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Title: Temperature Effects in ACI 307, ACI 349, and ACI 359

Author(s): Sungjin Bae

Publication: Structural Journal

Volume: 111

Issue: 5

Appears on pages(s): 1135-1146

Keywords: containment; temperature; thermal; thermal gradient; thermal strain

Date: 9/1/2014

Abstract:
Consideration of temperature effects is important for designing concrete structures such as chimneys, nuclear structures, and liquefied gas containments. Internal stresses due to temperature changes need to be estimated and accounted in design loads or design strengths. These internal stresses vary with cracking of concrete, yielding of reinforcement, and restraint conditions and, thus, accurate estimates of internal stresses due to temperature changes involve complicated analysis procedures. Due to the complexity of the problem, ACI 307-08, ACI 349-06, and ACI 359-10 have developed different design approaches for temperature effects. The objective of this study is to examine these design approaches and evaluate their performance on estimating thermal effects. The influence of axial forces on thermal effects is discussed, and recommendations are made.




  

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