Behaviour of Steel Strapping Tensioning Technique (SSTT) confined high-strength concrete with different lateral pre-tensioning stresses

• Main Authors: Lee, Hoong Pin, Awang, Abdullah Zawawi, Omar, Wahid
• Format: Conference or Workshop Item
• Published: 2013
• Subjects: TA Engineering (General). Civil engineering (General)
• Online Access: http://eprints.utm.my/id/eprint/37329/; https://www.researchgate.net/publication/261774184_Behaviour_of_Steel_Strapping_Tensioning_Technique_SSTT_Confined_High-Strength_Concrete_with_Different_Lateral_Pre-tensioning_Stresses

This paper presents the results of an experimental and analytical study on the application of Steel Strapping Tensioning Technique (SSTT) confinement on twelve high-strength concrete cylinder specimens with dimension of 100 mm and 200 mm in diameter and height respectively. The specimens were confinement volumetric-identically wrapped with two different confining materials of different mechanical properties and lateral pre-tensioning stresses, namely SSTT(HC) and SSTT(SS). The performance of SSTT-type confined specimens were studied through their stress-strain relationship upon the longitudinal and transverse deformation, mode of failure, level of lateral pre-tensioning stress, etc. The results show that SSTT-type confinement would significantly controlled the brittleness problem of high-strength concrete and at the same time, enhancing both ultimate compressive strength and ductility up to 65% and 344%, 36% and 269% for both SSTT(HC) and SSTT(SS), respectively. In addition, the result of an analytical comparison between SSTT-type confinement and existing confinement models show a linear relationship between the compressive strength enhancement and confinement ratio. The experimental results also been validated by comparing the observed stress-strain relationship to those calculated based on Mander's confinement.