[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 bxhg*A  
engineer has been the effective peak ground acceleration. This number is comparatively `zzKD2y  
insignificant in displacement-based or performance-based seismic design, where the key data are h/X5w4  
peak spectral response displacement, and the “corner” period at which this occurs. There appears U.hERe~X  
to be a disagreement between seismologists on opposite sides of the Atlantic about these data, k$-~_^4m  
which the structural engineer views with concern, since ductile structural response will often be in n,?IcDU~m  
this region of the corner period. Dependable information on the reduction of displacement N;x<| %peL  
response with damping or ductility is also needed for design approaches utilizing secant stiffness oWx_O-_._  
characterization. Other areas needing clarification include the issue of how to develop ~C"k$;(n  
accelerograms for time-history analysis compatible with the design seismicity using an acceptably y  KYP  
small number of accelerograms, and how to reconcile the statistical nature of seismicity lsB9;I^+x  
characterization with the structural engineer’s preference for deterministic analysis. There is some \>Ga-gv6/  
evidence that a consequence of this is invalid averaging of response characteristics by structural &vFqe,Z  
engineers.