High-cycle variable amplitude fatigue experiments and design framework for bridge welds with high-frequency mechanical impact treatment
Journal article, 2022

Fatigue enhancement by way of high-frequency mechanical impact (HFMI) treatment can enable effective design and construction of steel bridges. However, bridges may experience high and varying mean stresses, the effects of which are not covered today by any design recommendation or in the literature on HFMI-treated joints. In this study, fatigue experiments were conducted with realistic in-service bridge loading, which revealed the same high fatigue performance as for constant amplitude loading. The effect of mean stress in spectrum loading was quantified and a method to account for it in an equivalent manner is proposed. A design framework has been developed for design and engineering purposes.

variable amplitude

composite construction

bridge

Experiments

steel bridges

mean stress

Analysis and design

Design

Fatigue enhancement

Author

Poja Shams Hakimi

WSP Group

Hassan al-Karawi

Chalmers, Architecture and Civil Engineering, Structural Engineering

Mohammad al-Emrani

Chalmers, Architecture and Civil Engineering, Structural Engineering

Steel Construction

18670520 (ISSN) 18670539 (eISSN)

Rekomendationer för HFMI-behandling av stålbroar - utveckling av dimensioneringsmetoder och tekniska kravspecifikationer

Swedish Transport Administration (TRV 2020-68167), 2020-07-01 -- 2022-06-30.

Areas of Advance

Transport

Materials Science

Subject Categories

Aerospace Engineering

Applied Mechanics

Building Technologies

DOI

10.1002/stco.202200003

More information

Latest update

1/3/2024 9