Testing and numerical modelling of circular CFDST cross-sections with stainless steel outer tubes in bending

被引:29
|
作者
Wang, Fangying [1 ]
Young, Ben [2 ]
Gardner, Leroy [3 ]
机构
[1] Univ Nottingham, Dept Civil Engn, Nottingham, England
[2] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
[3] Imperial Coll London, Dept Civil & Environm Engn, London, England
关键词
CFDST; Composite structures; Experiments; Four-point bending tests; Moment capacities; Numerical modelling; Stainless steel; SKIN SHS OUTER; STUB COLUMNS; ANALYTICAL BEHAVIOR; FLEXURAL BEHAVIOR; TUBULAR MEMBERS; STRENGTH STEEL; CONCRETE; DESIGN; INNER; CHS;
D O I
10.1016/j.engstruct.2021.113170
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The structural performance of circular concrete-filled double skin tubular (CFDST) cross-sections with stainless steel outer tubes has been examined herein based on experiments and numerical modelling. A laboratory testing programme comprising a total of 22 four-point bending tests was performed on seven CFDST cross-sections with varying concrete grades. The details of the test rig and procedures, as well as the key test observations, including the failure moment capacities, moment-curvature curves and failure modes, are fully reported. A numerical modelling programme was then carried out; a finite element (FE) model was first established to replicate the test observations, and then adopted to conduct a parametric study to acquire further FE data over a broader spectrum of material strengths and cross-section slendernesses. Based on the combined set of test and FE results, the general design provisions for concrete-filled carbon steel members in the current European and American design codes were evaluated for their applicability to the studied CFDST cross-sections. Overall, the results revealed that both of the examined design codes yield unduly conservative (less so for the higher concrete grades) and scattered moment resistance predictions, though some moment resistances predicted from the European code were on the unsafe side. Modifications, including a concrete reduction factor eta to reflect the reduced relative effectiveness of using higher concrete grades and a modified stress distribution considering the partial spread of plasticity, were proposed and shown to improve the consistency of the resistance predictions. Finally, the reliability of the current and modified design rules was demonstrated through statistical analyses.
引用
收藏
页数:14
相关论文
共 50 条
  • [41] Behaviour and design of stainless steel slender cross-sections subjected to combined loading
    Anwar-Us-Saadat, Mohammad
    Ashraf, Mahmud
    Ahmed, Shameem
    THIN-WALLED STRUCTURES, 2016, 104 : 225 - 237
  • [42] DISPLACEMENT CROSS-SECTIONS FOR IRON, CHROMIUM, NICKEL, STAINLESS-STEEL, AND TANTALUM
    DORAN, DG
    NUCLEAR SCIENCE AND ENGINEERING, 1973, 52 (03) : 398 - 402
  • [43] Design of stainless steel cross-sections with outstand elements under stress gradients
    Gkantou, Michaela
    Bock, Marina
    Theofanous, Marios
    JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, 2021, 179
  • [44] Full slenderness range DSM approach for stainless steel hollow cross-sections
    Arrayago, I.
    Rasmussen, K. J. R.
    Real, E.
    JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, 2017, 133 : 156 - 166
  • [45] Reliable Adaptive Modelling of Vascular Structures with Non-Circular Cross-Sections
    Kretschmer, Jan
    Beck, Thomas
    Tietjen, Christian
    Preim, Bernhard
    Stamminger, Marc
    COMPUTER GRAPHICS FORUM, 2012, 31 (03) : 1055 - 1064
  • [46] Design of circular steel arches with hollow circular cross-sections according to EC3
    Dimopoulos, C. A.
    Gantes, C. J.
    JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, 2008, 64 (10) : 1077 - 1085
  • [47] Stainless steel channel sections under combined compression and minor axis bending - Part 1: Experimental study and numerical modelling
    Liang, Yating
    Zhao, Ou
    Long, Yue-ling
    Gardner, Leroy
    JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, 2019, 152 : 154 - 161
  • [48] Numerical modelling and shear design rules of stainless steel lipped channel sections
    Dissanayake, D. M. M. P.
    Poologanathan, K.
    Gunalan, S.
    Tsavdaridis, K. D.
    Nagaratnam, B.
    Wanniarachchi, K. S.
    JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, 2020, 168
  • [49] Ultimate capacity of structural steel cross-sections under compression, bending and combined loading
    Liew, Andrew
    Gardner, Leroy
    STRUCTURES, 2015, 1 : 2 - 11
  • [50] Numerical modelling of concrete-filled stainless steel elliptical hollow sections
    Lam, D.
    Dai, X.
    TUBULAR STRUCTURES XIII, 2010, : 323 - 331