Assessment of transmission length of prestressing strands according to fib Model Code 2010. (15th September 2017)

• Record Type: Journal Article
• Authors: Dang, Canh N.; Hale, W. Micah; Martí-Vargas, J.R.
• Is Part Of: Engineering structures. Volume 147(2017:Sep. 15)
• Page Start: 425
• Page End: 433
• Publication Date: 2017-09-15
• Subjects: Pretensioned concrete -- Transmission length -- Transfer length -- Strand draw-in -- 18-mm strand -- High-strength concrete; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2017.06.019
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: High-strength concrete was used to cast pretensioned concrete beams. Transmission length and strand draw-in of 18-mm prestressing strands were measured. The fib Model Code 2010 is conservative in predicting the transmission lengths. The use of high-strength concrete can shorten the transmission length. A center-to-center strand spacing of 50 mm is applicable for high-strength concrete. Abstract: The use of 18-mm prestressing strands is advantageous in the construction of long-span bridges. Transmission length is a significant parameter in the design of pretensioned concrete members. This study provides a unique set of experimental data to validate the applicability of using the fib Model Code 2010 to predict the transmission length and strand draw-in of 18-mm strands. Twelve pretensioned concrete beams were cast with high-strength concrete. Transmission lengths were measured at prestress transfer and at 28-day of age. The experimental results indicated the lower and upper bounds of transmission length specified by the code adequately predict the measured values.