349.1R-91: Reinforced Concrete Design for Thermal Effects on Nuclear Power Plant Structures (Reapproved 2000)

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Title: 349.1R-91: Reinforced Concrete Design for Thermal Effects on Nuclear Power Plant Structures (Reapproved 2000)

Author(s):

Publication: Technical Documents

Volume:

Issue:

Appears on pages(s): 30

Keywords: nuclear power plants

Date: 7/1/1991

Abstract:

Note: A newer version of this document exists. This document was replaced by 349.1R-07.

This report presents a design-oriented approach for considering thermal loads on reinforced concrete structures. Although the approach is intended to conform to the general provisions of Appendix A of ACI 349, it is not restricted to nuclear power plant structures. Two types of structures, frames and axisymmetric shells, are addressed. For frame structures, a rationale is described for determining the extent of member cracking which can be assumed for purposes of obtaining the cracked structure thermal forces and moments. Stiffness coefficients and carry-over factors are presented in graphical form as a function of the extent of member cracking along its length and the reinforcement ratio. Fixed-end thermal moments for cracked members are expressed in terms of these factors.