[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 ]C{N4Ni^Z  
engineer has been the effective peak ground acceleration. This number is comparatively Nw%^Gs<~  
insignificant in displacement-based or performance-based seismic design, where the key data are mRN[lj  
peak spectral response displacement, and the “corner” period at which this occurs. There appears # wyjb:Ql  
to be a disagreement between seismologists on opposite sides of the Atlantic about these data, +-rSO"nc  
which the structural engineer views with concern, since ductile structural response will often be in 5acC4v!T  
this region of the corner period. Dependable information on the reduction of displacement zoBp02j  
response with damping or ductility is also needed for design approaches utilizing secant stiffness VBW][f  
characterization. Other areas needing clarification include the issue of how to develop XANJA  
accelerograms for time-history analysis compatible with the design seismicity using an acceptably sX
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small number of accelerograms, and how to reconcile the statistical nature of seismicity iH>b"H>  
characterization with the structural engineer’s preference for deterministic analysis. There is some UJjtDV3@_g  
evidence that a consequence of this is invalid averaging of response characteristics by structural B_C."{
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engineers.