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http://dx.doi.org/10.12989/sem.2016.60.2.301

Time-dependent bond transfer length under pure tension in one way slabs  

Vakhshouri, Behnam (Centre for Built Infrastructure Research (CBIR), Faculty of Engineering and Information Technology (FEIT), University of Technology Sydney (UTS))
Publication Information
Structural Engineering and Mechanics / v.60, no.2, 2016 , pp. 301-312 More about this Journal
Abstract
In a concrete member under pure tension, the stress in concrete is uniformly distributed over the whole concrete section. It is supposed that a local bond failure occurs at each crack, and there is a relative slip between steel and surrounding concrete. The compatibility of deformation between the concrete and reinforcement is thus not maintained. The bond transfer length is a length of reinforcement adjacent to the crack where the compatibility of strain between the steel and concrete is not maintained because of partially bond breakdown and slip. It is an empirical measure of the bond characteristics of the reinforcement, incorporating bar diameter and surface characteristics such as texture. Based on results from a series of previously conducted long-term tests on eight restrained reinforced concrete slab specimens and material properties including creep and shrinkage of two concrete batches, the ratio of final bond transfer length after all shrinkage cracking, to THE initial bond transfer length is presented.
Keywords
bond transfer length; creep; shrinkage; pure tension; one way slab;
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