NDLI: Experimental investigation on uniaxial tensile creep behavior of cracked steel fiber reinforced concrete

Content Provider	Springer Nature Link
Author	Zhao, Guanyu Prisco, Marco Vandewalle, Lucie
Copyright Year	2014
Abstract	This paper mainly investigates the uniaxial tensile creep behavior of pre-cracked steel fiber reinforced concrete. Hooked-end fiber RC65/60BN with fiber dosage of 80 kg/m$^{3}$ was used with normal strength concrete. A suitable tensile creep frame and a pre-cracking test set-up were developed. Cylindrical specimens were pre-cracked at crack opening displacement (COD) of 0.05 and 0.2 mm respectively before the tensile creep test. The pre-cracked specimens were loaded at a load level of 30 % of the maximum pre-cracking load $$P_{\max }$$ . The specimens were unloaded after 3 months and then reloaded to 60 % of $$P_{\max}$$ . Time dependent COD were continuously measured by LVDTs under constant temperature of 20° and relative humidity of 60 %. The measured time dependent COD $$W_{\rm total}$$ was considered as the summation of three parts, the irreversible part $$W_{\rm irr}$$ , the instantaneous part $$W_{\rm inst}$$ and the creep part $$W_{\rm creep}$$ . It was observed that $$W_{\rm irr}$$ and the loading level have a great impact on the tensile creep behavior. For the specimens with a pre-cracking COD of 0.05 mm, the maximum creep deformation $$W_{\rm creep}$$ is almost the same as the initial instantaneous deformation $$W_{isnt.}$$ after 3 months loading. For the specimens pre-cracked at 0.2 mm, the damage evolution at the fibre/matrix interface in terms of irreversible crack opening and load level is also discussed. It is interesting to be noted that the creep deformation under load level of 30 % will not introduce extra damage even though the $$W_{\rm irr}$$ increases.
Starting Page	3173
Ending Page	3185
Page Count	13
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	48
Issue Number	10
e-ISSN	18716873
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-08-12
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Steel fibre reinforced concrete Pre-cracking Tensile creep Irreversible crack opening Crack opening displacement Structural Mechanics Materials Science Theoretical and Applied Mechanics Operating Procedures, Materials Treatment Civil Engineering Building Materials
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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