|
Title |
Nonlinear Dynamic Analyses of Reactor Containment Building Using Multi-Layer Shell Model and Beam-Truss Model
|
|
Authors |
비덱 투사(Bidhek Thusa) ; 삼다니 아자드(Md Samdani Azad) ; 두이두안 응웬(Duy-Duan Nguyen) ; 이태형(Tae-Hyung Lee) |
|
DOI |
https://doi.org/10.4334/JKCI.2022.34.3.283 |
|
Keywords |
비선형해석; 격납건물; 보-트러스 모델; 다층쉘모델; 층응답스펙트럼 nonlinear analysis; reactor containment building; beam-truss element model; multi-layer shell model; floor response spectrum |
|
Abstract |
The objective of this study is to investigate linear and nonlinear analysis schemes for evaluating seismic performance of a reactor containment building (RCB) in the advanced power reactor 1400 nuclear power plant (NPP). Two structural modeling schemes, the multi-layer shell model (MLSM) and beam-truss model (BTM), are developed to simulate the seismic behaviors of RCB. A full three-dimensional finite element model is additionally constructed to verify the numerical modeling schemes used. A set of input ground motions with response spectra compatible with US NRC 1.60 design spectrum is generated to perform linear and nonlinear time-history analyses. The floor response spectra and floor displacements are obtained at different elevations of the structure since those are critical outputs for evaluating seismic behaviors of RCB and secondary components. The results show that the difference in seismic responses between linear and nonlinear analyses becomes larger as earthquake intensity increases. The linear analysis underestimates floor displacement while it overestimates floor acceleration. BTM and MLSM are good options for seismic performance evaluation of NPP structures by nonlinear time-history analyses.
|