Plastic Hinge Length of Corroded Reinforced Concrete Beams

2014 ◽  
Vol 111 (5) ◽  
Author(s):  
Yu-Chen Ou ◽  
Nguyen Dang Nguyen
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Plastic Hinge ◽  
Reinforced Concrete Beams ◽  
Plastic Hinge Length

scholarly journals Numerical Sensing of Plastic Hinge Regions in Concrete Beams with Hybrid (FRP and Steel) Bars

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3255 ◽  
Author(s):  
Fang Yuan ◽  
Mengcheng Chen
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Concrete Beams ◽  
Plastic Hinge ◽  
Reinforcement Ratio ◽  
Reinforced Concrete Beams ◽  
Concrete Members ◽  
Steel Bars ◽  
Hybrid Reinforcement ◽  
Steel Hardening

Fibre-reinforced polymer (FRP)-reinforced concrete members exhibit low ductility due to the linear-elastic behaviour of FRP materials. Concrete members reinforced by hybrid FRP–steel bars can improve strength and ductility simultaneously. In this study, the plastic hinge problem of hybrid FRP–steel reinforced concrete beams was numerically assessed through finite element analysis (FEA). Firstly, a finite element model was proposed to validate the numerical method by comparing the simulation results with the test results. Then, three plastic hinge regions—the rebar yielding zone, concrete crushing zone, and curvature localisation zone—of the hybrid reinforced concrete beams were analysed in detail. Finally, the effects of the main parameters, including the beam aspect ratio, concrete grade, steel yield strength, steel reinforcement ratio, steel hardening modulus, and FRP elastic modulus on the lengths of the three plastic zones, were systematically evaluated through parametric studies. It is determined that the hybrid reinforcement ratio exerts a significant effect on the plastic hinge lengths. The larger the hybrid reinforcement ratio, the larger is the extent of the rebar yielding zone and curvature localisation zone. It is also determined that the beam aspect ratio, concrete compressive strength, and steel hardening ratio exert significant positive effects on the length of the rebar yielding zone.

Estimation of Ultimate Tendon Stress in Reinforced Concrete Beams Prestressed with External FRP Tendons

2013 ◽  
Vol 798-799 ◽  
pp. 374-377
Author(s):  
Shuan Jiang
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Concrete Beams ◽  
Plastic Hinge ◽  
Reinforced Concrete Beam ◽  
Reinforced Concrete Beams ◽  
Test Results ◽  
Stress Increment ◽  
Hinge Zone ◽  
Good Agreement

The ultimate tendon stress is the key to calculation of flexural capacity in reinforced concrete beam prestressed with external FRP tendons (RCBPEFT). Based on the theory of equivalent plastic hinge zone, the general formulas for calculating the ultimate tendon stress increment and ultimate tendon stress in RCBPEFT are therefore proposed. Comparisons indicate that the predictions are in good agreement with the test results.

scholarly journals STRUCTURAL PERFORMANCE OF REINFORCED CONCRETE BEAMS WITH PLASTIC HINGE RELOCATION METHODS

2021 ◽  
Vol 86 (789) ◽  
pp. 1519-1528
Author(s):  
Hideyoshi WATANABE ◽  
Tomoaki SUGIYAMA ◽  
Tomoya TAKAHASHI ◽  
Yoshitaka SAKAI ◽  
Takuya WAKITA ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Plastic Hinge ◽  
Reinforced Concrete Beams ◽  
Structural Performance

scholarly journals Influence of the plastic hinge rotations on shear strength in continuous reinforced concrete beams with shear reinforcement

2020 ◽  
Vol 207 ◽  
pp. 110242 ◽  
Author(s):  
Andrea Monserrat López ◽  
Pedro Fco. Miguel Sosa ◽  
José Luis Bonet Senach ◽  
Miguel Ángel Fernández Prada
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Concrete Beams ◽  
Plastic Hinge ◽  
Reinforced Concrete Beams ◽  
Shear Reinforcement

scholarly journals Bending Load-Carrying Capacity of Reinforced Concrete Beams Subjected to Premature Failure

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3085 ◽  
Author(s):  
Paolo Foraboschi
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Wide Spectrum ◽  
Plastic Hinge ◽  
Reinforced Concrete Beams ◽  
Load Carrying Capacity ◽  
Premature Failure ◽  
Bending Load ◽  
Load Carrying ◽  
Hinge Model

This paper investigates the ultimate flexural strength of reinforced concrete beams when affected by premature failure due to a rotational capacity of the first plastic hinge being consumed before the last plastic hinges reach their maximum possible moment. The paper provides a simple formula for predicting the ultimate load of a hyperstatically supported beam, taking into account the available ductility. The proposed formula is the result of calibration against the ultimate loads from a non-linear analysis on a variety of beams, with a wide spectrum of configurations and with concrete grades from 10.0 to 60.0 N/mm2. The formula in based on the plastic hinge model, making it easy to apply, and the ultimate bending moments allow for the actual rotational capacity, making predictions accurate.

Flexural and Plastic Hinge Behaviour of GFRP Confined FRC Beams

2013 ◽  
Vol 838-841 ◽  
pp. 448-453
Author(s):  
S. Palanivel ◽  
M. Sekar
Keyword(s):  
Reinforced Concrete ◽  
Large Deformations ◽  
Concrete Beams ◽  
Plastic Hinge ◽  
Reinforced Concrete Beams ◽  
Fiber Mats ◽  
Number Of Layers ◽  
Hinge Zone ◽  
Critical Regions ◽  
Fiber Addition

In this investigation, it was planned to study the flexural and plastic hinge behaviour of reinforced concrete beams confined with GFRP wraps and polyolefin fiber addition in critical regions (plastic hinge zone) along with stirrup confinement. The variables are the number of layers and chopped/woven type of wrapping, which controls the behaviour of the GFRP, and the percentage of polyolefin addition. The programme consisted of casting and testing 20 rectangular reinforced concrete beams of the size of 150 mm × 230 mm × 2000 mm, under a symmetrical two point loading. During the casting of the beams, the middle one third 600mm of the beams were cast with polyolefin fibers concrete, of volume fractions 0.3%, 0.5%,0.7%,0.9% and 1.2%. After the curing of the beams, glass fiber mats along with polyester resin were wrapped over the beams in the plastic hinge zone (critical zone) for 600 mm length; i.e., 300 mm from the centre on each side. Polyolefin fiber addition to the lateral tie and GFRP confined beams has the advantage over the confinement by the lateral ties and FRP wrap in improving the performance under large deformations.

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