[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 4|#WFLo@  
engineer has been the effective peak ground acceleration. This number is comparatively >~+ELVB&  
insignificant in displacement-based or performance-based seismic design, where the key data are t.\dpBq  
peak spectral response displacement, and the “corner” period at which this occurs. There appears *EwR!L*  
to be a disagreement between seismologists on opposite sides of the Atlantic about these data, 0Z]!/AsC  
which the structural engineer views with concern, since ductile structural response will often be in ',5ky{  
this region of the corner period. Dependable information on the reduction of displacement YkQd  
response with damping or ductility is also needed for design approaches utilizing secant stiffness =zs`#-^8  
characterization. Other areas needing clarification include the issue of how to develop 1hNq8*|  
accelerograms for time-history analysis compatible with the design seismicity using an acceptably _/<x  
small number of accelerograms, and how to reconcile the statistical nature of seismicity n>U5R_T  
characterization with the structural engineer’s preference for deterministic analysis. There is some |)/aGZ+  
evidence that a consequence of this is invalid averaging of response characteristics by structural 2jCfT>`3  
engineers.