scholarly journals Residual strength of blast damaged reinforced concrete columns

2010 ◽  
Vol 37 (3) ◽  
pp. 295-308 ◽  
Author(s):  
Xiaoli Bao ◽  
Bing Li
Keyword(s):  
Reinforced Concrete ◽  
Residual Strength ◽  
Concrete Columns ◽  
Reinforced Concrete Columns

Axial-Bending Interaction Diagrams of Reinforced Concrete Columns Exposed to Chloride Attack

2016 ◽  
Vol 847 ◽  
pp. 415-422
Author(s):  
Giuseppe Carlo Marano ◽  
Rita Greco
Keyword(s):  
Reinforced Concrete ◽  
Pitting Corrosion ◽  
Residual Strength ◽  
Concrete Columns ◽  
Concrete Cover ◽  
Structural Element ◽  
Reinforced Concrete Columns ◽  
Interaction Diagram ◽  
Capacity Degradation ◽  
Chloride Attack

This paper focuses on reinforced concrete columns load carrying capacity degradation over time due to chloride induced steel pitting corrosion. The structural element is exposed to marine environment and the effects of corrosion are described by the time degradation of the axial-bending interaction diagram. Because chlorides ingress and consequent pitting corrosion propagation are both time-dependent mechanisms, the study adopts a time-variant predictive approach to evaluate residual strength of corroded reinforced concrete columns at different lifetimes. Corrosion initiation and propagation process is modelled by taking into account all the parameters, such as external environmental conditions, concrete mix proportion, concrete cover and so on, which influence the time evolution of the corrosion phenomenon and its effects on the residual strength of RC columns.

scholarly journals A Study on the Proposal of Residual Strength Equation of Reinforced Concrete Columns under Blast Load

2013 ◽  
Vol 13 (1) ◽  
pp. 17-23 ◽  
Author(s):  
Hosoon Choi ◽  
Dae Hwan Shin ◽  
Min-Sook Kim ◽  
Dae Jin Kim ◽  
Heecheul Kim ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Residual Strength ◽  
Concrete Columns ◽  
Blast Load ◽  
Reinforced Concrete Columns

Residual strength of reinforced concrete columns subjected to blast loading

2014 ◽  
Vol 66 (2) ◽  
pp. 60-71 ◽  
Author(s):  
Jong Yil Park ◽  
Min Sook Kim ◽  
Andrew Scanlon ◽  
Hosoon Choi ◽  
Young Hak Lee
Keyword(s):  
Reinforced Concrete ◽  
Residual Strength ◽  
Blast Loading ◽  
Concrete Columns ◽  
Reinforced Concrete Columns

Optimum Dosage of PP Fiber for the Spalling Control of High Strength Reinforced Concrete Columns

2007 ◽  
Vol 348-349 ◽  
pp. 621-624 ◽  
Author(s):  
S.H. Yoo ◽  
S.W. Shin ◽  
I.K. Kim
Keyword(s):  
Reinforced Concrete ◽  
High Temperature ◽  
Residual Strength ◽  
Fire Test ◽  
Concrete Strength ◽  
High Strength ◽  
Concrete Columns ◽  
Temperature Behavior ◽  
Reinforced Concrete Columns ◽  
Optimum Dosage

Spalling is defined as damages to concrete exposed to high temperature during fire, causing cracks and localized bursting of small pieces of concrete. As the concrete strength increases, the degree of damage caused by spalling becomes more serious due to impaired permeability. It has been reported that polypropylene(PP) fiber has an important role in protecting concrete from spalling, and the optimum dosage of PP fiber is 0.2%. However, this result was based on the fire test of non-reinforced concrete specimens. The high-temperature behavior of highstrength reinforced concrete columns with various concrete strength and various quantity of PP fibers is investigated in this study. The results revealed that the ratio of unstressed residual strength of columns increased as the concrete strength increased and as the quantity of PP fiber increased from 0% to 0.2% the residual strength of columns increase. However, the effect of PP fiber quantity on residual strength of column was barely above 0.2%.

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