ASME11+에서 발표된 ACS SASSI를 이용한 원자력 구조물 SSI 해석 논문입니다.
- 제목: Seismic Soil-Structure Interaction (SSI) Effects for Large-Size Surface and Embedded Nuclear Facility Structures
Dan M. Ghiocel : GP Technologies, Inc. U.S.A
In-Hee Lee: CNG Softek Co., Ltd. Korea
- 논문번호: SM129_1178
- 발표세션: SESSION T5I (Tus-20, 2011 Calla, 1st Fl.)
The paper discusses a variety of aspects related to SSI modeling and analysis. Specifically, the paper discusses the effects of the 3D seismic wave propagation (incoherent motion) vs. the 1D seismic wave propagation (coherent motion, vertically propagating S and P waves) on SSI response.
Theoretical and practical aspects will be presented. The effects of motion incoherency are studied for surface and embedded SSI models, and for rock and soil site conditions.
Incoherent motion field was defined based on the 2007 Abrahamson plane-wave coherency models (Abrahamson, 2007). The incoherent SSI analyses were performed using the stochastic simulation approach implemented in the ACS SASSI code
(2009). It should be noted that the stochastic simulation approach was validated by EPRI studies (Short, Hardy, Merz and Johnson, 2007) and endorsed by US NRC (2008) for application to seismic analysis of the new nuclear power plant structures within the United States.
Several case studies including simplified SSI models of different nuclear island (NI) designs are presented. For the AP1000 NI complex, the effects of structure-soil-structure interaction (SSSI) are also evaluated for both coherent and incoherent seismic motions. Other case studies include a very large-size auxiliary shear wall building and a deeply embedded UHS type building.
The effects of motion incoherency are shown in terms of in-structure response spectra (ISRS), structural forces, and basemat bending moments and forces in embedded walls.