Evaluation of HFMI as a Life Extension Technique for Welded Bridge Details
Paper i proceeding, 2019

Published by Elsevier B.V. In this current study, HFMI technique is used to study the possibility to extend the fatigue life of pre-fatigued flange gusset welds typically found in girder bridges. The results from the study are also compared with results found in the literature for other more conventional techniques for retrofitting, e.g. cut-outs. The study also aims to investigate if the IIW HFMI recommendations could be applied for existing steel structures and that equal fatigue strength improvement could be claimed for prefatigued structures. Furthermore, new recommendations for structural hot spot stress type B are suggested for HFMI treated welds, applicable to flange guest welds. The results indicate that the HFMI could be used for welded bridge details rehabilitation as a competing technology with conventional cut-out. Furthermore, the results indicate that the IIW recommendations for HFMI fatigue strength improvement could also be applied for pre-fatigued welded details. © 2019 The Authors.

improvement technique

Life extension



Welded joints


M. Edgren

Kungliga Tekniska Högskolan (KTH)

DEKRA Industrial AB

Zuheir Barsoum

Chalmers, Arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik

Kungliga Tekniska Högskolan (KTH)

K. Åkerlind

Kungliga Tekniska Högskolan (KTH)

Mohammad al-Emrani

Chalmers, Arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik

Procedia Structural Integrity

24523216 (eISSN)

Vol. 19 73-80

Fatigue Design 2019 - 8th edition of the International Conference on Fatigue Design
Senlis, France,


Bearbetnings-, yt- och fogningsteknik

Annan materialteknik

Metallurgi och metalliska material



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