Reinforced Concrete Beams with Hexagonal Chicken Wire Under Monotonic and Cyclic Loading

2021 ◽  
Author(s):  
Morteza Bastami ◽  
Mehdi Heydarmoradi ◽  
Javad Chegini ◽  
Mostafa Abbasnejad
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Concrete Beams ◽  
Reinforced Concrete Beams

Effects of Strain Rate on Reinforced Concrete Beam

2011 ◽  
Vol 243-249 ◽  
pp. 4033-4036 ◽  
Author(s):  
Min Li ◽  
Hong Nan Li
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Strain Rate ◽  
Failure Mode ◽  
Loading Rate ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Strain Rate Effects ◽  
Shear Span ◽  
Rate Effects

The strain-rate effects of reinforced concrete beams are studied in this paper. Considering the strain-rate effects of structural material, dynamic responses of reinforced concrete beams subjected to monotonic loading and cyclic loading at different loading rates that might be experienced during earthquakes are simulated using the nonlinear finite element program ABAQUS. The influences of loading rate on loading capability and failure mode of reinforced concrete beams are investigated. The results show that as the loading rate increases, the loading capability increases, the increment is associated with the shear span ratio and loading mode. The increment at cyclic loading is smaller than that at monotonic loading; as the shear span ratio changes, the failure mode changes, the increment changes; the failure mode has nothing to do with the loading rate.

Experimental Study of Cyclic Loading Behaviors of Reinforced Concrete Beams Strengthening with Externally Bonded Steel Frame

2012 ◽  
Vol 201-202 ◽  
pp. 304-307
Author(s):  
Li Yun Pan ◽  
Cheng Chen ◽  
Shun Bo Zhao ◽  
Chang Yong Li
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Steel Plate ◽  
Concrete Beams ◽  
Steel Frame ◽  
Reinforced Concrete Beams ◽  
Test Results ◽  
Service Load ◽  
Externally Bonded ◽  
Ultimate Resistance

Two large impaired reinforced concrete beams with pre-loading cracks were strengthened by the externally bonded steel frame composed with bottom steel plate and side hoop steel belts. The cyclic loading behaviors of these beams were tested to verify the effectiveness of this strengthening method specified in current Chinese design code. Based on the analyses of test results, the steel plate worked well with bonded concrete under normal service load, the hoop steel belts were necessary to prevent the peeling of bottom steel plate. The strengthened beams were effectively enhanced in flexural stiffness and ultimate resistance, and no new cracks appeared under the normal service load.

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