Bi‐directional ground motions: Stochastic simulation and frequency‐dependent modal combination rule

2021 ◽  
Author(s):  
Subhadip Naskar ◽  
Sandip Das
Keyword(s):  
Stochastic Simulation ◽  
Ground Motions ◽  
Combination Rule ◽  
Frequency Dependent

scholarly journals Near-surface frequency-dependent nonlinear damping ratio observation of ground motions using SMART1

2021 ◽  
Vol 147 ◽  
pp. 106798
Author(s):  
Chun-Hsiang Kuo ◽  
Jyun-Yan Huang ◽  
Che-Min Lin ◽  
Chun-Te Chen ◽  
Kuo-Liang Wen
Keyword(s):  
Ground Motions ◽  
Damping Ratio ◽  
Nonlinear Damping ◽  
Frequency Dependent ◽  
Near Surface

scholarly journals Generation of Uniform Hazard Spectrum Based on the Stochastic Method of Simulating Ground Motion and Its Use in Nuclear Power Plants

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Xueming Zhang ◽  
Weiming Yan ◽  
Haoxiang He ◽  
Yunlun Sun ◽  
Shicai Chen
Keyword(s):  
Stochastic Simulation ◽  
Nuclear Power ◽  
Power Plants ◽  
Hazard Analysis ◽  
Ground Motions ◽  
Site Effect ◽  
Element Model ◽  
Simulation Method ◽  
Stochastic Method ◽  
Uniform Hazard Spectrum

To obtain an accurate uniform hazard spectrum (UHS), this paper proposes combining a stochastic simulation with probabilistic seismic hazard analysis. The stochastic method fully accounts for the effect of the source mechanism, path, and site effect. Historical ground motions in the site specific to the nuclear power plant (NPP) are simulated, and a UHS with an equal exceeding probability is proposed. To compare the seismic performance of the NPP under different ground motions generated by the existing site spectrum (SL-2), the UHS generated by the safety evaluation report, and the US RG1.60 spectrum, respectively, a three-dimensional finite element model is established, and dynamic analysis is performed. Results show that the structural responses to different spectra varied; the UHS response was slightly larger than that of RG1.60. This finding is relatively more reasonable than prior research results. The UHS generated using the stochastic simulation method can provide a reference for the seismic design of NPPs.

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