Fire Resistance of High Strength Concrete Columns Subjected to Moderate Axial Restraint

2008 ◽  
Vol 18 (1) ◽  
pp. 79-103
Author(s):  
F. Ali ◽  
A. Nadjai
Keyword(s):  
Fire Resistance ◽  
High Strength Concrete ◽  
High Strength ◽  
Concrete Columns ◽  
Strength Concrete ◽  
High Strength Concrete Columns

Fire Resistance Performance of High-Strength Concrete Columns Reinforced with Pre-Stressed Wire Ropes

2013 ◽  
Vol 470 ◽  
pp. 880-883 ◽  
Author(s):  
Heung Youl Kim ◽  
Hyung Jun Kim ◽  
Kyung Hoon Park ◽  
Bum Youn Cho ◽  
Jae Sung Lee
Keyword(s):  
Fire Resistance ◽  
High Strength Concrete ◽  
High Strength ◽  
Concrete Columns ◽  
Concrete Column ◽  
Wire Ropes ◽  
Strength Concrete ◽  
Design Load ◽  
Resistance Performance ◽  
High Strength Concrete Columns

In this study, the fire resistance performance of high-strength concrete columns was evaluated to see the influence of lateral confinement reinforcement with wire ropes for improving ductility, fire resistance reinforcement with fiber cocktail and load ratio. For this, loaded fire test was conducted under ISO834 standard fire condition. The axial ductility of the 60MPa high-strength concrete column reinforced with pre-stressed wire ropes was improved and its fire resistance performance was also improved by 23% compared with its counterpart without wire ropes. The appropriate load for the 60MPa concrete column reinforced with wire ropes was found to be 70% of design load. The fire resistance performance of the 100MPa high-strength concrete column reinforced with pre-stressed wire ropes and fiber-cocktail was improved as much as 4 times compared with that reinforced with tie bars only. The appropriate load for the 100MPa columns was found to be less than 70% of design load in order for the columns to secure required fire resistance performance.

Reliability Analysis of High-Strength Concrete Columns during a Fire

2014 ◽  
Vol 629-630 ◽  
pp. 273-278 ◽  
Author(s):  
Jian Zhuang Xiao ◽  
Qing Hai Xie ◽  
Yi Zhao Hou ◽  
Zhi Wei Li
Keyword(s):  
Reliability Analysis ◽  
Fire Resistance ◽  
High Strength Concrete ◽  
Elevated Temperatures ◽  
Axial Loading ◽  
High Strength ◽  
Concrete Columns ◽  
Explosive Spalling ◽  
Strength Concrete ◽  
High Strength Concrete Columns

A reliability analysis was conducted on high-strength concrete (HSC) columns during a fire. The influences of fire’s randomness and explosive spalling of concrete were investigated. The fire resistance for axial loading capacity of HSC columns was in terms of steel yield strength and concrete compressive strength with considering the effect of elevated temperatures. The load random variables included dead load and sustained live load. The JC method was applied to calculate the reliability index of the fire resistance of axially loaded HSC columns. It was found that the randomness of fire and explosive spalling of concrete had a significant influence on reliability of HSC columns.

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