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Title: Rehabilitation of Welded Joints by Ultrasonic Impact Treatment (UIT)
Author: Gunther, Kuhlmann, Durr
Source: IABSE Symposium Lisbon 2005
Publication year 2005
Document number: 2005132
Number of pages: 7
Abstract:
Summary Due to the increasing traffic and life loading fatigue becomes of high relevance in order to maintain the integrity of existing steel bridge structures. Poor
construction details which used to be regarded as less important when applied e.g. to road bridges are nowadays often the starting point of fatigue cracks. Repair and
strengthening of welded details are thus of great importance in order to extend the life time and safety of existing bridges. For welded details under fatigue loading one
effective possibility to do this is the application of local post-weld treatment methods. This paper presents the application of a relatively new post-weld treatment method
called “Ultrasonic Impact Treatment” (UIT). The paper summarizes the results obtained on a series of experimental fatigue tests where UIT has been applied in order to extend
the life time of partially damaged non load carrying fillet welded joints. Keywords: Fatigue cracks, post-weld treatment methods, fatigue life extension, welded joints,
strengthening of welded structures, ultrasonic impact treatment
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This page last revised: 04/24/2008