래티스 돔 구조물의 탄소성 거동 특성에 관한 연구

초록

A single layer latticed dome is one of the most efficient structures because of its low specific gravity. For easily analyzing of a sinlge layer latticed dome, joint system is assumed to be pin or rigid joint. However, its joint uses ball whose system has intermediate properties of pin and rigid joint. Therefore this study has a grasp of bending rigidity, stress and mechinical properties through experimental and analyzing method of the bolt inserted ball joint. To analyze the stress of bolt and sleeve, this study uses through 3D elastic contact and cubic element, and then the ball and the bolt are perfectly connected for easily analyzing. Compared experimental results of F.E.M, each specimen has an error of less than 12 percent. In the results of stress distribution through F.E.M, stress occurs from bottom of bolt to top of sleeve, and most of tension appears on the bolt, also compression occurs from upper parts of the bolt to the sleeve. The assumption of bending stiffness in ball joint is well known that bolt resist only tension and upper sleeve resist compression. The results of experiment and analysis have 7~56 % error, assuming that upper part of bolt occurs of partial compression. In the result of modified assumption have 4~20% error.