FRP-Reinforced Concrete–Steel Double-Skin Tubular Coupling Beam Subjected to Reversed Cyclic Loading

2021 ◽  
Vol 25 (4) ◽  
pp. 04021033
Author(s):  
Cheng Chen ◽  
Qi Zeng ◽  
Zhuo Gao ◽  
Lili Sui ◽  
Yingwu Zhou
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Coupling Beam ◽  
Reversed Cyclic Loading ◽  
Double Skin ◽  
Reversed Cyclic

scholarly journals Behaviour of Hybrid Steel and FRP-Reinforced Concrete—ECC Composite Columns under Reversed Cyclic Loading

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4231 ◽  
Author(s):  
Fang Yuan ◽  
Liping Chen ◽  
Mengcheng Chen ◽  
Kaicheng Xu
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Plastic Hinge ◽  
Local Buckling ◽  
Hinge Region ◽  
Reinforced Concrete Column ◽  
Reversed Cyclic Loading ◽  
Reversed Cyclic ◽  
Frp Bars ◽  
Strength And Ductility

Fibre-reinforced polymer (FRP) is used widely in concrete structures owing to its noncorrosive, light-weight, nonmagnetic, and high tensile-strength properties. However, the FRP-reinforced concrete flexural member exhibits low ductility owing to the linear–elastic property of FRP reinforcement. Hybrid steel—FRP-reinforced concrete members exhibit good strength and ductility under flexure owing to the inelastic deformation of steel reinforcement. The existing investigations have focused on the mechanical behaviours of the hybrid steel—FRP-reinforced flexural members. Only few studies have been reported on the members under combined flexural and compression loads, such as columns, owing to the poor compressive behaviour of FRP bars. We herein propose a new type of hybrid steel—FRP-reinforced concrete—engineered cementitious composite (ECC) composite column with ECC applied to the plastic hinge region and tested it under reversed cyclic loading. The hybrid steel—FRP-reinforced concrete column was also tested for comparison. The influence of matrix type in the plastic hinge region on the failure mode, crack pattern, ultimate strength, ductility, and energy dissipation capacity, of the columns were evaluated systematically. We found that the substitution of concrete with ECC in the plastic hinge zone can prevent the local buckling of FRP bars efficiently, and subsequently improve the strength and ductility of the column substantially.

Axial Strain of Reinforced Concrete Columns

2010 ◽  
Vol 163-167 ◽  
pp. 1858-1861 ◽  
Author(s):  
Jong Wook Park ◽  
Sang A Cha ◽  
Ji Eun Kang ◽  
Mohamad Mansour ◽  
Jung Yoon Lee
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Axial Force ◽  
Axial Strain ◽  
Plastic Hinge ◽  
Rc Columns ◽  
Reversed Cyclic Loading ◽  
Depth Ratio ◽  
Short Span ◽  
Reversed Cyclic

The reinforced concrete members are designed to fail in flexural member to behave ductilely. Also the failure doesn’t impose on columns but beams. But according to the plastic collapse mechanism, the plastic hinge potentially developed at the bottom of the RC column near the base of the structure after flexural yielding. These columns are generally dominated by shear which led to sudden failure in post yielding region because of its relatively short span-to-depth ratio, so special care is needed. The deformability of column with short span-to-depth ratio is small compared with larger span-to-depth ratio column under reversed cyclic loading. Therefore the design of these kinds of RC columns necessitates the prediction of both the shear strength after flexural yielding and corresponding ductility of such members. Ten RC columns with varying axial force ratio and shear reinforcement ratio were tested under monotonic and reversed cyclic loading. The most affectable factor to column behavior was the axial force. The result indicates that concrete contribution to shear resistance in the plastic hinge region and axial strain were decreased as axial force.

scholarly journals Experimental Studies on Seismic Performance of Precast Steel Reinforced Concrete Frame and Connections

2015 ◽  
pp. 349-357
Author(s):  
Xiang Hu ◽  
Weichen Xue ◽  
Yanbo Sun ◽  
Chenguang Li
Keyword(s):  
Reinforced Concrete ◽  
Energy Dissipation ◽  
Cyclic Loading ◽  
Seismic Performance ◽  
Experimental Studies ◽  
Frame Structures ◽  
Seismic Zone ◽  
Reversed Cyclic Loading ◽  
Steel Reinforced Concrete ◽  
Reversed Cyclic

A new type of precast steel reinforced concrete (PSRC) frame, which were composed of composite steel reinforced concrete (CSRC) beam, PSRC column and cast-in-situ (CIS) joint, were proposed in this paper. The assemble technique used in the ordinary steel structures were adopted in PSRC frames to improve the construction efficiency. The seismic performance of PSRC frame structures was investigated based on the test results of connections and frame. Firstly, full-scale internal connection specimens, including a CIS connection specimen RCJ-1 and a PSRC connection specimen PCJ-1, were tested under low reversed cyclic loading. Results revealed that both the specimens RCJ-1 and PCJ-1 exhibited similar performance in terms of loading capacity, stiffness degradation and energy dissipation. The ductility of specimen PCJ-1 was about 3.81, which was a little lower than the specimen RCJ-1. Then, a 1/3-scale PSRC frame structure specimen, namely PCF-1, was tested under low reversed cyclic loading. Results showed that the PSRC frame specimen PCF-1 was failed in mixed failure mechanism, which provide good energy dissipation capacity. The ductility coefficient of PCF-1 was about 3.45 indicating that the PCF-1 behaved in ductility manner. The results of this investigation could enrich the data available documenting the behavior of PSRC frame, and contribute to enlarge the application of PSRC frame structures in seismic zone.

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