Assessment of in-service stresses in steel bridges for high-frequency mechanical impact applications
Journal article, 2021

The application of high-frequency mechanical impact (HFMI) treatment to improve the fatigue performance of composite steel and concrete road bridges was studied through a state-of-the-art review in conjunction with simulations of variable amplitude in-service stresses in four case-study bridges in Sweden. Empirical stress range spectra with associated mean stresses were characterised for HFMI-treated bridges. It was shown that the fatigue-critical locations in HFMI-treated bridges remain unchanged compared with conventional bridges and that compressive overloads pose no detrimental effect that requires additional attention in the fatigue assessment. Calculations also showed a considerably better fatigue performance if HFMI treatment is performed on-site, after the application of self-weight stresses.




Mean stress

Variable amplitude



Poja Shams Hakimi

WSP Sverige

Fredrik Carlsson

WSP Sverige

Mohammad al-Emrani

Chalmers, Architecture and Civil Engineering, Structural Engineering

Hassan al-Karawi

Chalmers, Architecture and Civil Engineering, Structural Engineering

Engineering Structures

01410296 (ISSN) 18737323 (eISSN)

Vol. 241 112498

Sustainable Design of Fatigue-Loaded Steel Structures

Formas (2014-638), 2015-01-01 -- 2018-12-31.

LifeExt - Livslängdsförlängning för befintliga stålbroar

Swedish Transport Administration (TRV 2018/27547), 2018-05-15 -- 2020-11-30.

VINNOVA (2017-02670), 2017-06-08 -- 2019-12-31.

Driving Forces

Sustainable development

Subject Categories

Construction Management

Infrastructure Engineering

Building Technologies



More information

Latest update