scholarly journals Numerical study on effects of the degree of water saturation on ICCP of chloride-contaminated RC structures

2022 ◽  
Vol 45 ◽  
pp. 103619
Author(s):  
Bingbing Guo ◽  
Guofu Qiao ◽  
Peng Han ◽  
Qiang Fu
Keyword(s):  
Water Saturation ◽  
Numerical Study ◽  
Rc Structures ◽  
Chloride Contaminated

scholarly journals Behaviour of RC structures strengthened with prestressed CFRP laminates: a numerical study

2019 ◽  
Author(s):  
José Sena-Cruz ◽  
Luís Correia ◽  
Paulo França
Keyword(s):  
Numerical Study ◽  
Shear Stresses ◽  
Premature Failure ◽  
Rc Structures ◽  
Cfrp Laminate ◽  
Flexural Strengthening ◽  
Cfrp Laminates ◽  
Externally Bonded ◽  
Fibre Reinforced Polymer ◽  
Rc Slabs

<p>The externally bonded reinforcement (EBR) technique is one of the most widely used strategies for the flexural strengthening of reinforced concrete (RC) with fibre reinforced polymer (FRP) materials. The EBR technique offers several structural advantages when the FRP material is prestressed. The development of high shear stresses at the ends of the prestressed FRP material can cause premature FRP peeling-off failure. This premature failure can be delayed or even avoided with the use of special end-anchorage systems, like the mechanical anchorage (MA) system and the gradient anchorage (GA) system. This paper presents an experimental and a numerical study on RC slabs strengthened in flexure with prestressed carbon FRP (CFRP) laminate strips, namely: (i) one reference slab; (ii) one slab strengthened with non- prestressed externally bonded CFRP (EB-CFRP) laminate; (iii, iv) and two slabs strengthened with prestressed EB-CFRP laminates using the MA and GA systems. The performance of these simulations was compared with results of the slabs experimentally tested up to failure. Subsequently, these models were used on a parametric study that intended to investigate the influence of different parameters affecting the behaviour of the slabs strengthened with prestressed EB-CFRP laminates.</p>

scholarly journals Experimental and analytical investigations of reinforced concrete beams strengthened by different CFRP sheet schemes.

2021 ◽  
Vol 15 (56) ◽  
pp. 123-136
Author(s):  
Mahmoud Madqour ◽  
khaled fawzy ◽  
Hilal Hassan
Keyword(s):  
Numerical Study ◽  
High Strength ◽  
Epoxy Adhesive ◽  
Ease Of Use ◽  
Experimental Results ◽  
Reinforced Concrete Beams ◽  
Rc Beams ◽  
Finite Element Program ◽  
Rc Structures ◽  
Bending Load

The use of bonded externally polymer reinforced fiber (FRP) Laminates has been introduced as an effective approach in rehabilitating (RC) structures due to their high strength, corrosion resistance, reduced weight, and ease of use. This paper discusses the experimental results of the flexural reinforcement of RC beams by CFRP sheets bonded by epoxy adhesive to the tensile surface of the beams. Using a four-point bending load system over an effective clear length of 1800 mm, a total of ten beams with an overall dimension of 150 * 200 * 2000 with different degrees of strengthening schemes were constructed and tested. A numerical study using ANSYS finite element program was conducted by modeling RC beams. The number of layers, strengthening scheme (side and U-shape bonding) and reinforcement ratio are the major parameters of the experimental study. the research indicate that the flexural strength of the beams was substantially improved as the layers of laminate increased between 31.80 and 71.50 % and using U shape in ends delaying or preventing debonding failure. The result obtained using ANSYS model showed acceptable agreement with the experimental results, with deviations varying no more than 10 % for all specimens. 

Symptom-Based Reliability Analysis and Remaining Service Life Prediction of Deteriorating RC Structures

2013 ◽  
Vol 569-570 ◽  
pp. 151-158
Author(s):  
Tian Li Huang ◽  
Hua Peng Chen
Keyword(s):  
Service Life ◽  
Reliability Analysis ◽  
Numerical Study ◽  
Weibull Model ◽  
Reinforcement Corrosion ◽  
Analysis Method ◽  
Resistance Development ◽  
Rc Structures ◽  
Remaining Service Life ◽  
Flexural Resistance

This paper proposes a symptom-based reliability analysis method for deteriorating reinforced concrete (RC) structures on the basis of monitored data. The structural flexural resistance due to reinforcement corrosion is selected as a symptom which reflects the deteriorating structural performance. The symptom reliability and remaining service life are then estimated from the Weibull model for the structural flexural resistance development. The results for the numerical study example show the proposed approach is capable of prediction the remaining service life for the deteriorating RC structures subjected to the reinforcement corrosion.

Analysis of FRP/Concrete Interface Creep Using Fractional Derivative Rheological Model

2014 ◽  
Vol 1079-1080 ◽  
pp. 18-21
Author(s):  
Xiao Meng Wang ◽  
Chu Wei Zhou
Keyword(s):  
Fractional Derivative ◽  
Rheological Model ◽  
Numerical Study ◽  
Engineering Application ◽  
High Strength ◽  
Simple Expression ◽  
Rc Structures ◽  
Long Term Performance ◽  
Term Performance ◽  
Concrete Interface

FRPhas been widely used in the strengtheningof RC structures because of its low density, high strength and anti-corrosion. Long term performance ofFRP/concrete interface is one of the keys for its successful engineering application, and however it has notbeen well studied. In this article a fractional derivative rheological model was proposed which is able to characterize the complicated creepdeformation of epoxy FRP/concreteinterface layer with simple expression. Numerical study revealed thatinterfacial creep might lead to notable stress redistribution and largeinterfacial deformation has possibility to cause weakening of FRPstrengthening.

Sign in / Sign up

Export Citation Format

Share Document