TEMPERATURE STRESSES IN PRESTRESSED CONCRETE WALLS OF CONTAINMENT STRUCTURES

摘要

style="text-align: left;">The walls of prestressed concrete tanks and containment structures are subject frequently to severe temperature differentials between the outside and inside surfaces. Thus, it becomes important that the temperature-induced moments and stresses in such structures be accurately determined so that the compensating prestressing force can be optimally evaluated. This paper presents an analytic method to  calculate these temperature stresses in a fully restrained prestressed concrete section. The method used is an iterative process whereby the section is considered cracked and the flexural rigidity of the  concrete is gradually reduced. From the computer output several design charts were prepared. To illustrate the design method and use of the charts, two numerical examples are included.  >References style="text-align: left;">1. Timoshenko, S., Theory of Plates and Shells, McGraw Hill Book Company, 1940. style="text-align: left;">2. ACI Committee 505, "ACI Standard Specifications for the Design and Construction of Reinforced Concrete Chimneys (ACI 505-54)," ACI Journal, Proceedings, Vol. 51, No. 1, September 1954, pp.  1-48. (Note that this ACI Standard has since been revised.)