scholarly journals Cyclic load testing of three haunched reinforced concrete beam-column assemblies

1982 ◽  
Vol 15 (3) ◽  
pp. 141-153
Author(s):  
S. J. Thurston
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Load Distribution ◽  
Cyclic Load ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Load Testing ◽  
Full Size ◽  
Hysteretic Behaviour ◽  
Gravity Load

The paper describes the testing of three reinforced concrete haunched beam-column assemblies under incremented-static cyclic loading. The half or full size test units were based upon typical interior joints of external frames of multi-storey buildings designed to the current NZ loading code. Hinge formation occurred in the beams and stable hysteretic behaviour was obtained up to model displacement ductilities of 6 (worst unit) to 18 (best unit). Corresponding prototype building ductilities are shown to be slightly higher. Tests results indicated the importance of matching the yield moment strengths in the haunch with the combined seismic and gravity load distribution.

scholarly journals Cyclic load testing of two refined reinforced concrete beam-column joints

1979 ◽  
Vol 12 (3) ◽  
pp. 238-255
Author(s):  
R. W. G. Blakeley ◽  
F. D. Edmonds ◽  
L. M. Megget ◽  
J. H. Wood
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Load ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Load Testing ◽  
Test Results ◽  
Dead Load ◽  
Design Code ◽  
Prototype Structure ◽  
Column Joint

The paper describes the testing of two reinforced concrete beam-column joint units tested under incremented-static cyclic
 loading. The full size test units were based upon an interior beam-column joint of a four-storey 
framed building designed to the current NZ loading code and represent 
refinements on two previously tested conventional joints of similar dimensions. One unit differed from common practice by having a post-tensioned beam stressed to balance the floor dead load of the prototype structure whilst the second unit was detailed with haunched beams. Hinge formation occurred in the beams and stable hysteretic behaviour was obtained up to displacement ductilities of 10 for the prestressed unit and 6 for the haunched unit. The test results are analysed in terms of the draft NZ design code, DZ 3101, and the ACI Recommendations for beam-column joint design.

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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