Prediction of ultralow cycle fatigue damage of thin-walled steel bridge piers

0549841 - ÚTAM 2022 RIV CN eng J - Journal Article
Tang, Z.-Z. - Xue, H.-Y. - Liu, H. - Zhang, Wei
Prediction of ultralow cycle fatigue damage of thin-walled steel bridge piers.
Advanced Steel Construction. Roč. 17, č. 4 (2021), s. 403-411. ISSN 1816-112X
Institutional support: RVO:68378297
Keywords : cyclic void growth model * damage index * structural steel * structural steel * ultralow cycle fatigue
OECD category: Civil engineering
Impact factor: 1.313, year: 2021
Method of publishing: Open access
https://doi.org/10.18057/IJASC.2021.17.4.9

Ultralow cycle fatigue (ULCF) failure was first observed on steel bridge piers in the Kobe earthquake, and the ultimate strength and ductility evaluation formulas of thin-walled steel bridge piers were established. In this study, parametric analysis of steel piers was carried out to study the influence of the structural parameters on the ULCF damage evolution. The evolution of the ULCF damage of the base metal, the deposited metal, and the heat-affected zones was studied based on two types of steel piers with hollow box and pipe sections. Then, practical formulas to predict the ULCF damage level of steel piers under cyclic loading were proposed. Finally, the proposed formulas were validated by comparisons with the experimental results. The results show that the heat-affected zone is more vulnerable to ULCF failure than the base metal and the deposited metal. Moreover, the practical formulas to predict the ULCF damage index of the steel piers under cyclic loading were proposed, and the formulas effectively predicted the ULCF crack of the steel piers.
Permanent Link: http://hdl.handle.net/11104/0325748