Reinforced concrete beams—the serviceability limit states

2010 ◽  
pp.  -491
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Limit States

Analysis of Cracking Moment and Immediate Deflection in FRP Rebars Reinforced Concrete Beams

2013 ◽  
Vol 671-674 ◽  
pp. 618-621 ◽  
Author(s):  
Shun Feng Liu ◽  
Mu Yi Hou ◽  
Xiao Liu ◽  
Ru Heng Wang
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Reinforced Concrete Beam ◽  
Reinforced Concrete Beams ◽  
Equivalent Condition ◽  
Limit States ◽  
Steel Reinforced Concrete ◽  
Four Point Bending ◽  
Reinforced Polymer ◽  
Low Elastic Modulus

Fiber reinforced polymer rebars have advantages of light weight, high tensile strength and excellent corrosion resistance. However, researches showed that [1-2], the low elastic modulus of FRP rebar resulting in a larger deflection than steel reinforced concrete beam in equivalent condition. Therefore, it is crucial to control the deflections in serviceability limit states. Three GFRP reinforced concrete beams were tested with four-point bending, deducing the cracking moment formula of the FRP reinforced beam. Then, Bischoff model is adopted to calculate the deflection, and reaching a good agreement with the experimental results. We recommend Bischoff model to evaluate the immediate deflections.

scholarly journals Serviceability limit states of high performance reinforced concrete beams with hybrid fibre

2013 ◽  
Vol 12 (1) ◽  
pp. 155-162
Author(s):  
Piotr Smarzewski
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Beams ◽  
Fibre Volume ◽  
Reinforced Concrete Beams ◽  
Fibre Reinforcement ◽  
Limit States ◽  
Polypropylene Fibres ◽  
Volume Percentage

The article presents the results of research and analysis of reinforced high performance concrete beams with steel and polypropylene fibres at service load. The beams were bent in the 4-point model. Research was carried out for three different rectangular reinforced concrete beams in terms of the quantity and the type of reinforcement. The beam B1 was constructed conventionally with reinforced steel rods. The beams B2 and B3, instead of the compressive rods and the stirrups the fibre reinforcement of variable fibre volume percentage was applied. In the tests a non-contact system for three-dimensional measurements of deformation – ARAMIS was used. The analysis of the behaviour of the beams under static load for serviceability was based on: images of cracks, strain and force – displacement curves.

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