Browse > Article
http://dx.doi.org/10.14346/JKOSOS.2022.37.4.36

Analysis of the Correlation between the Thickness of Support Pin of Pipe Support and the Compressive Load  

Choi, Myeong Ki (Department of Safety Engineering, Pukyong National University)
Park, Jongkeun (Department of Disaster Fire and Construction Safety, Daejeon Health Institute of Technology)
Publication Information
Journal of the Korean Society of Safety / v.37, no.4, 2022 , pp. 36-43 More about this Journal
Abstract
Generally, in construction sites, the pipe support installation workers often use support pins of 9~10 mm which are much smaller than the safety standard sizes for work convenience. Although the safety certification standard thickness of the support pins is 11 mm, and the supervisors are often indifferent to this. Hence, products with far lower performance than the pipe support safety certification value of 40,000 N, which is applied in the supporting post-structural review, are used. Accordingly, this acts as a factor causing collapse accidents in the process of pouring concrete at the construction site. Therefore, this study performed compression experiments on new and reused pipe supports to determine how the thickness of the support pins affects the structural compression performance of the pipe support by considering the thickness of the support pins as a critical variable among various factors affecting the pipe support performance. In the course of the study, the compression test of the pipe support (V2, V4) for the new products showed that only 14 (58.3%) of the total 24 samples satisfied the safety certification standard value of 40,000 N, which indicates that more thorough quality control is required in the manufacturing process. Additionally, comparing the thickness of the support pins and their fracture shape shows that the pipes with support length of 4.0 m or longer are much more affected by the buckling of the entire length than the thickness of the support pins. Of the several factors affecting the performance of reused pipe supports, it was found that, similar to the new products, the use of support pins, with thickness of 12 mm rather than 11 mm, can satisfy the safety certification value more appropriately. Therefore, regardless of the state of usage, it could be concluded that it is necessary to use 12 mm products, whose thickness is larger than that of the safety certification standard value of 11 mm, to improve the performance of the pipe supports.
Keywords
the pipe support; he pipe support pin; compressive load; compressive strength;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 M. Choi and Jo. Park, "A Experimental Study on Performance Improvement Factors of Used V4 Steel Pipe Support", J. Korean Soc. Saf., Vol. 35, No. 3, pp. 43-48, 2020.
2 J. Park and M. Choi "A Study on Quality Management Improvement of Used Pipe Support(V2)", J. Korean Soc. Saf., Vol. 34, No. 3, pp. 36-41, 2019.
3 S. Paik and I. Song, "A Study on the Buckling Characteristics of Pipe Support(V6)", J. Korean Soc. Saf., Vol. 26, No. 3, pp. 59-62, 2011.
4 J. H. Hwang, S. T. Shin, S. M. Yun and K. H. Kim, "A Study for Evaluation of Performance and Influence Factors for Steel Pipe Supports(I)", Journal of the Korea Concrete Institute, Vol. 16, No. 2, pp. 139-146, 2004.   DOI
5 M. Choi and J. Park, "A Experimental Study on Performance Improvement Factors of Used V4 Steel Pipe Support", J. Korean Soc. Saf., Vol. 35, No. 3, pp. 43-48, 2020.
6 B. H. Oh and B. J. Choi, "A Study on Improvement of Safety & Quality Management Standard Based on Compression Tests of Steel Pipe Supports", J. Korean Soc. Saf., Vol. 33, No. 2, pp. 94-103, 2018.