J#g  
characterization. Other areas needing clarification include the issue of how to develop
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accelerograms for time-history analysis compatible with the design seismicity using an acceptably kR9-8I{J  
small number of accelerograms, and how to reconcile the statistical nature of seismicity qa6,z.mQ  
characterization with the structural engineer’s preference for deterministic analysis. There is some 66 Tpi![  
evidence that a consequence of this is invalid averaging of response characteristics by structural or]IZ2^n  
engineers.