کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
296049 511704 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Seismic soil–structure interaction analysis of a nuclear power plant building founded on soil and in degraded concrete stiffness condition
ترجمه فارسی عنوان
تجزیه و تحلیل اثر متقابل لرزه ساختار ـ خاك ساختمان نیروگاه هسته ای بر پایه خاک و شرایط سفتی بتن تخریب شده
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی


• Three dimensional finite element modeling of a Nuclear Power Plant (NPP) building founded on soil is described.
• A simplified technique to consider degraded stiffness of concrete members in seismic analysis of NPP buildings is presented.
• The effect of subsurface profiles on the seismic response of a NPP building is investigated.

This study describes three-dimensional (3-D) finite element (FE) modeling and seismic Soil-Structure Interaction (SSI) analysis of a Nuclear Power Plant (NPP) Diesel Generator Building (DGB) that is founded on soil in degraded concrete stiffness condition. A new technique is presented that uses two horizontal and vertical FE models to consider the concrete stiffness reduction of NPP buildings subjected to orthogonal ground motion excitations, in which appropriate stiffness reduction factors, based on the input motion orientation, are applied. Seismic SSI analysis is performed for each model separately, and dynamic responses are calculated in the three global directions. The results of the analysis for the two FE models are then combined, using the square-root-of-the-sum-of-squares (SRSS) combination rule. A sensitivity analysis is also performed to investigate the subsurface profile effect on the In-Structure (acceleration) Response Spectra (ISRS) of the building when subjected to site-specific Foundation Input Response Spectra (FIRS) that exhibit high spectral amplifications in the high-frequency range. The sensitivity analysis considers three strain-compatible subsurface profiles that represent Lower-Bound (LB), Best-Estimate (BE), and Upper-Bound (UB) conditions at the DGB site. The sensitivity analysis results indicate that the seismic response of the DGB founded on soil highly depends on the subsurface profile; i.e., each of the LB, BE, and UB subsurface profiles can maximize building seismic response when subjected to FIRS that exhibit high spectral amplifications in the high-frequency range. Therefore, it is important to consider SSI parameter variability in the seismic design or evaluation of NPP buildings that bear on soil.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Engineering and Design - Volume 297, February 2016, Pages 320–326
نویسندگان
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