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Building period limitation

Building period limitation

Building period limitation

What is the rationale regarding the building period limitation in reference to any building code (i.e. ASCE 7-95 eq. times Cu from table, ASCE 7-98 eq. times Cu from table, UBC 97 Method B can only be 30% to 40% greater than eq. 30-8 depending on the seismic zone).  Part b of my question is how does this relate (if there is any relationship) to high-rise structure?  Thanks

RE: Building period limitation

It is essentially a minimum force limit and a recognition that the calculation of the fundamental period of an actual building structure versus is true period can be wildly different.  

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