応力三輪度と局部延性を用いた亀裂発生評価の提案

概要

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As a result of extensive researches, stress triaxiality ratio and local ductility were found deeply associated with crack initiation in the welded beam-column connections. When considering whether current definition of the relationship between triaxiality and local ductility can be used for judging, evaluating and predicting crack initiation behavior of the welded beam-column connections, it unfortunately turns out a difficulty to satisfy such a purpose. In this paper, emphasis at the beginning is to establish a new relationship between stress triaxiality and local ductility using the strain incremental theory. FEM analysis then is conducted to determine the critical value of crack initiation with the help of data collected from the full-scaled connection subassembly tests. For a better understanding of the new definition, detailed information on how to judge, evaluate and predict the likelihood of crack initiation mode as well as connection load-bearing ability is provided.
社団法人日本建築学会の論文
2002-11-30