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首页> 外文期刊>Romanian Journal of Transport Infrastructure >New And Existing Bridge Constructions - Increase of Fatigue Strength of Welded Joints by High Frequency Mechanical Impact Treatment
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New And Existing Bridge Constructions - Increase of Fatigue Strength of Welded Joints by High Frequency Mechanical Impact Treatment

机译：新的和现有的桥梁结构-通过高频机械冲击处理提高焊接接头的疲劳强度

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Numerous studies at KIT prove that high frequency mechanical impact (HFMI) treatment is an efficient method for increasing the fatigue strength of welded steel structures. Within different research projects it was found that HFMI-methods can be used successfully for new and existing structures in order to extend the fatigue life. This paper gives an overview of the current status of existing steel bridges in Germany regarding aspects like bridge age distributions and traffic loads. Based on that overview welded joints susceptible to fatigue failure are identified. Using component-like small scale specimens, HFMI-methods were investigated within the objective of implementing an effective application for new and existing structures. Applying the fatigue test data observed, existing design proposals are evaluated and design recommendations for HFMI-treated joints are given. As a result of the research work, a transfer into practice has been realized and different applications are illustrated using the example of bridge constructions made of steel.
机译：KIT的大量研究证明，高频机械冲击（HFMI）处理是提高焊接钢结构疲劳强度的有效方法。在不同的研究项目中，发现HFMI方法可以成功用于新的和现有的结构，以延长疲劳寿命。本文就桥龄分布和交通负荷等方面，概述了德国现有钢桥的现状。基于此概述，确定了易疲劳破坏的焊接接头。使用类小规模的标本，对HFMI方法进行了研究，目的是对新的和现有的结构实施有效的应用。应用观察到的疲劳测试数据，评估现有的设计建议，并给出针对HFMI处理的接头的设计建议。作为研究工作的结果，已经实现了向实践的转化，并以钢制桥梁结构为例说明了不同的应用。

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