增大截面法加固RC柱耐火性能有限元分析  

Finite Element Analysis of Fire Resistance Performance of RC Column by Enlarged Section Method

作　　者：温凯 刘猛 许兆友 张之骁 WEN Kai;LIU Meng;XU Zhao-you;ZHANG Zhi-xiao(School of Civil Engineering and Architecture,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121001

出　　处：《辽宁工业大学学报（自然科学版）》2021年第3期184-187,194,共5页Journal of Liaoning University of Technology(Natural Science Edition)

摘　　要：为研究增大截面法加固钢筋混凝土柱的耐火性能,采用大型通用分析软件ABAQUS建立增大截面法加固钢筋混凝土柱有限元模型,分析了轴压比、配筋率、加固层厚度、荷载比等参数对增大截面法加固RC柱耐火性能的影响。分析结果表明,随着轴压比和荷载比的增加,加固柱的耐火极限减小;增加加固层的厚度有利于提高加固柱的耐火极限;增加截面配筋率,加固柱的耐火极限增加,但增加幅度有限。In order to study the fire resistance performance of reinforced concrete columns by the enlarged section method,a large-scale general analysis software ABAQUS was used to establish a finite element model of reinforced concrete columns by the enlarged section method,and the influence of axial compression ratio,reinforcement ratio,reinforcement layer thickness,load ratio and other parameters on the fire resistance performance of reinforced concrete column by enlarged section method was analyzed.The results show that as the axial compression ratio and load ratio increase,the fire resistance limit of the reinforced column decreases;increasing the thickness of the reinforcement layer is beneficial to increase the fire resistance limit of the reinforced column;increasing the section reinforcement ratio increases the fire resistance limit of the reinforced column,but the increase is limited.

关 键 词：增大截面法加固 钢筋混凝土柱 耐火极限 有限元分析 

分 类 号：TU375.3[建筑科学—结构工程]