Flow Hardening Method of Creep Analysis of In Situ Reinforced Concrete Columns

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Title: Flow Hardening Method of Creep Analysis of In Situ Reinforced Concrete Columns

Author(s): R. N. Swamy and P. Arumugasaamy

Publication: Journal Proceedings

Volume: 77

Issue: 3

Appears on pages(s): 153-160

Keywords: columns (supports); creep properties; creep tests; deformation; drying shrinkage; field tests: multistory buildings; reinforced concrete; strains; stresses, temperature.

Date: 5/1/1980

Abstract:
This paper presents a new method of creep analysis of in situ reinforced concrete columns in service. The prediction of creep is based on a single creep curve obtained on a specimen loaded at 28 days under controlled environment, the known stress history of the columns and correction factors for age at loading, size of member, and percentage of reinforcement. The predicted values are compared with measured strains in several columns of an eight-story reinforced concrete framed structure over a period of 10 years. The field measurements are based on extensive instrumentation of the columnsand the use of a stress meter to monitor the actual loading on the columns. It is shown that the flow hardening method predicts creep, inelastic, and total strains well.