Document: NUREG-0800
Document ID: 78905d69-1945-4638-99b9-2db68eb3da77
Document Type: srp
Title: SEISMIC SYSTEM ANALYSIS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070318.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.2
CFR Part: 
CFR Title: 

Content:
onse Spectra Procedures for developing the floor response spectra are reviewed to verify that they are in accordance with the acceptance criteria specified in subsection II.5 of this SRP section. If a modal response spectrum method of analysis is used to develop the floor response spectra, its conservatism compared to that of a time history approach is reviewed. 3.7.2-21 DRAFT Rev. 3 - April 1996 6. Three Components of Earthquake Motion The procedures by which the three components of earthquake motion are considered in determining the seismic response of structures, systems, and componentsSSCs are 56 reviewed to determine compliance with the acceptance criteria of subsection II.6 of this SRP section. 7. Combination of Modal Responses The procedures for combining modal responses (shears, moments, stresses, deflections, and accelerations) are reviewed to determine compliance with the acceptance criteria of subsection II.7 of this SRP section when a response spectrum modal analysis method is used. 8. Interaction of Non-Category I Structures with Category I Structures The design and analysis criteria for interaction of non-Category I structures with Category I structures are reviewed to ensure compliance with the acceptance criteria of subsection II.8 of this SRP section. 9. Effects of Parameter Variations on Floor Response Spectra The seismic system analysis is reviewed to determine whether the analysis considered the effects of expected variations of structural properties, dampings values , soil properties, 57 and soil-structure interactions on floor response spectra (e.g., peak width and period coordinates) and to determine compliance with the acceptance criteria of subsection II.9 of this SRP section. Among the various structural parameters analyzed, the effect of potential concrete cracking on structural stiffness should be addressed.58 10. Use of Equivalent Vertical Static Factors Use of constant static factors as response loads in the vertical direction for the