Behavior of RC Beams under Sustained Load

by Jianguo Nie, Tsinghua Univ, Beijing, China,
Jumin Shen, Tsinghua Univ, Beijing, China,



Document Type: Proceeding Paper

Part of: Structures Congress XII

Abstract:

Experimental results of eight reinforced concrete beams under 3-month's sustained load, with the ratio of shear span to depth equal to 2.5, are reported. It is shown by tests that the diagonal crack develops in width and length with time for RC beams dominated by shear. Semi-empirical formulae are proposed for predicting the time-dependent growth of diagonal crack width and the long-term diagonal crack width. The calculated values are generally in good agreement with the measured results.

Subject Headings: Concrete beams | Reinforced concrete | Cracking | Load factors | Shear stress | Load tests | Time dependence

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