Shear fatigue of the bonded and frictional interface under constant normal pre-stress

Hurme, Susanna; Marquis, Gary

doi:10.1016/j.ijfatigue.2014.08.014

Cited by 2 publications

(1 citation statement)

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“…Existing empirical formulas are employed to estimate pre-stress loss caused by elastic shortening, creep, shrinkage, friction, relaxation of the pre-stressed tendon and temperature [5][6][7][8][9]. Numerous factors influence the pre-stress loss of CLS concrete, including the type of cement, aggregates used, the mix of concrete, etc.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis on Pre-Stress Friction Loss of Crushed Limestone Sand Concrete Beams

Xiao

Zhang

et al. 2018

Applied Sciences

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This paper presents an experimental research work that evaluates the pre-stress loss caused by friction in crushed limestone sand (CLS) concrete members with post-tensioning. A total of 26 full-scale pre-stressed concrete beams were constructed and tested for the friction loss experiment. The considered variables mainly included the duct-forming materials, wires of tendons and arrangement of ducts. The tensile forces at both active and passive ends of specimen were recorded by steps, and then the pre-stress friction loss for each case was calculated. The result shows that the proportion of pre-stress friction loss in specimen with multi-wire tendons is in the range of 10-40%, with the trend first increasing before decreasing. The pre-stress friction loss in specimen with curve duct accounts for 10-30%. The pressure on the curved part definitely increases the friction when compared with the straight duct. The pre-stress friction loss in specimen with rubber hose reaches nearly 40%, which is larger than the metal bellow and plastic bellow. The suggested values for each case are proposed for a deviation coefficient κ of 0.0017-0.007 and a friction coefficient µ of 0.108-0.858. This can provide reliable theoretical support for the design and construction.

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