Seismic Response Modification Coefficient, R
Seismic Response Modification Coefficient, R
(OP)
Per ASCE/SEI 7-05, table 12.14-1, what is the response modification coefficient for one story steel framed building with ordinary steel moment frames (no cross braces used)? Also, how do we define concentrically and eccentrically braced fames?






RE: Seismic Response Modification Coefficient, R
An eccentrically braced frame will have the brace frame at a beam with an eccentricity to the column. The mechanism of energy dissipation is through the yielding and cyclic behavior of this link
RE: Seismic Response Modification Coefficient, R
Looks like you have to use the 3.5 value listed in Table 12.2-1(C4) and use the Equivlent Force Method or otherwise.
Mike McCann
MMC Engineering
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