摘要
为研究高温后中空夹层钢管混凝土压弯构件的滞回性能,采用合理的本构关系,建立有限元模型,分析参数主要有轴压比、温度、内钢管屈服强度等,与试验结果比较,吻合较好。通过对高温后中空夹层钢管混凝土柱滞回性能的机理分析,结果表明:构件的耗能能力和位移延性系数均随着轴压比和温度的增加而减小;在加载的前期刚度退化较快,到后期刚度退化趋于平缓;构件的侧向承载力随着轴压比和温度的增加而减小,曾经历900℃高温后承载力下降50%以上;而内钢管的屈服强度对构件的刚度、延性、承载力等无显著影响。
In order to study the hysteretic behavior of concrete filled double skin steel tubular after high tempera-ture, this paper choosed a reasonable constitutive model and established a reasonable finite model. There aremany analysis parameters, such as the axial load ratio, the temperature and the yield strength of the inner steeltube and so on. Compared with the test,the results are in good agreement . The results showe that the energy dis-sipation capacity and the displacement ductility factor decrease with increasing temperature and axial load ratio.Stiffness degradation was faster at the early loading, but it slows down at last. The bearing capacity of the artifactsdecreases with the axial compression and the temperature increasing. After 900℃ high temperature, the bearingcapacity decreases more than 50% But the yield strength of the inner steel tube have little effect on the stiff-ness, ductility and the bearing capacity.
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2016年第3期529-537,共9页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(51308347)
辽宁省百千万人才资助项目(2013921001)
沈阳市科技攻关项目(F13171900)
关键词
高温后
滞回性能
中空夹层钢管混凝土
耗能能力
刚度
延性
after high temperature
hysteretic behavior
concrete filled double skin steel tubular
energy dissipa-tion capacity
stiffness
ductility
