Effect of welding residual stress on the performance of CFST tubular joints

Jin, Dengyiding1; Hou, Chao2,3; Shen, Luming1

2021-09-01

10.1016/j.jcsr.2021.106827

JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH   影响因子和分区

0143-974X

1873-5983

The residual stress and the dimensional distortion due to rapid temperature variation during the welding process are often crucial for the life-cycle behavior of structures, especially for key connection regions in offshore and marine applications. This paper evaluates the detailed welding effects on the strength and stiffness of concrete -filled steel tubular (CFST) Y-and K-joints using advanced finite element modeling (FEM), and the results are then validated and compared with collected test data. A prescribed temperature approach, Abaqus Welding Interface (AWI) and a tailored shell-solid modeling technique are adopted to facilitate the simulation of welding heat generation as well as the associated residual stress. The results are then implemented into the numerical models before defining boundary and loading conditions according to related tests for careful validation and full-range analysis. With the help of the established advanced modeling technique, the accuracy of the predicted stiffness for CFST Y-and K-joints is greatly improved. Parametric study indicates that the brace to chord thickness ratio stands out as a governing factor in the joint failure. The joint strength and stiffness decrease moderately when the weld leg thickness is reduced, whilst a lower and smaller region of residual stress is induced. (c) 2021 Elsevier Ltd. All rights reserved.

Welding effects Abaqus welding interface (AWI) Residual stress Finite element modeling (FEM) Concrete-filled tubular joints

SCI ; EI

英语

通讯

Shenzhen Science and Technology Innovation Commission[20200925 154412003]

Construction & Building Technology ; Engineering

Construction & Building Technology ; Engineering, Civil

WOS:000687248600006

ELSEVIER SCI LTD

20212710587731

ABAQUS ; Concretes ; Joints (structural components) ; Life cycle ; Residual stresses ; Stiffness ; Stress analysis ; Welding

Structural Members and Shapes:408.2 ; Concrete:412 ; Welding:538.2 ; Computer Applications:723.5 ; Mathematics:921 ; Numerical Methods:921.6 ; Materials Science:951

ENGINEERING

Web of Science

1.Univ Sydney, Sch Civil Engn, Sydney, NSW 2006, Australia
2.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China
3.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511485, Peoples R China

Jin, Dengyiding,Hou, Chao,Shen, Luming. Effect of welding residual stress on the performance of CFST tubular joints[J]. JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH,2021,184.

Jin, Dengyiding,Hou, Chao,&Shen, Luming.(2021).Effect of welding residual stress on the performance of CFST tubular joints.JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH,184.

Jin, Dengyiding,et al."Effect of welding residual stress on the performance of CFST tubular joints".JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH 184(2021).