0000000001036526
AUTHOR
G. Campione
Analytical and Numerical Methods for the Evaluation of Critical Conditions in Longitudinal Bars of RC Columns
Buckling collapse of reinforcing bars in concrete members is usually observed in framed structures after severe earthquakes. Second order effects modify the compressive response of steel bars, reducing ductility and affecting the post-elastic branch. Literature investigations show that instability can involve more stirrups, or it can be limited to the pitch. If the critical length is not carefully estimated, transverse steel’s failure can be achieved in brittle manner, causing the sudden loss of confinement in the inner concrete. This paper presents the results of a theoretical investigation, aiming to evaluate the reliability of different approaches for calculating critical conditions of l…
Assessment of the load carrying capacity of reinforced concrete columns strengthened by steel cages Specificità nella valutazione della capacità portante di colonne in calcestruzzo armato rinforzate con incamiciatura in acciaio
In the present paper, a selected review of the most relevant analytical models provided for the evaluation of the con-finement properties of Steel Jacketed RC columns is discussed. The reliability of the models is tested by comparing the analytical predictions of the load capacity with experimental results available in the literature depending on the type of mechanical end-connections. Moreover, new considerations regarding the application of the steel jacketing on columns while loaded are faced by experimental investigation
Flexural behavior of corroded RC beams
Synopsis: A handily model to evaluate the bending resistance and the ductility of corroded beams critical in flexure and shear is proposed and debated. Effects of diffused and pitting corrosion on steel bars, compressive concrete strength reduction and concrete bond strength reduction due to rust creation are modelled. Practical method derived on limit state theory was here used to calculate the flexural and shear strength and the available ductility. The effectiveness of the model was also corroborated against numerous results collected in the literature pertaining to bending and shear resistance.