Overview of Factors Affecting the Behavior of Reinforced Concrete Columns with Imperfections at High Temperature

2021 ◽  
Author(s):  
Khaled Ahmed Mahmoud
Keyword(s):  
Reinforced Concrete ◽  
High Temperature ◽  
Concrete Columns ◽  
Reinforced Concrete Columns ◽  
Factors Affecting

Failure Analysis of Reinforced Concrete Columns after High Temperature

2012 ◽  
Vol 157-158 ◽  
pp. 1578-1581 ◽  
Author(s):  
Li Li Bai ◽  
Tao Song
Keyword(s):  
Reinforced Concrete ◽  
High Temperature ◽  
Failure Analysis ◽  
Failure Modes ◽  
Limit State ◽  
Concrete Columns ◽  
State Equation ◽  
Single Factor ◽  
Reinforced Concrete Columns ◽  
Eccentric Compression

Mechanics models of RC(reinforced concrete) columns is established, after the limit state equation was formed, the failure modes of RC eccentric compression columns after high temperature is analyzed under considering various failure paths. Analysis results indicates that failure analysis is not safe under considering single failure mode, so comprehensive considering failure modes is more matching the true situation than only considering single factor when evaluate reliability of RC eccentric compression columns post-fire

scholarly journals Experimental and Computer Research of Reinforced Concrete Columns Under High Temperature Effects

2020 ◽  
Vol 16 (2) ◽  
pp. 55-61
Author(s):  
M.G. Surianinov ◽  
◽  
Yu.A. Otrosh ◽  
P.G. Balduk ◽  
I.F. Dadashov ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
High Temperature ◽  
Temperature Effects ◽  
Concrete Columns ◽  
Reinforced Concrete Columns ◽  
Computer Research

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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