Bond of 13 mm prestressing steel strands in pretensioned concrete members

Strengthening system using post-tension tendon with an internal anchorage of concrete members

“…The study presented variations in shear stresses along the thickness of the mortar layer and interfacial shear stress along the embedment length. Martí-Vargas et al [11][12][13] investigated the transmission and anchor length of pre-tensioned prestressed concrete members. Test specimens were made with seven-wire prestressing steel strands of 13 mm diameter.…”

Composite beam theory for pretensioned concrete structures with solutions to transfer length and immediate prestress losses

“…As the material properties and production process of both concrete and prestressing tendon evolved in the prestressing concrete industry, transfer length has been continuously investigated by a large number of studies. Russell [29][30][31], Barnes [32,33], Oh and Kim [35], Kim [34], Zia and Mostafa [36] and Marti-Vargas [37,38] all conducted tests on transfer length and discussed a number of factors that can influence transfer length. Peterman [39,40], Floyd et al [41] and Boehm et al [42] tested the transfer length of self-consolidating concrete structures and light weight concrete.…”

Experimental Technique for Measuring the Long‐term Transfer Length in Prestressed Concrete

“…The attachment of electrical resistance strain gauges to the prestressing reinforcement surface to know their stress profile (from the strain measurement by applying the modulus of elasticity of the prestressing reinforcement) is a widespread procedure, but it implies a undesired distortion of the reinforcement-concrete bond phenomenon. As an alternative to avoid this distortion for transfer length determination, a testing technique based on both the direct measurement and the analysis of the prestressing reinforcement force in specimen series with different embedment lengths has been conceived: the ECADA 1 test method [22], which feasibility has been verified for a short time analysis [23,24].…”