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http://dx.doi.org/10.14346/JKOSOS.2019.34.5.87

Reliability Analysis of Temporary Structures Considering Uncertainty in Rotational Stiffness at Member Joints  

Ryu, Seon-Ho (Department of Civil, Safety and Environmental Engineering, Hankyong National University)
Ok, Seung-Yong (Department of Civil, Safety and Environmental Engineering & Construction Engineering Research Institute, Hankyong National University)
Publication Information
Journal of the Korean Society of Safety / v.34, no.5, 2019 , pp. 87-94 More about this Journal
Abstract
This study deals with the reliability analysis approach of the temporary structure that can consider the uncertainty in rotational stiffness at the joints of the members, for which the semi-rigid connections are modelled as rotational spring and its coefficient is treated as a random variable following uniform distribution. In addition, this study introduces a computational procedure of the effective length coefficient for more accurate buckling load according to connection conditions of the supporting members attached to the joint. From the results of this study, it can be seen that the failure probability of the joint-hinge model (Case 1) presented in the design standard is higher than that of the practical model (Case 5) considering the rotational stiffness at the joints. This implies that the design standard leads to a conservative design of the temporary structure. The results also confirmed that the failure probability of the vertical member, i.e., the most critical member, can be further reduced when the base connection is provided with a fixed end. The comparative results between FORM, SORM and MCS further demonstrated that FORM can have a high level of numerical efficiency while ensuring the accuracy of the solution, compared with SORM and MCS. Based on these results, the proposed approach can be used as an accurate and efficient reliability analysis method of the three dimensional temporary structure.
Keywords
temporary structures; reliability analysis; rotational stiffness; uncertainty; failure probability;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 Occupational Safety and Health Research Institute, Industrial Disaster Statistics News Release, KOSHA, 2019, https://www.kosha.or.kr/.
2 Construction Safety Management Information System, Accident Case DB Search, https://www.cosmis.or.kr.
3 S. H. Ryu, S.-Y. Ok and S. M. Kim, "Reliability Analysis of Three-Dimensional Temporary Shoring Structures Considering Bracing Member and Member Connection Condition", J. Korean Soc. Saf., Vol. 34, No. 1, pp. 53-61, 2019.   DOI
4 MOLIT, Korean Design Standard, KDS 21 50 00 : 2018, http://www.kcsc.re.kr.
5 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
6 Y. Seong, A Failure Probability of Temporary Structure, Master Thesis, Myongji University, 2016.
7 S. M. Kim, "Three-Dimensional Reliability Analysis of Temporary Shoring Structures", Master Thesis, Hankyong National University, 2018.
8 S. H. Ryu and S.-Y. Ok, "Influence Investigation of Rotational Stiffness at Member Joint on Reliability Analysis of 3-Dimensional Temporary Structure", Spring Conference of the Korean Society of Safety, 2019.
9 MOLIT, Korean Design Standard, KDS 14 31 15 : 2017, http://www.kcsc.re.kr.
10 Midas User Support System, MQCS, Analysis Algorithm, http://kor.midasuser.com/civil/.
11 J. C. McCormac, "Structural Analysis: Using Classical and Matrix Methods", John Wiley & Sons, 2006.
12 R. P. Brent, "Algorithms for Minimization without Derivatives", Englewood Cliffs, NJ, Prentice-Hall, 1973.
13 A. Der Kiureghian "First- and Second-order Reliability Methods", Engineering Design Reliability Handbook, Edited by E. Nikolaidis, D. M. Ghiocel & S. Singhal, CRC Press, Boca Raton, FL, Chapter 14, 2005.
14 N. Metropolis and S. Ulam, "The Monte Carlo Method", Journal of the American Statistical Association, Vol. 44, No. 247, pp. 335-341, 1949.   DOI