Effects of anchorage hardware on the cyclic tensile response of unbonded monostrands
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This paper presents an investigation of the cyclic tensile response of monostrand-anchor systems, that is, unbonded monostrands including their anchorage hardware. Cyclic tensile testing was conducted for 0.5 in. (13 mm) and 0.6 in. (15 mm) diameter monostrand-anchor systems to fracture of all wires. All monostrands were Grade 270 (1860 MPa), cold-drawn, seven-wire, low-relaxation cables. Major findings of this experimental study include the following: premature failure of monostrand-anchor systems (for strains in the range of 1.5% to 4%) in the form of fracture of a single wire; successive fracture of monostrand wires (one at a time) with the applied extension, as opposed to the nearly simultaneous fracture of all wires in anchor-free monostrands; and differences between the loading and unloading/reloading stiffness of monostrand-anchor systems due to the seating and sliding of the wedges of the anchorage hardware. A numerical model was developed that is capable of capturing the basic characteristics of the observed experimental response. The numerical results are in good agreement with the experimental data.
author list (cited authors)
Sideris, P., Aref, A. J., & Filiatrault, A.
complete list of authors
Sideris, Petros||Aref, Amjad J||Filiatrault, Andre