Title:
Chimney Design for Two Layers of
Reinforcement and Concentrated Corbel Moments
Author(s):
Marius Diver and Robert W. Pierce
Publication:
Journal Proceedings
Volume:
70
Issue:
10
Appears on pages(s):
701-708
Keywords:
bending moments: chimneys: compressive strength; loads (forces): modulus of elasticity: reinforced concrete: reinforcing steels; specifications: structural analysis; structural design; temperature: tensile stress: wind pressure.
DOI:
10.14359/11241
Date:
10/1/1973
Abstract:
ACI 307-69 is a most valuable document, but it is lacking in two important aspects of modern design of large chimneys. These limitations are that it treats only the case of a single layer of reinforcing, and that it provides no means of incorporating the effects of locally concentrated corbel moments into a general design. This paper expands the standard to incorporate two layers of reinforcing, and introduces an extra loading case, resulting from corbel moments. Final expressions are given in a form comparable to that in ACI 307-69, and these are expressed graphically where it is valuable to do so. A flow chart and a fully worked example are also presented to illustrate utilization of the method proposed. This method differs from that used in ACI 307-69 primarily in that a clear distinction is made between various states of stress of a design section, to facilitate a simple superposition of loading cases under commonly encountered design situations.