Behavior of geopolymer and conventional concrete beam column joints under reverse cyclic loading

2016 ◽  
Vol 4 (3) ◽  
pp. 161-172 ◽  
Author(s):  
S. Deepa Raj ◽  
N. Ganesan ◽  
Ruby Abraham ◽  
Anumol Raju
Keyword(s):  
Cyclic Loading ◽  
Concrete Beam ◽  
Conventional Concrete

Comparing the Seismic Performance of Beam-Column Joints with and without SFRC when Subjected to Cyclic Loading

2012 ◽  
Vol 626 ◽  
pp. 85-89 ◽  
Author(s):  
Kay Dora Abdul Ghani ◽  
Nor Hayati Hamid
Keyword(s):  
Energy Dissipation ◽  
Cyclic Loading ◽  
Seismic Performance ◽  
Experimental Work ◽  
Concrete Beam ◽  
Steel Fiber ◽  
Precast Concrete ◽  
Experimental Results ◽  
Column Joint ◽  
Initial Cracks

The experimental work on two full-scale precast concrete beam-column corner joints with corbels was carried out and their seismic performance was examined. The first specimen was constructed without steel fiber, while second specimen was constructed by mixed up steel fiber with concrete and placed it at the corbels area. The specimen were tested under reversible lateral cyclic loading up to ±1.5% drift. The experimental results showed that for the first specimen, the cracks start to occur at +0.5% drifts with spalling of concrete and major cracks were observed at corbel while for the second specimen, the initial cracks were observed at +0.75% with no damage at corbel. In this study, it can be concluded that precast beam-column joint without steel fiber has better ductility and stiffness than precast beam-column joint with steel fiber. However, precast beam-column joint with steel fiber has better energy dissipation and fewer cracks at corbel as compared to precast beam-column joint without steel fiber.

Study on size effect of fibre reinforced polymer retrofitted reinforced concrete beam–column connections under cyclic loading

2013 ◽  
Vol 40 (4) ◽  
pp. 353-360 ◽  
Author(s):  
A.M. Choudhury ◽  
S.K. Deb ◽  
A. Dutta
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Size Effect ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Technical Literature ◽  
Reinforced Polymer ◽  
Reliable Assessment ◽  
Fibre Reinforced Polymer ◽  
Ultimate Load Carrying Capacity

Studies related to size effect are crucial for reliable assessment of behaviour of structural components subjected to dynamic loadings. The available theories of material behaviour that predict size effects are receiving increasing attention in the technical literature nowadays. This paper presents a study on size effect of fibre reinforced polymer retrofitted reinforced concrete beam–column connections based on experimental investigation under displacement controlled cyclic loading. Three different sizes of geometrically similar specimens have been considered to explore the possible existence of size effect. It was observed that the experimental results corroborate closely the size effect law proposed by Bazănt in all the cases studied. A parameter, energy dissipation of specimens per unit volume was introduced and its correlations with different drift angles for different sizes of the specimen exhibit the existence of size effect. Comparisons were also made among the tests results of control and retrofitted specimens in terms of gain in ultimate load carrying capacity and existence of size effect was distinctly observed.

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