Strength Assessment of T-type Lifting Lugs Considering Deformation of Blocks

블록의 변형을 고려한 T형 리프팅 러그의 강도 평가

Lee, Joo-Sung;Kim, Min-Sul

  • Received : 2015.07.24
  • Accepted : 2015.08.19
  • Published : 2015.08.31


Lifting lugs are frequently used in shipyards to transport and turn over the blocks of ships and offshore structures. With the development of shipbuilding technology, blocks have increased in size, and block management technology has assumed a more important role in shipbuilding to enhance the productivity. For the sake of economics, as well as the safe design of a lug structure, a more rational design procedure based on a rigorous structural analysis is needed. This study investigated the strength characteristics of T-type lugs, considering the influence of blocks on which lugs are attached, by varying the in-plane and out-of-plane load direction. In this paper, the ultimate strength is also addressed for cases that include or do not include blocks in the strength analysis. In the present results, when there was a load acting in the normal direction to the block surface, the strength characteristics became poor, and the ultimate strength decreased. This paper ends by describing the need for further study to develop a more rational design for a lug structure.


T type lug;Lifting;Non-linear structural analysis;Ultimate strength;Turn over;Block


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