몬테카를로 기법을 이용한 플로팅구조물의 반강접 접합부 신뢰성해석

Abstract

In general, the semi-rigid connections are preferred for low rise structure. If semi-rigid connections are used for floating structure, the number of rigid connections can be reduced and more economical construction will be possible.

In case of semi-rigid connection, it takes place mostly through specific experiment in order to assume actual structure’s moment-rotation. Thus, it is necessary to assume the structure’s behavior by applying the uncertainty of the variables related to the moment-rotation relationship to the reliability theory based on the probability theory. Accordingly, this study executed probability analysis that applied the Monte carlo method when it comes to the semi-rigid connection probability variable that is applied to the floating structure’s beam-column connection. Moreover, results of analysis carried out based on the existing deterministic method are compared and analyzed. Moreover, reliability is evaluated with the reliability index and probability of failure, indices for structure’s safety through the reliability analysis that applied the serviceability limit state.

This study selected connection’s ultimate moment capacity() and initial connection’s stiffness() that significantly affect the moment-rotation angle’s rotational stiffness as the probability parameter, and it carried out the probability analysis of the semi-rigid connection using Monte carlo method. Serviceability limit state was applied to calculate the reliability index and probability of failure in order to conduct reliability evaluation.