303 衝撃力を受ける締結されたボルト接合部の挙動

概要

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A release of connective force or failure of bolt connections under the shock loading sometimes causes severe accidents in the fabricated structures. Behavior of a bolt connection under a shock loading is studied experimentally and numerically in this report. A steel block connected on a table by eight bolts is used for this study. A shock loading is given as an upward impact on the bottom of table by an impact head. Strain time history of connecting bolts is measured by the strain gages set within the bolts. FEM analysis is carried out to reproduce the behavior of a bolt connection. Pre-tension is introduced to show the initial torque given to the bolt. Then, shock loading is introduced by the physical collision between table and impact head. The calculated strain is compared with the measured value to show the validity to current numerical model.
2003-08-05