“T”形钢管混凝土芯柱耐火极限数值分析  

Fire resistance numerical analysis of concrete-filled steel tube core of T-shaped cross section

作　　者：张玉琢[1] 刘海卿[1] 吕学涛[1] 

机构地区：[1]辽宁工程技术大学建筑工程学院,中国阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2014年第2期198-202,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：辽宁省自然科学基金资助项目(20102091);国家青年自然科学基金资助项目(51208246)

摘　　要：为研究等肢"T"形钢管混凝土芯柱的耐火极限及其影响因素,采用有限元分析软件ABAQUS建立等肢"T"形钢管混凝土芯柱高温反应分析模型,在验证模型可靠性基础上,分析了载荷比、截东边长、长细比、载荷偏心率、含钢率等主要因素对"T"形钢管混凝土芯柱耐火极限的影响.研究结果表明:在一定参数范围内,载荷比和截面边长是构件耐火极限的主要影响参数,载荷比越小,截面边长越大,构件的耐火极限越高;长细比和载荷偏心率对其影响较大,长细比和载荷偏心率越小,构件的耐火极限越高;含钢率对其影响不显著.This paper studied fire resistance and the influencing factor of concrete-filled steel tube core of T-shaped cross section. High temperature reaction analysis model of concrete-filled steel tube core of T-shaped cross section was built by the finite element analysis of ABAQUS. Based on the verification of model reliability, this study analyzed load ratio, sectional width, slenderness ratio, load eccentricity and steel ratio on the T-shaped steel core columns fire resistance of concrete impact. The results of study show that in a certain range of parameters, the fire resistance of the main component influencing parameters is load ratio and cross-sectional dimensions. The smaller the load ratio, and the larger the t cross-sectional dimension is larger, the higher the fire resistance components. The slenderness ratio and load eccentricity have greater impact on its fire resistance, and steel ratio has no significant effect on its fire resistance.

关 键 词：钢管混凝土 芯柱 “T”形截面 耐火极限 温度场 力学性能 参数分析 ABAQUS 

分 类 号：TU352.5[建筑科学—结构工程]