Browse > Article
http://dx.doi.org/10.14346/JKOSOS.2018.33.4.46

Flexural Strength and Rotational Stiffness Estimation of Joint between Vertical and Horizontal Members in System Support  

Won, Jeong-Hun (Department of Safety Engineering, Chungbuk National University)
Lee, Hyung Do (Department of Safety Engineering, Chungbuk National University)
Choi, Myeong-Ki (Testing & Research Center, Korea Temporary Equipment Association)
Park, Man Cheol (Testing & Research Center, Korea Temporary Equipment Association)
Publication Information
Journal of the Korean Society of Safety / v.33, no.4, 2018 , pp. 46-53 More about this Journal
Abstract
This study examined the maximum resistant moment and nonlinear rotational stiffness of wedge joint between the vertical and horizontal members of system supports. To examine the maximum resistant moment and propose the nonlinear rotation stiffness of wedge joint, 6 specimens were tested and additional 3 specimens, where the horizontal member was welded to the vertical member, were tested to compare the moment capacity of wedge joints. The average maximum moment in the tested wedge joint was 1.183 kNm which represented about 70 % of the maximum moment developed in the welded specimens. And, as simulating nonlinear rotational stiffness of the wedge joint, a tri-linear model was suggested. The rotational stiffness was estimated as 23.095 kNm/rad in first stage, 7.945 kNm/rad in second stage, and 3.073 kNm/rad in third stage. For the failure mode, the specimen with the wedge joint showed the failure of joint between vertical and horizontal members. However, the specimen with welded joint represented the yielding of horizontal members.
Keywords
maximum resistant moment; rotational stiffness; wedge joint; system support; tri-linear model;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 G. Y. Kim, J. H. Won and S. H. Kim, "Structural Behavior Analysis of System Supports according to Boundary Condition of Joints between Vertical and Horizontal Members", J. Korean Soc. Saf., Vol. 32, No. 3, pp.60-65, 2017.   DOI
2 MOLIT(Ministry of Land, Infrastructure and Transport), Construction Technology Promotion Act, 2018.
3 D. H. Chung, G. Y. Kim and J. H. Won, "Effects of Minimum Horizontal Load on Structural Safety of System Supports", J. Korean Soc. Saf., Vol. 30, No. 5, pp. 37-43, 2015.   DOI
4 S. L. Chan, H. Y. Huang and L. X. Fang, "Advanced Analysis of Imperfect Portal Frames with Semirigid Base Connections", Journal of the Engineering Mechanics, Vol. 131, pp.633-640, 2005.   DOI
5 J. Reynolds, H. Zhang and K. J. R. Rasmussen, "Investigation of U-head Rotational Stiffness in Formwork Supporting Scaffold System", Engineering Structures, Vol. 136, pp.1-11, 2017.   DOI
6 L. B. Weesner and H. L. Jones, "Experimental and Analytical Capacity of Frame Scaffolding", Engineering Structures, Vol. 23, pp.592-599, 2001.   DOI
7 U. Prabhakaran, R. G. Beale and M. H. R. Godley, "Analysis of Scaffolds with Connections Containing Looseness", Computer and Structures, Vol. 89, pp.1994-1955, 2011.
8 T. Chandrangsu and K. J. R. Rasmussen, "Investigation of Geometric Imperfections and Joint Stiffness of Support Scaffold Systems", Journal of Constructional Steel Research, Vol. 67, pp.576-584, 2011.   DOI
9 EN 12811-3: 2002 Temporary Works Equipment, Part 3: Load testing.
10 SEMA, "Code of Practice for Static Racking", The Storage Equipment Manufacturers Association, UK Trade Association, 1985.
11 J. L. Peng, C. W. Wu, S. L. Chan and C. H. Huang, "Experimental and Numerical Studies of Practical System Scaffolds", Journal of Constructional Steel Research, Vol. 91, pp.64-75, 2013.   DOI
12 W. Prabhakaran and M. H. R. Godley, "Three-dimensional Second Order Analysis of Scaffolds with Semi-rigid Conne Ctions", Tubular Structures-International Symposium, Vol. 11, pp. 203, 2006.
13 T. Chandrangsu and K. J. R. Rasmussen, "Structural Modelling of Support Scaffold Systems", Journal of Constructional Steel Research, Vol. 67, No. 5, pp. 866-875, 2011.   DOI