Document: NRC Regulatory Guide
Document ID: a03860d0-46a2-4c53-b0e5-9398a146bf12
Document Type: regulatory_guide
Title: Safety-Related Steel Structures and Steel-Plate Composite
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2033/ML20339A558.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.243
CFR Part: 
CFR Title: 

Content:
uld affect the integrity of the structure as a whole. 11.1.7. For shear-controlled SC walls with yielding reinforcement spaced at section thickness divided by two or smaller, the ductility ratio is no greater than 1.3. For shear-controlled SC walls with other configurations of yielding or nonyielding reinforcement, the ductility ratio is limited to 1.0. 11.1.8. The shear strength under local loads considers reaction shear at the supports and punching shear adjacent to the load. 11.1.8.1. Local loads may be impulsive or impactive, except that, for impactive loads, satisfaction of criteria for perforation should be used in place of punching shear requirements. 11.1.8.2. The shear strength is determined in accordance with the provisions in Section N9.3, on the design of SC walls, of N690-18, using the appropriate dynamic increase factors in Table A-N9.1.1 for the required concrete and steel material properties. DG-1304. Page 13 11.1.8.3. In the case of the reaction shear (beam action condition) at the supports, the effective width of the critical section for the shear beam capacity at the supports is to be determined according to the zone of influence induced by the local loads instead of the entire width of the support. The zone of influence induced by the concentrated loads may be determined, for example, by an analysis (Ref. 29). 11.1.9. Design of SC walls or SC structural wall systems for impactive loads should meet the criteria for local effects and overall structural response. The overall structural response is determined by the methods for impulsive loads in Section N.9.1.6c. Local effects include penetration, perforation, and punching shear. The penetration depth and required concrete and faceplate thickness required to prevent penetration are from applicable rational methods or pertinent test data. 11.1.10. Evaluation of loads from malevolent, beyond-design-basis, aircraft impacts are within the scope of RG 1.217 and are outside the scope of this RG. 11.2.