Seismic evaluation of nuclear structures under structure-soil-structure interaction: Effects of ray-tracing wave propagation and damping calibration

The adjacent distribution of different nuclear structures is a common engineering scenario. Since the Fukushima nuclear accident and with rapid advancements in hardware computational capabilities, the local seismic behavior resulting from the interactions between structures and layered soils is bein...

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Bibliographic Details
Published in:	Soil dynamics and earthquake engineering (1984) Vol. 199; p. 109649
Main Authors:	Hu, Zhewen, Li, Jianbo, Cui, Jianzhi, Lin, Gao
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01.12.2025
Subjects:	Damping calibration Domain reduction method Ray tracing algorithm Structure–soil–structure interaction Time-domain analysis Wave motion Damping calibration Domain reduction method Structure–soil–structure interaction Ray tracing algorithm Wave motion Time-domain analysis
ISSN:	0267-7261
Online Access:	Get full text
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Summary:	The adjacent distribution of different nuclear structures is a common engineering scenario. Since the Fukushima nuclear accident and with rapid advancements in hardware computational capabilities, the local seismic behavior resulting from the interactions between structures and layered soils is being revisited, with potential to become a crucial component of evaluation refinement. The domain reduction method characterizes the relative spatial layouts of structures and surrounding geology, capturing their nonlinear coupling behavior in an exogenous wave field. This study focuses on developing an efficient theoretical model and corresponding algorithmic framework that integrates the partitioned pattern of system matrices, calibration of damping parameters, and batch computation of seismic forces, aided by parallelization and GPU acceleration. The parametric study is conducted for typical scenarios and modular structures, and the following conclusions are drawn. Structure–soil–structure interactions potentially have adverse effects on seismic safety, as exemplified by floor response spectra. Adjustments to the design elevation differences may lead to change in the peak values of vertical floor spectra of nearly 45 %. Softer inter-building inclusions have damping effects, whereas harder inclusions increase the peak values. A high-accuracy ray-tracing wavefields perspective for the seismic evaluation of specific structure adjacency and complex sites is supported via the procedural strategy. •A seismic structure-soil-structure interaction large-scale simulation platform is proposed, improving the efficiency issues.•A partitioned FE framework for SSSI system, supporting regional damping calibration, and iterative update of soil properties.•Efficient parallelized strategies for artificial boundary and seismic forces based on wave propagation in reduced domain.•Discussion on intricate and notable effects of inter-building spatial layouts, strip inclusions, on structural seismic risks.
ISSN:	0267-7261
DOI:	10.1016/j.soildyn.2025.109649