Analysis of bond stress distribution for prestressing strand by Standard Test for Strand Bond

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

“…However, the bond-slip relationship at the tendon-concrete interface is a complicated matter. It has been reported by a number of studies [74][75][76]80] that, depending on the slip, the bond-slip relationship between concrete and prestressing tendon could exhibit nonlinear behaviors as in Fig. 2.…”

“…For example, Gupta and Maestrini [72] derived governing equations for the steel reinforcement bars in the pull-out test. Den Ujil [73] and Dang et al [74] presented empirical bond-slip models for prestressing strand based on pull-out test results, and fib (Fédération Internationale du Béton) [75,76] suggested a piecewise equation that intends to provide statistical mean curves of the bond-slip relationship. The bond-slip models usually start with an ascending component to the maximum bond stress, which is eventually followed by a to sh e a r co n ce n tr a tio n Pla ne sec tion vali d T ra n sf e r zo ne ac ts a s te nd o n a n ch or ag e Effective axial force Interface shear flow Strain profile descending branch.…”

Spacing requirements of 0.7 in. (18 mm) diameter prestressing strands

“…diameter strands. A limited number of studies [18][19][20] have examined these parameters along with the mechanical properties and surface conditions of the strands used for the two bridges in Nebraska and for research recommendations.…”

Influence of cyclic loading and frost on the behavior of bond of three‐wire strand

“…The scientists have proposed different equations with different empirical coefficients for bond stress–slip relationship of deformed bars . However, there is little research on bond stress–slip relationship of the strand and especially there is a lack of studies of bond under the influence of cyclic loading and environmental impacts (frost). Therefore, the main purpose of this article is to investigate the behavior of the strand affected by static and cyclic loading, freezing and thawing cycles and to propose the dynamic parameters which describe bond under the influence of cyclic loading.…”