Studies on carbon fiber polymer confined slender plain and steel fiber reinforced concrete columns

2015 ◽  
Vol 102 ◽  
pp. 31-39 ◽  
Author(s):  
Cengiz Dundar ◽  
Duygu Erturkmen ◽  
Serkan Tokgoz
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Steel Fiber ◽  
Concrete Columns ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Reinforced Concrete Columns ◽  
Carbon Fiber Polymer

Axial monotonic and cyclic compressive behavior of square GFRP tube–confined steel-reinforced concrete composite columns

2020 ◽  
Vol 24 (1) ◽  
pp. 25-41
Author(s):  
Weichang Pei ◽  
Daiyu Wang ◽  
Xuan Wang ◽  
Zhenyu Wang
Keyword(s):  
Reinforced Concrete ◽  
Steel Fiber ◽  
Concrete Columns ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Reinforced Concrete Column ◽  
Steel Reinforced Concrete ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic

Fiber-reinforced polymer tube–confined steel fiber–reinforced concrete column is a novel composite column proposed recently, which consists of a traditional steel-reinforced concrete column and an external glass fiber–reinforced plastic tube for lateral confinement. In order to investigate the axial compression behavior of steel fiber–reinforced concrete columns, a total of 16 square specimens were fabricated and tested under axial monotonic and cyclic compressive loading. Three different configurations of inner shaped steels, including cross-shaped, box-shaped with wielding, and box-shaped without wielding were considered. Two thicknesses of glass fiber–reinforced concrete tubes were also considered as the main experimental parameters. On the basis of test results, a thorough analysis of the failure process based on strain analysis was discussed. The test results showed that steel fiber–reinforced concrete columns exhibited higher ductility and load capacity compared with fiber-reinforced plastic–confined plain concrete columns. Two quantitative indexes were proposed to measure the confinement of steel fiber–reinforced concretes. The axial cyclic mechanical behaviors were discussed through comparative analysis with monotonic behaviors. The remnant strains and modulus of the cyclic behaviors were also discussed.

scholarly journals Mechanical Behavior of Steel Fiber-Reinforced Concrete Beams Bonded with External Carbon Fiber Sheets

Materials ◽  
2017 ◽  
Vol 10 (6) ◽  
pp. 666 ◽  
Author(s):  
Viktor Gribniak ◽  
Vytautas Tamulenas ◽  
Pui-Lam Ng ◽  
Aleksandr K. Arnautov ◽  
Eugenijus Gudonis ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Mechanical Behavior ◽  
Steel Fiber ◽  
Concrete Beams ◽  
Fiber Reinforced Concrete ◽  
Reinforced Concrete Beams ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete

BEHAVIOR OF PLAIN AND STEEL FIBER HIGH STRENGTH REINFORCED CONCRETE COLUMNS CONFINED WITH CFRP

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Duygu Erturkmen ◽  
Cengiz Dundar ◽  
Serkan Tokgoz
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Steel Fiber ◽  
High Strength ◽  
Concrete Columns ◽  
Steel Fibers ◽  
Fiber Reinforced ◽  
Reinforced Concrete Columns ◽  
Strength Capacity ◽  
Structural Applications

High strength reinforced concrete columns have been increasingly used in structural applications. It is known that high strength reinforced concrete columns exhibit brittle behavior under applied loads. Therefore, steel fibers can be added into the core concrete to improve the ductility and deformability of high strength reinforced concrete columns. In addition, reinforced concrete columns can be wrapped with carbon fiber reinforced polymer (CFRP) materials for strengthening the columns. In this work, experimental and analytical studies on plain and steel fiber reinforced concrete columns and CFRP confined columns have been presented. The experimental strength capacities, load-deflection relations and failure modes of the column specimens have been observed. The effects of the parameters of concrete compressive strength, load eccentricity, steel fibers, and carbon fiber polymer material on the structural behavior of high strength reinforced concrete columns have been examined. It is concluded that the inclusion of steel fibers has considerable effect on column ductility and deformability, but has insignificant effect on column strength capacity. The experimental study exposed that wrapping CFRP material on plain and steel fiber high strength reinforced concrete columns has provided significant improvement on the column strength capacity and confinement. The tested columns have been analyzed with a theoretical method considering the experimental stress-strain relations of CFRP confined concrete; and the analysis shows good agreement with the experimental results.

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