RC beams strengthened by prestressed CFRP plate subjected to sustained loading and continuous wetting condition: Flexural behaviour

2021 ◽  
Vol 311 ◽  
pp. 125290
Author(s):  
Jun Deng ◽  
Xiaoda Li ◽  
Yi Wang ◽  
Yan Xie ◽  
Changkai Huang
Keyword(s):  
Rc Beams ◽  
Flexural Behaviour ◽  
Cfrp Plate ◽  
Sustained Loading

Experimental Study on Flexural Behavior of Damaged RC Beams Strengthened with Prestressed CFRP Plate

2011 ◽  
Vol 250-253 ◽  
pp. 2263-2270
Author(s):  
Rui Zhou ◽  
Mei Zhen Zhang ◽  
Zhou Hong Zong
Keyword(s):  
Experimental Study ◽  
Finite Element ◽  
Element Model ◽  
Nonlinear Finite Element ◽  
Flexural Behavior ◽  
Finite Element Models ◽  
Rc Beams ◽  
Cfrp Plate ◽  
Sustained Loading ◽  
The Finite Element Model

Strengthening using prestressed CFRP plate is a new developed technology in recent years, which can significantly improve the flexural behavior of reinforced concrete (RC) beams. In this paper, an experimental study including four RC beams stengthened with CFRP plates using self-developed anchorage system was carried out. The nonlinear finite element models of the strengthened beams were constructed to simulate the influence of flexural behavior on RC beams strengthened with CFRP plates under different damage degrees. The experimental results indicated that initial damage degrees have greatly influence on the crack distribution and ductility, deflection and the ultimate flexural strength of the strengthened beams, as well as steel reinforcement strain and CFRP plate strain. Meanwhile, the finite element model can predict accurately performances of strengthened RC beams before CFRP debonding. In addition, the numerical analysis indicated that the sustained loading while strengthening RC beam using prestressed CFRP plates would induce adverse effect, so the live loading should be removed before starting the strengthening works.

RC beams strengthened by prestressed CFRP plate subjected to sustained loading and continuous wetting condition: Time-dependent prestress loss

2021 ◽  
Vol 275 ◽  
pp. 122187
Author(s):  
Xiaoda Li ◽  
Jun Deng ◽  
Yi Wang ◽  
Yan Xie ◽  
Tonghua Liu ◽  
...  
Keyword(s):  
Time Dependent ◽  
Rc Beams ◽  
Prestress Loss ◽  
Cfrp Plate ◽  
Sustained Loading

Effects of Fibres on the Flexural Behaviour of Sound and Damaged RC Beams

2020 ◽  
pp. 423-432
Author(s):  
Raúl L. Zerbino ◽  
María C. Torrijos ◽  
Graciela M. Giaccio ◽  
Antonio Conforti
Keyword(s):  
Rc Beams ◽  
Flexural Behaviour

Experimental analysis on flexural behaviour of RC beams strengthened with CFRP laminates and under fire conditions

2018 ◽  
Vol 189 ◽  
pp. 516-528 ◽  
Author(s):  
Thiago B. Carlos ◽  
João Paulo C. Rodrigues ◽  
Rogério C.A. de Lima ◽  
Dhionis Dhima
Keyword(s):  
Experimental Analysis ◽  
Rc Beams ◽  
Flexural Behaviour ◽  
Cfrp Laminates ◽  
Fire Conditions

scholarly journals Experimental and analytical investigation on flexural behaviour of RC beams strengthened with NSM CFRP prestressed concrete prisms

2021 ◽  
Vol 257 ◽  
pp. 113385 ◽  
Author(s):  
Yu Deng ◽  
Zhenzhen Li ◽  
Hexin Zhang ◽  
Alberto Corigliano ◽  
Angus C.C. Lam ◽  
...  
Keyword(s):  
Prestressed Concrete ◽  
Analytical Investigation ◽  
Rc Beams ◽  
Flexural Behaviour

scholarly journals Flexural Behaviour of RC Beams Strengthened with Prestressed CFRP NSM Tendon Using New Prestressing System

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Woo-tai Jung ◽  
Jong-sup Park ◽  
Jae-yoon Kang ◽  
Moon-seoung Keum ◽  
Young-hwan Park
Keyword(s):  
Maximum Load ◽  
Experimental Results ◽  
Rc Beams ◽  
Failure Model ◽  
Anchor Plate ◽  
Flexural Behaviour ◽  
Bond Failure ◽  
Existing Structures ◽  
Effective Depth ◽  
Section Analysis

CFRP has been used mainly for strengthening of existing structures in civil engineering area. Prestressed strengthening is being studied to solve the bond failure model featuring EBR and NSMR methods. The largest disadvantage of the prestressing system is that the system cannot be removed until the filler is cured. This problem lowers the turning rate of the equipment and makes it limited to experiment, which stresses the necessity of a new prestressing system. Therefore, the present study applies a new prestressing system which reliefs the need to wait until the curing of the filler after jacking to the prestressing of NSMR and examines the effect of the prestressing size and location of the anchorage on the strengthened behaviour. The experimental results show that the crack and yield loads increase with higher level of prestress, while the ductility tends to reduce, and the anchor plate should be installed within the effective depth ds to minimize the occurrence of shear-induced diagonal cracks. The comparison of the experimental results and results by section analysis shows that the section analysis could predict the maximum load of the specimens strengthened by prestressed NSMR within an error between 4% and 6%.

Sign in / Sign up

Export Citation Format

Share Document