scholarly journals BEHAVIOR OF PRECAST REINFORCED CONCRETE BEAM-COLUMN EXTERNAL CONNECTIONS UNDER CYCLIC LOADING

2019 ◽  
Author(s):  
AHMED TARABIA ◽  
SAID ALLAM ◽  
EMAD ETMAN ◽  
MOHAMED ABOELHASSAN
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
External Connections

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.

scholarly journals Low-Cycle Flexural Fatigue Behavior of Concrete Beam Reinforced with Hybrid FRP-Steel Rebar

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Jinkyo F. Choo ◽  
Young-Cheol Choi ◽  
Seung-Jun Kwon ◽  
Ki-Tae Park ◽  
Sung-Won Yoo
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Concrete Beam ◽  
Concrete Beams ◽  
Fatigue Behavior ◽  
Reinforced Concrete Beam ◽  
Flexural Behavior ◽  
Fatigue Cycle ◽  
Flexural Fatigue ◽  
Steel Rebar

Studies examined experimentally the flexural behavior of concrete beams reinforced with the hybrid FRP-steel rebar but very few among them evaluated their fatigue performance. In this study, the fatigue test has been performed, and an analytical model for simulating the flexural fatigue behavior of the concrete beam reinforced with the hybrid bar considering its postyielding behavior is developed. A formula relating the postyielding fatigue strain of the rebar to the number of the fatigue cycle is suggested and used in the proposed procedure. The method simulating the low-cycle behavior of the reinforced concrete beam is found to be satisfactory and can predict the number of cyclic loading to failure.

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