For anyone even remotely interested in what goes into reinforcing new or existing structures for seismic loads, check out the links below. Really excellent, clear examples and illustrations.
http://www.abag.ca.gov/bayarea/eqmaps/fixit/ch1/sld001.htm
http://www.abag.ca.gov/bayarea/eqmaps/fixit/ch2/sld001.htm
http://www.abag.ca.gov/bayarea/eqmaps/fixit/ch3/sld001.htm
http://www.abag.ca.gov/bayarea/eqmaps/fixit/ch4/sld001.htm
http://www.abag.ca.gov/bayarea/eqmaps/fixit/ch5/sld001.htm
http://www.abag.ca.gov/bayarea/eqmaps/fixit/ch6/sld001.htm
http://www.abag.ca.gov/bayarea/eqmaps/fixit/ch7/sld001.htm
http://www.abag.ca.gov/bayarea/eqmaps/fixit/ch8/sld001.htm
