Rigid body spring network modeling of the tension stiffening of FRP-strengthened RC members

Title: Rigid body spring network modeling of the tension stiffening of FRP-strengthened RC members
Author(s): Jian-Guo Dai
Paper category : conference
Book title: International RILEM Conference on Advances in Construction Materials Through Science and Engineering
Editor(s): Christopher Leung and K.T. WAN
ISBN: 978-2-35158-116-2
e-ISBN: 978-2-35158-117-9
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 600 - 607
Total Pages: 8
Nb references: 22
Language: English

Abstract: Tension stiffening behavior of post-cracking concrete is an important phenomenon which has been extensively studied for reinforced concrete structures. Although externally bonded fibre reinforced polymer (FRP) composites are widely used for strengthening existing RC structures, it remains unclear to what extent the tension stiffening of post-cracking concrete is quantitatively influenced by the addition of FRP composites, as a result of the bond between the FRP and the concrete substrate. This paper presents a rigid body spring networks (RBSN) model, by which the tension stiffening behavior of concrete in FRP-strengthened RC tensile members was investigated. A two-parameter fracture energy-based model was deployed to represent the bond-slip behavior of the FRP-to-concrete interface. The reliability of the RBSN model was verified through comparisons with previous test results. Further parametric analysis has been conducted to investigate how the bond properties and the end anchorage conditions for the FRP-to-concrete interface influence the tension stiffening behavior of post-cracking concrete.

Online publication: 2011-10-31
Publication type : full_text
Public price (Euros): 0.00