원전시설물 고력볼트 pre-load 감소에 의한 철골 구조물 접합부의 안전성 평가

Recently earthquakes around the world , such as the frequent occurrence and impact of abnormal weather safety requirements for nuclear facilities are socially increasing. In particular, the nuclear power plant accident occurred in many of the disruption caused by the release of the bolt and the bolt of the axial force changes in case of nuclear facilities that could cause serious accidents indicates that the most important factor . In this study , when the axial force is reduced bolt applied to nuclear facilities , and does not have to try to figure through finite element analysis of the impact on the structural joint. Therefore , by selecting the source of axial force variation of the four bolts can be designed / constructed in practice, to implement the two-dimensional structure analysis fixed load , the temperature load , the combination of the live load. As a result, changes in the bolt axial force factor of nuclear power plants in the strength of steel structures joints to identify changing patterns in the future management of nuclear facilities, an appropriate structure design and safety design / management process to provided