By Structural Engineering Institute
ASCE/SEI 43-05 presents stringent layout standards for nuclear amenities. as a result capability danger linked to nuclear dangers, it truly is fascinating that nuclear amenities have a reduce chance that structural harm can be because of earthquake than do traditional amenities. The aim of this normal is to make sure that nuclear amenities can stand up to the consequences of earthquake flooring shaking with wanted functionality. This normal should be of use to any designers or analysts considering the layout of latest nuclear constructions, structures, or elements. issues comprise: • review of Seismic call for • assessment of Structural ability • Load combos and recognition standards for buildings • Ductile Detailing necessities • gear and Distribution structures • and Seismic caliber Provisions
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Extra info for American Society of Civil Engineers seismic design criteria for structures, systems, and components in nuclear facilities
2 Except as discussed in note 3, below, the allowable behavior limits for passive components are based on the ASME B&PVC, Section III, allowables for Service Level D. 0 y. 0 y. 1, below. 0. The calculated seismic response of the component, DS, shall be based on its effective natural frequency, fe, as defined in Eq. 1. When displacements need to be calculated as part of the seismic qualification by analysis, the demand given in Eq. (8-1) shall be changed by replacing DS/F with DS. 3 Capacity Using Qualification by Analysis The following subsections define the capacity, C, of equipment and distribution systems when seismic qualification is based on analysis methods.
Median-centered analysis techniques shall be used so as to predict “best-estimate” values of sliding distance and rocking angle. These “best-estimate” values shall be increased by the following Factors of Safety (FS) in order to obtain design values of sliding and rocking: Vn ϭ 20͙ෆ fЈc Aj for interior slab/wall joints Vn ϭ 12͙ෆ fЈc Aj for exterior slab/wall joints where Aj is the effective cross-sectional area within a joint as defined in Chapter 21 of ACI 349. Beams and columns, which comprise portions of the slab/wall frame, shall be detailed in accordance with Section 21 of ACI 349.
The coefficient of friction is determined from geotechnical investigations. In the absence of such information, may be based on the minimum of the effective internal friction angle of the soil and the friction coefficient between soil and foundation from published references. The passive pressure (Eq. 2 Building Overturning The acceptance criteria for overturning consists of a two-level check, which recognizes that the overturning moment from a fixed-base analysis is conservative. If the restoring moment exceeds the overturning moment, a fixed-base analysis provides a reasonable estimate of the soil pressure.
American Society of Civil Engineers seismic design criteria for structures, systems, and components in nuclear facilities by Structural Engineering Institute