Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Reliability Analysis of Three-Dimensional Temporary Shoring Structures Considering Bracing Member and Member Connection Condition

가새재 및 부재 연결 조건을 고려한 3차원 가설 동바리 구조물의 신뢰성 해석

  • 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) ;
  • Kim, Seung-Min (Hankyung S&C Corporate Research Institute)
  • 류선호 (한경대학교 토목안전환경공학과) ;
  • 옥승용 (한경대학교 토목안전환경공학과) ;
  • 김승민 ((주)한경S&C 기업부설연구소)
  • Received : 2018.12.14
  • Accepted : 2019.01.03
  • Published : 2019.02.28
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Abstract

This study performs reliability analysis of three-dimensional temporary shoring structures with three different models. The first model represents a field model which does not have diagonal bracing members. The installation of bracing members is often neglected in the field for convenience. The second model corresponds to a design model which has the bracing members with the hinge connection of horizontal and bracing members at joints. The third model is similar to the second model but the hinge connection is replaced with partial rotational stiffness. The reliability analysis results revealed that the vertical members of the three models are safe enough in terms of axial force, but the vertical and horizontal members exhibit a big difference among the three models in terms of combination stress of axial force and bi-axial bending moments. The field model showed significant increase in failure probability for the horizontal member, and thus the results demonstrate that the bracing member should be installed necessarily for the safety of the temporary shoring structures.

Keywords

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Fig. 1. 3D models of temporary shoring structures.

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Fig. 2. Conceptual drawing of failure probability and its 1st -order approximation to limit state function.

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Fig. 3. FORM results of M1.

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Fig. 4. MCS results of M1.

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Fig. 5. FORM resultas of M2.

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Fig. 6. MCS results of M2.

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Fig. 7. FORM results of M3.

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Fig. 8. MCS results of M3.

Table 1. Materials and sectional properties of members for temporary shoring structures

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Table 2. Probability distributions of random variables

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Table 3. Reliability analysis results of compressive vertical members

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Table 4. Reliability analysis results of horizontal members for combination of axial force and bi-axial bending moments

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