Time-dependent behavior of concrete-filled steel tube considering initial stress and bond-slip effect

被引：0
|
作者：
Wang Y.-B. [1 ]
Zhao R.-D. [2 ]
Wu D.-B. [2 ]
机构：
[1] College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan
[2] School of Civil Engineering, Southwest Jiaotong University, Chengdu
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2018年 / 52卷 / 12期
关键词：
Bond-slip; Concrete filled steel tube; Creep deformation; Initial stress; Steel tube yield;
D O I：
10.3785/j.issn.1008-973X.2018.12.008
中图分类号：
学科分类号：
摘要：
A three-dimensional finite element model of concrete filled steel tube (CFST), considering initial steel stress, yield and bond-slip effect, was established by the ANSYS program to analyze the time-dependent behavior of CFST. The correctness to simulate the initial stress and bond slip effect of the steel tube was verified; the influence of the above three factors on the shrinkage and creep deformation and stress redistribution of the CFST was studied with several examples. All the results show that the initial stress does not affect the stress redistribution of CFST if the steel is in elastic stage after the concrete shrinkage and creep, and if the steel tube yields after the concrete shrinkage and creep, the stress redistribution stops, but the deformation rate increases. Therefore, more attention should be paid to the deformation. Before calculating the time-dependent behavior of CFST, whether the bond slip effect between the steel tube and core concrete should be considered or not is according to constraint conditions. If the bottom of CFST is constrained both in core concrete and steel tube, the complete bond assumption is reasonable; if it is only confined in core concrete, the bond-slip effect should be taken into consideration. © 2018, Zhejiang University Press. All right reserved.
引用
收藏
页码：2306 / 2313and2381
相关论文
共 25 条
  • [1] Ding M., Wang Y.-D., Dai C.-H., Et al., Creep calculation and behavior analysis of concrete-filled steel tubular member under axial compression, Engineering Mechanics, 34, 6, pp. 166-177, (2017)
  • [2] Chen B.C., Lai Z.C., Varma A.H., Et al., Creep prediction models for concrete-filled steel tube arch bridges, Journal of Bridge Engineering, 22, 7, pp. 1-15, (2017)
  • [3] Wang Y.-B., Study on long-term behavior of long span concrete arch bridge with stiffened concrete filled steel tube in natural environment, (2017)
  • [4] Zhang X.-Q., Zhong S.-T., Yan S.-Z., Et al., Experimental study about the effect of initial stress on bearing capacity of concrete filled steel tubular members under eccentric compression, Journal of Harbin University of C.E. and Architecture, 3, 1, pp. 50-56, (1997)
  • [5] Wang Y.Y., Geng Y., Ranzi G., Et al., Time-dependent behavior of expansive concrete-filled steel tubular columns, Journal of Constructional Steel Research, 67, 3, pp. 471-483, (2011)
  • [6] Han L.H., Tao Z., Liu W., Effects of sustained load on concrete-filled hollow structural steel columns, Journal of Structural Engineering, 130, 9, pp. 1392-1404, (2004)
  • [7] Wang Y.-Y., Geng Y., Zhang S.-M., Research on long-term deformation of concrete-filled steel tubular stubs with expansive additive under axial loading, China Journal of Highway and Transport, 24, 6, pp. 57-63, (2011)
  • [8] Wang Y.-B., Zhao R.-D., Xu T.-F., Et al., Study on simplified creep calculation method of CFST members under axial loading, Journal of Highway and Transportation Research and Development, 33, 1, pp. 57-63, (2016)
  • [9] Zhao J.-G., Zhao R.-D., Zhan Y.-L., Comparative analysis of creep calculation methods and creep models for axially compressed CFST members, Journal of Highway and Transportation Research and Development, 30, 4, pp. 46-52, (2013)
  • [10] Liu H.W., Wang Y., He M., Strength and ductility performance of concrete-filled steel tubular columns after long-term service loading, Engineering Structure, 100, pp. 308-325, (2015)
123