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作者:

Yan, Xi-Feng (Yan, Xi-Feng.) | Hassanein, M. F. (Hassanein, M. F..) | Wang, Fangying (Wang, Fangying.) | Lin, Siqi (Lin, Siqi.)

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摘要:

Ferritic stainless steel achieves a lower and steady price level due to low nickel content compared to duplex and austenitic stainless steels. Accordingly, the combination of ferritic stainless steel tube and concrete will have better application prospects in corrosive marine environments. However, the structural application of concrete-filled ferritic stainless steel tube (CFFSST) members is still limited due to the absence of performance data and design guidelines. Accordingly, this paper aims to comprehensively investigate the behaviour of eccentrically loaded concrete-filled rectangular ferritic stainless steel tubular (CFRFSST) slender columns using the nonlinear finite element (FE) method, and develop a suitable design method. Two different material models were introduced to simulate corner and flat regions of rectangular ferritic stainless steel tube. Good consistency was found between the simulation and experimental results against the failure mode, ultimate load and moment, and axial load versus mid-height deflection curves for eccentrically loaded CFRFSST slender columns. This is followed by the mechanism analysis and parameter study of the studied CFRFSST columns, which revealed that the longitudinal stress and Mises stress show significant changes perpendicular to the loading line direction, while there is almost no change along the loading line direction. In addition, the initial stiffness and ultimate load increased by increasing the cross-sectional aspect ratio, yield stress and concrete strength, while they decreased as the eccentricity ratio, slenderness ratio and width-tothickness ratio increased. The outputs of the FE analysis and existing experimental results were used to examine the applicability of current design codes for designing the studied CFRFSST columns. The results demonstrated an unexpected deviation generated in the design predictions. At the end, a new design method for eccentrically loaded CFRFSST slender columns was proposed which achieved better predictive consistency.

关键词:

Ferritic stainless steel Concrete-filled steel tube (CFST) Finite element model Ductility Minor axis

作者机构:

  • [ 1 ] [Yan, Xi-Feng]Xian Univ Architecture & Technol, Sch Civil Engn, Xian 710055, Peoples R China
  • [ 2 ] [Yan, Xi-Feng]Minist Educ XAUAT, Key Lab Struct Engn & Earthquake Resistance, Xian 710055, Peoples R China
  • [ 3 ] [Hassanein, M. F.]Tanta Univ, Fac Engn, Dept Struct Engn, Tanta, Egypt
  • [ 4 ] [Hassanein, M. F.]Xihua Univ, Sch Architecture & Civil Engn, Chengdu 610039, Peoples R China
  • [ 5 ] [Wang, Fangying]Univ Nottingham, Dept Civil Engn, Nottingham, England
  • [ 6 ] [Lin, Siqi]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • [Hassanein, M. F.]Tanta Univ, Fac Engn, Dept Struct Engn, Tanta, Egypt;;[Wang, Fangying]Univ Nottingham, Dept Civil Engn, Nottingham, England;;

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来源 :

CASE STUDIES IN CONSTRUCTION MATERIALS

ISSN: 2214-5095

年份: 2024

卷: 21

6 . 2 0 0

JCR@2022

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