防灾减灾工程学报2017，Vol.37Issue(5)：848-854,7.DOI:10.13409/j.cnki.jdpme.2017.05.023
有侧移钢筋混凝土方柱的耐火极限分析
Analysis of Fire Endurance of Reinforced Concrete Columns with Sideway
摘要
Abstract
By using the computer program SAFIR for analysis of reinforced concrete structures in fire,a comparison between the fire endurance of frame columns and that of independent column has been conducted,and the numerical model of the column with sideway is verified.Then,the influences of lateral-displacement factor,sectional dimensions of column,axial load ratio,and reinforcement ratio on the fire resistance reduction coefficient (FRRC) of square column with sideway have been numerically studied,and a regressive formula is proposed to determine the FRRC.It is found that:(a) when the column's sideway is large,the fire endurance of frame column is remarkable lower than that of independent column;(b) with the increasing of the lateral-displacement factor,the FRRC decreases gradually,especially when the sectional dimensions of the column is bigger,the effect of the lateral-displacement factor is more significant;(c) the FRRC reduces gradually with the increasing of the sectional dimensions of the column,and the greater the lateral-displacement factor,the faster the rate of reduction of the FRRC;and (d) with the increasing of the axial load ratio,the FRRC decreases gradually on the whole,but the effect of the reinforcement ratio on the FRRC is relatively negligible.关键词
钢筋混凝土/柱/水平侧移/耐火极限Key words
reinforced concrete/column/sideway/fire endurance分类
建筑与水利引用本文复制引用
吴波,陈海巨..有侧移钢筋混凝土方柱的耐火极限分析[J].防灾减灾工程学报,2017,37(5):848-854,7.基金项目
国家十三五重点研发计划课题(2016YFC0701203)、国家自然科学基金项目(51378225)资助 （2016YFC0701203）
