화재에 노출된 단층 돔의 후좌굴 거동에 관한 연구

다국어 초록 (Multilingual Abstract)

The lightweight structures such as domes are particularly vulnerable when it has been subjected to high temperature induced by the fire. It is therefore crucial to predict the possible instability path of structures exposed to the fire in structural design process. In this study, the instabilities of single-layer domes is investigated by using finite element technologies with the consideration of high temperature. The material properties of members under high temperature are considered by using the reduction factors which is provided in Eurocodes 3. Some damage patterns are assumed with use of a structural unit which is symmetric in radial direction. For numerical evaluations, the geometrically nonlinear truss element is implemented and the arch-length control method is employed to trace the post-buckling behaviour of domes. From numerical results, it is found to be that a significant change of post-buckling behaviour is detected in dome structures when structural members are exposed to the fire.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 단층 돔의 형태 자동생성법
• 3. 기하학적 비선형 트러스 요소 정식화
• 4. 화재의 영향을 고려하기 위한 감소계수
• 5. 수치 예제
• 6. 결론
• REFERENCES

참고문헌 (Reference)

1 Twilt, L., "The new eurocode on fire design of steel structures" 2001

2 Crosti, C., "Structural Analysis of Steel Structures under Fire Loading" 49 : 21-28, 2009

3 Chilton, J., "Space Grid Structures" Architectural Press 2000

4 Press, W.H., "Numerical recipes in Fortran 77:the art of scientific computing" Cambridge University Press 1996

5 이상진, "Nonlinear Static Analysis of Cable Roof Structures with Unified Kinematic Description" 대한건축학회 18 (18): 39-47, 2016

6 Yu, Y., "Finite Particle Method for Progressive Failure Simulation of Truss Structures" 137 : 1168-1181, 2011

7 "Eurocode 3 – Design of steel structures, Part 1.2:Struc-tural fire design"

8 Winful, D., "Elevated Temperature Material Behaviour of High Strength Steel" 170 (170): 777-787, 2017

9 Baetu, G., "Behaviour of Steel Structures under Elevated Temperature" 181 (181): 265-272, 2017