长期荷载作用下不锈钢管混凝土轴压柱力学性能的有限元分析  

Finite Element Analysis on Mechanical Property of Axial-Column of Concrete-Filled Stainless Steel Tube Subjected to Long-Term Sustained Loading

作　　者：方欣欣 林庚平 FANG Xinxin;LIN Gengping(Jinshan College,Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China)

机构地区：[1]福建农林大学金山学院,福建福州350002

出　　处：《江汉大学学报（自然科学版）》2017年第6期551-557,共7页Journal of Jianghan University：Natural Science Edition

摘　　要：基于有限元法建立了在长期荷载作用下不锈钢管混凝土轴压柱的分析模型,计算结果与试验结果进行了验证,同时对是否考虑长期荷载影响的轴压柱的荷载-变形曲线以及构件材料的相互作用力等进行了对比分析。通过分析发现:长期荷载作用下不锈钢混凝土轴压柱的承载力提高且对应的轴向位移增大,同时延缓了钢管与核心混凝土之间的相互作用。A nonlinear finite element analysis(FEA)was developed to simulate the axial-column of concrete-filled stainless steel tube(CFST)subjected to long-term sustained loading;the established FEA was verified by experiment in this paper.With FEA,the influence of long-term loading on the mechanical behavior of the CFST axial-column was researched in terms of the relationship between load and deformation,and the interaction of specimen materials was studied,the behavior of the CFST axial-column with long-term loading was compared with that of the CFST axial-column without longterm loading.The results showed that the long-term sustained loading increased the bearing capacity of CFST axial-column and increased corresponding axial deformation,and delayed the occurrence of interaction between stainless steel tube and core concrete.

关 键 词：不锈钢管混凝土 长期荷载 轴压柱 有限元法 力学性能 

分 类 号：TU375[建筑科学—结构工程] TU973.12