Non-destructive testing methods became popular within the last few years. For steel beams incorporated in buildings there are currently only destructive ways for testing the yield limit as well as for determination of the current stress level. Rise of ultrasonic and micro-magnetic tools for (non-destructive) measurements allows the characterization of the inbuilt material especially of old steel bridges as economical maintenance of the infrastructure. It is possible to determine the reserve of residuence of bridges or of any other existing steel buildings in order to upgrade them competitively for future usage by the possibility of a simple way of strengthening by welding or using bolds. This is done using modern devices for ultrasonic and micro magnetic data recording on the one hand and modern techniques from nonparametric statistics such as sieve, partition and semi-recursive estimators on the other hand.

中文翻译：

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通过无损检测方法表征钢结构建筑物

在最近几年中，无损检测方法开始流行。对于结合在建筑物中的钢梁，目前只有破坏性的方法来测试屈服极限以及确定当前应力水平。用于（非破坏性）测量的超声波和微电磁工具的兴起，使得对内置材料（特别是旧钢桥）的表征成为基础设施的经济维护。有可能确定桥梁或任何其他现有钢结构建筑物的残留量，以便通过焊接或使用粗体的简单加固方法来竞争性地升级它们，以备将来使用。