Abstract
Over recent years, concrete-filled steel tubular (CFST) sections have been considered as a popular approach for the construction of new infrastructures as well as strengthening and repairing critical structural components such as joints. In contrast to the ultimate capacity of CFST sections, however, the fatigue performance of these members, especially CFST joints, has not been studied adequately. Therefore, this paper aims to provide a comprehensive review and statistical analysis on the available experimental fatigue data of CFTS joints and as well as to explore research gaps in this field. To this aim, firstly, fatigue design approaches that can be used for welded connections are briefly presented. Secondly, a fatigue database for these joints is developed through reviewing experimental fatigue studies of CFST joints and the outcomes are summarized based on crack propagation, failure modes, proper fatigue criteria, and the effect of concrete core. Finally, the fatigue database is used to generate basic S–N curves through the deterministic and least-squares method with and without considering the effect of tube wall thickness and the resultant curves are also discussed with respect to available design guidelines for empty tubular joints. Further experimental fatigue tests and finite element analyses are required to more accurately estimate the fatigue performance of CFST joints via hot-spot approach and improve the proposed basic hot-spot S–N curves.
| Original language | English |
|---|---|
| Article number | 105749 |
| Journal | Journal of Constructional Steel Research |
| Volume | 162 |
| DOIs | |
| Publication status | Published - Nov 2019 |
Fingerprint
Cite this
}
Fatigue performance and design of concrete-filled steel tubular joints : A critical review. / Dehghani, Ayoub; Aslani, Farhad.
In: Journal of Constructional Steel Research, Vol. 162, 105749, 11.2019.Research output: Contribution to journal › Review article
TY - JOUR
T1 - Fatigue performance and design of concrete-filled steel tubular joints
T2 - A critical review
AU - Dehghani, Ayoub
AU - Aslani, Farhad
PY - 2019/11
Y1 - 2019/11
N2 - Over recent years, concrete-filled steel tubular (CFST) sections have been considered as a popular approach for the construction of new infrastructures as well as strengthening and repairing critical structural components such as joints. In contrast to the ultimate capacity of CFST sections, however, the fatigue performance of these members, especially CFST joints, has not been studied adequately. Therefore, this paper aims to provide a comprehensive review and statistical analysis on the available experimental fatigue data of CFTS joints and as well as to explore research gaps in this field. To this aim, firstly, fatigue design approaches that can be used for welded connections are briefly presented. Secondly, a fatigue database for these joints is developed through reviewing experimental fatigue studies of CFST joints and the outcomes are summarized based on crack propagation, failure modes, proper fatigue criteria, and the effect of concrete core. Finally, the fatigue database is used to generate basic S–N curves through the deterministic and least-squares method with and without considering the effect of tube wall thickness and the resultant curves are also discussed with respect to available design guidelines for empty tubular joints. Further experimental fatigue tests and finite element analyses are required to more accurately estimate the fatigue performance of CFST joints via hot-spot approach and improve the proposed basic hot-spot S–N curves.
AB - Over recent years, concrete-filled steel tubular (CFST) sections have been considered as a popular approach for the construction of new infrastructures as well as strengthening and repairing critical structural components such as joints. In contrast to the ultimate capacity of CFST sections, however, the fatigue performance of these members, especially CFST joints, has not been studied adequately. Therefore, this paper aims to provide a comprehensive review and statistical analysis on the available experimental fatigue data of CFTS joints and as well as to explore research gaps in this field. To this aim, firstly, fatigue design approaches that can be used for welded connections are briefly presented. Secondly, a fatigue database for these joints is developed through reviewing experimental fatigue studies of CFST joints and the outcomes are summarized based on crack propagation, failure modes, proper fatigue criteria, and the effect of concrete core. Finally, the fatigue database is used to generate basic S–N curves through the deterministic and least-squares method with and without considering the effect of tube wall thickness and the resultant curves are also discussed with respect to available design guidelines for empty tubular joints. Further experimental fatigue tests and finite element analyses are required to more accurately estimate the fatigue performance of CFST joints via hot-spot approach and improve the proposed basic hot-spot S–N curves.
KW - CFST joints
KW - Fatigue
KW - Hot-spot stress
KW - Least-squares method
KW - S-N curves
UR - http://www.scopus.com/inward/record.url?scp=85071479998&partnerID=8YFLogxK
U2 - 10.1016/j.jcsr.2019.105749
DO - 10.1016/j.jcsr.2019.105749
M3 - Review article
VL - 162
JO - Journal of Constructional Steel Research
JF - Journal of Constructional Steel Research
SN - 0143-974X
M1 - 105749
ER -