Quantcast Ground Motion - aeg_sw0088

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Capacities of APA Rated Structural-Use Panels" (Technical Note Number N375B)
dated June 1995.
Seismic design shall comply with the requirements of the US Army Corps of Engineers
publication TI 809-04 "Seismic Design for Buildings" dated December 1998. This
publication is based on and must be used in conjunction with the "NEHRP Recommended
Provisions for Seismic Regulations for New Buildings and Other Structures" (FEMA 302)
1997 edition. TI 809-04 uses Performance Based Engineering (PBE) analysis and
design principles which are based on the ATC methods published in the "NEHRP
Guidelines for the Seismic Rehabilitation of Buildings" (FEMA 273).
a. All design must be performed using "strength design / LRFD" procedures.
b. Note that a peer review in accord with section 1-10 of TI 809-04 is required for the
design of hazardous facilities (seismic use group III H) and for essential facilities
(seismic use group III E.)
c. Design for enhanced performance (seismic use groups II and III) shall not
produce a design with members lighter than would result from a "standard
occupancy" (seismic use group I) design using importance factors of 1.5 for group III
and 1.25 for group II.
d. Designs for "Immediate Occupancy" (seismic use group IIIE) are highly
dependent on continued function of building utility systems. It is expected that
such designs will involve a major effort to assure the continued operation of
these utility systems. Ground Motion: Geotechnical (Soils Investigation) reports shall contain a
determination of the "Site Class" as defined in Table 3-1 of TI 809-04 or section
(Site Class Definitions) of FEMA 302. Determination of Fa and Fv shall not be made
without a geotechnically established site class. Minor projects that do not require
geotechnical investigation reports may be designed to the FEMA 302 default site class D.
a. Site-specific determination of seismic ground motion shall be based on the
guidelines presented in chapter 3-4 of TI 809-04. Note that a peer review is required
for site specific ground motion determination as defined in section 3-4.b of TI 809-04.
b. Refer to section 3.6 of the A-E Guide for additional information on site specific
ground motion representation.


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