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:
aximum 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) and (4) and the corresponding structural acceptance criteria of subsection II.5 of this SRP section should first be satisfied without Y , Y , and Y . When considering r j m these loads, local section strength capacities may be exceeded under these concentrated loads, provided there will be no loss of function of any safety-related system. Both cases of L having its full value or being completely absent should be checked.85 ciii. Load Combinations for Steel Structures Thermal loads can be neglected when it can be shown that they are secondary and self-limiting in nature. For steel interior structures, the 86 load combinations are acceptable if found in accordance with the following: (ia) For service load conditions, either the elastic working stress design methods for Part 1 of AISC N690, or the plastic design methods of Part 2 of AISC N690 , may be used. 87 (ai) If the elastic working stress design methods are used: (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 (bii) If the plastic design methods are used: (1) 1.7D + 1.7L 3.8.3-21 DRAFT Rev. 2 - April 1996 (2) 1.7D + 1.7L + 1.7E If thermal stresses due to T and R are present, the o o following combinations should also be considered: (3) 1.3 (D + L + T + R ) o o (4) 1.3 (D + L + E + T + R ) o o (iib) For factored load conditions, the following load combinations should be considered: (ai) If the elastic working stress design methods are used: (1) D + L + T + R + E' o o (2) D + L + T + R + P a a a (3) D + L + T + R + P + 1.0 (Y + Y + Y ) + E a a a r j m (4) D + L + T + R + P + 1.0 (Y + Y + Y ) + E' a a a r j m (bii) If the plastic design methods are used: (1) D + L + T + R + E' o o (2) D + L + T