直下型地震による大型鋼構造物モデルの過渡応答時の主要応答における動的挙動

概要

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In this paper, to examine the fracture process in a steel box column of a tall building subjected a strong near-source earthquake, the initial transient behavior of the building model was analyzed. It was found that tensile stresses in many columns exceeded the yield strength of the assumed material in the column, and some of those also exceeded the tensile strength of the column material in the initial transient stage. Through discussing about the rate sensitive stress-strain relation for steel, it suggested that the brittle fracture might occur even at the intermediate strain rates of 0.1〜1 s^<-1> once the tensile stress reached the dynamic yield stress of the material. These results show a strong possibility that a high stress sufficient to initiate a fracture appears in some parts of the tall-building model due to the near-source earthquake.
一般社団法人日本建築学会の論文
2002-03-20