Document: NUREG-0800
Document ID: 072325a8-02ea-4d59-bb3f-06592c340804
Document Type: srp
Title: The Aluminum Association, Specification for Aluminum Structures
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070327.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.4
CFR Part: 
CFR Title: 

Content:
o questions the energy absorption capability (deformation capability after yield) of such a high-strength anchor steel. Therefore, in addition to the position taken with regard to Section B.4.2 above, the staff will review vendor- or manufacturer-specific anchor bolt behaviors to determine the acceptable design margins between anchor bolt strengths and their corresponding pullout strengths based on concrete cones. Section B.5.1.1(a) - Lateral Bursting Concrete Strength This section states that the lateral bursting concrete strength is determined by the 45-degree concrete-failure-cone assumption. This assumption has not been confirmed by tests and the code committee is revising the assumption. The staff believes that the lateral bursting concrete strength determination also needs to be revised. To determine if adequate reinforcement against lateral bursting force needs to be determined on a case-by-case basis, the staff will review the following against test data: (1) the lateral bursting concrete strength provided by the concrete cover around anchor bolts and (2) the lateral bursting force created by the pulling of anchor bolts. 3.8.4-45 DRAFT Rev. 2 - April 1996 Section B.5.1.2.1 - Anchor, Studs, or Bars This section states that the concrete resistance for shear can be determined by a 45-degree half- cone to the concrete free surface from the centerline of the anchor at the shearing surface. Since the assumption for 45-degree concrete-failure cone for tension has not been proved, the staff believes that the use of the 45-degree half-cone for shear should be reexamined. In the meantime, the staff will review the adequacy of shear capacity calculations of concrete cones on a case-by-case basis with emphasis on methodology verification through vendor-specific test data. Section B.5.1.2.2(c) - Shear Lugs In this section, ACI states that the concrete resistance for each shear lug in the direction of a free edge shall be determined based on the 45-degree half-cone