Document: NUREG-0800
Document ID: ab4f353d-c299-479d-ab25-834f97196988
Document Type: srp
Title: CONCRETE AND STEEL INTERNAL STRUCTURES OF STEEL OR CONCRETE
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070326.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.3
CFR Part: 
CFR Title: 

Content:
ideration of such loads should be as indicated in the Appendix to SRP Section 3.8.1 fluid structure interaction associated with these hydrodynamic loads and those from earthquakes should be taken into account. 3.8.3-19 DRAFT Rev. 2 - April 1996 bii. Load Combinations for Concrete Structures For concrete interior structures, the load combinations are acceptable if found in accordance with the following: (ia) For service load conditions, either the working stress design (WSD) method as outlined in the ACI 318 (Reference 6)82 Code or the strength design method may be used. (ai) If the WSD method is used, the following load 83 combinations should be considered: (1) D + L (2) D + L + E If thermal stresses due to T and R are present, the following combinations should be also considered: (3) D + L + T + R o o (4) D + L + T + R + E o o Both cCases of in which L havinghas its full value or beingis completely absent should be checked. 84 (bii) If the strength design method is used, the following load combinations should be considered: (1) 1.4D + 1.7L (2) 1.4D + 1.7L + 1.9E If thermal stresses due to T and R are present, the following combinations should also be considered: (3) (0.75)(1.4D + 1.7L + 1.7T + 1.7R ) o o (4) (0.75)(1.4D + 1.7L + 1.9E + 1.7T + 1.7R ) o o (iib) For factored load conditions, which represent extreme environmental, abnormal, abnormal/severe environmental, and abnormal/extreme environmental conditions, the strength design method should be used and the following load combinations should be considered: (1) D + L + T + R + E' o o DRAFT Rev. 2 - April 1996 3.8.3-20 (2) D + L + T + R + 1.5P a a a (3) D + L + T + R + 1.25P + 1.0[(Y + Y + Y ] + 1.25E a a a r j m (4) D + L + T + R + 1.0P + 1.0[(Y + Y + Y ] + 1.0E' a a a r j m In combinations (2), (3), and (4) the maximum values of P , T , R , a a a Y , Y , and Y , including an appropriate dynamic load factor, j r m should be used unless a time-history analysis is performed to justify otherwise. Combinations (3)