[논문]타워크레인 텔레스코핑 작업의 풍속 및 하중에 대한 구조 안전성 연구

정성룡; 이도근; 백신원; 신상연

doi:10.14346/jkosos.2021.36.1.9

타워크레인 텔레스코핑 작업의 풍속 및 하중에 대한 구조 안전성 연구
A Study on the Structural Safety of Tower Crane Telescoping Work according to Wind Speed and Load 원문보기

한국안전학회지 = Journal of the Korean Society of Safety, v.36 no.1, 2021년, pp.9 - 17

정성룡 (한경대학교 토목안전환경공학과) , 이도근 (한경대학교 토목안전환경공학과) , 백신원 (한경대학교 사회안전시스템공학부) , 신상연 (한경대학교 토목안전환경공학과)

Abstract ▼ AI-Helper

This study analyses the load imbalance of the tower crane used in telescoping work for structural safety, owing to the difference in wind speed and balance weight position. This is because wind speed and position of the balance weight have a significant impact on the structural stresses of a tower crane during telescoping work. Therefore, structural analysis was performed on the 290HC model, which is often used at construction sites and has only one cylinder installed. Moreover, two models were classified to determine the load acting on the connecting part of the telescopic cage to slewing platform and the cylinder. Five types of balance weight positions were applied at regular intervals from jibs; moreover, four types of wind load criteria were differently applied. Hence, the telescopic cage columns were destroyed at all balance weight positions at a wind speed of 30 m/s and only at certain locations at a wind speed of 20 m/s. Furthermore, failures occurred for cylinders, torsional, and bending at wind speeds of 30 m/s and 20 m/s, load imbalances above the allowable thresholds considering the safety factor. In addition, the load imbalance in the telescoping work also varied depending on the position of the balance weights. The results of these studies have validated that the current standards of adjusting the appropriate position of the balance weights on the jib are completely valid, with the telescoping work to be executed only at wind speeds of less than equal to 10 m/s.

주제어

표/그림 (21)

그림 Fig. 1. Main member of tower crane.
그림 Fig. 2. Applied load of tower crane.
표 Table 1. Member properties of tower crane
표 Table 2. Material(SM490YA) properties of tower crane
그림 Fig. 3. Conceptual modeling of Modeling-1.
그림 Fig. 4. Conceptual modeling of Modeling-2.
표 Table 3. Member properties of tower crane
표 Table 3. Wind load of tower crane in change of wind speed
표 Table 4. Load combination of tower crane modeling
표 Table 5. Properties of Telescopic cage column
표 Table 6. Allowable load of connection part in Telescopic cage
표 Table 7. Reaction load of P1~P4
표 Table 8. Combined allowable threshold of P1~P4
표 Table 9. Properties of connection pin
표 Table 10. Allowable load of connection pin
그림 Fig. 5. Reaction load and moment of P5.
표 Table 11. Properties of cylinder
표 Table 12. Allowable load and moment of cylinder
표 Table 13. Change ratio of torsion moment in balance weight parameter
표 Table 14. Change ratio of torsion moment in wind speed parameter
표 Table 15. Change ratio of bending(X) moment in wind speed parameter

참고문헌 (16)

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상세보기
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상세보기
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원문보기 상세보기
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상세보기
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원문보기 상세보기
Ministry of Land, Infrastucture and Transport, "Structure, Specification and Performance of Tower Crane", 2015.
Ministry of Employment and Labor, "Rules of Industrial Safety and Health Standards", 2019.

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