Title :
Residual strength of reinforced concrete columns with +-shaped cross section after exposure to fire
Author :
Yu-ye, Xu ; Qing-Wen, Yang
Author_Institution :
State Key Lab. of Subtropical Building Sci., South China Univ. of Technol., Guangzhou, China
Abstract :
The practical calculation method for the residual strength of reinforced concrete columns with +-shaped cross section after exposure to ISO834 standard fire is investigated. Using a numerical program CAFIRE, the influence of several parameters, such as exposure times, effective lengths, sectional thicknesses, ratios of sectional height to sectional thickness, load eccentricity ratios, reinforcement ratios, load angles and longitudinal reinforcement yield strength on the residual strength of RC columns with +-shaped cross section after exposure to fire is analyzed. 14580 columns with +-shaped cross section and subjected to fire in all sides were selected for residual strength analyses. Based on the calculation results, a simplified calculation method is proposed for the residual strength of +-shaped columns after exposure to ISO834 standard fire.
Keywords :
ISO standards; construction components; fires; mechanical strength; reinforced concrete; +-shaped cross section; CAFIRE numerical program; ISO 834 standard fire; effective lengths; exposure times; load angles; load eccentricity ratio; longitudinal reinforcement yield strength; reinforced concrete column; reinforcement ratio; residual strength; sectional height; sectional thicknesses; Bars; Concrete; Fires; Laboratories; Resistance; Simulation; column; fire; practical calculation; reinforced concrete; residual strength;
Conference_Titel :
Consumer Electronics, Communications and Networks (CECNet), 2011 International Conference on
Conference_Location :
XianNing
Print_ISBN :
978-1-61284-458-9
DOI :
10.1109/CECNET.2011.5769418
