高力ボルト接合部の腐食後耐力

概要

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The aim of this paper is to clarify the effects of corrosion of high-strength bolted joints on the slip strength, the ultimate strength and the fracture mode. Tensile tests of high-strength bolted joints before and after a cyclic corrosion test were executed to quantify the relationships between corrosion conditions and strength reduction. The slip strength of the specimens of bolted joints were scarcely affected by the corrosion. The ultimate strengths of the corroded specimens were observed to decrease with the number of the cycles of corrosion test. Fracture modes of the specimens of few cycles were breaking of the joint, while those of many cycles were breaking of the plate far from the bolt holes. It was shown that this change of the fracture mode can be explained by the observation that the parts which are not directly exposed to the corrosive air such as inner walls of the bolt holes and contact surfaces of the joint are not corroded.
一般社団法人日本建築学会の論文
2004-03-20