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|Title:||Ten-year study on steel fiber-reinforced concrete beams under sustained loads|
|Authors:||Tan, K.H. |
|Citation:||Tan, K.H.,Saha, M.K. (2005-05). Ten-year study on steel fiber-reinforced concrete beams under sustained loads. ACI Structural Journal 102 (3) : 472-480. ScholarBank@NUS Repository.|
|Abstract:||Nine reinforced concrete beams with discrete steel fiber contents ranging from 0 to 2% were subjected to sustained flexural loading between 0.35 to 0.8 times the flexural capacity over a period of 10 years. The long-term deflections and maximum crack widths were found to decrease with increasing steel fiber content, with a reduction of 34 and 58%, respectively, at the end of the 10-year period in the case of the 2% fiber content. The deflections and crack widths were smaller for lower sustained loads. The modified ACI approach and effective modulus method predict the long-term deflections very well, while the adjusted effective modulus method slightly underestimates the same. Under four-point loading, the beams showed a reduced stiffness in the initial stage. After the previously sustained load level was attained, however, the beams exhibited essentially the same load-deflection characteristics as the corresponding ones that were not subjected to sustained loadings. Copyright © 2005, American Concrete Institute. All rights reserved.|
|Source Title:||ACI Structural Journal|
|Appears in Collections:||Staff Publications|
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