非岩性地基钍基熔盐堆厂房楼层反应谱分析与优化

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关键词钍基熔盐堆，人工地震波混合模拟，地震波动输入，土-结构相互作用，楼层谱优化中图分类号：TU31，TU352，TL371 文献标志码：A DOI： 10.15935/j.cnki.jggcs.202504.0010

AbstractA hybrid simulation method for artificial seismic waves was developed to match target response spectra while enveloping specified power spectral densities. The equivalent stress magnitudes and orientations on five artificial boundary surfaces were quantified under both horizontal and vertical seismic excitations.Soil response analyses were conducted using EERA software to compute fre-field seismic motions at varying depths.A finite element model integrating the thorium-based molten salt reactor（TMSR）building with underlying soil strata was established，and seismic response analyses incorporating soil-structure interaction （SSI）effects were performed.Additionally，a vertical floor response spectrum （VFRS）optimization methodology was proposed.The results demonstrate that：The hybrid simulation method achieves high accuracy in matching target design response spectra and efectively envelops target power spectral densities; Due to distinct local vibrational characteristics of floor slabs，the vertical response spectrum may exhibit amplification peaks near local natural frequencies—unlike horizontal spectra-which adversely impacts seismic assessments of nuclear equipment；Adjusting the structural layout to modify local vibrational characteristics improves the vertical response spectrum of the targeted floor slab sections.

Keywordsthorium molten salt reactor，mixed simulation of artificial seismic waves，earthquake wave input， soil-structure interaction，floor spectrum optimization

0 引言

钍基熔盐堆（TMSR作为我国第四代核能技术的战略部署，具有钰资源高效利用、核废料少、本质安全及高温输出等显著优势，特别契合我国钰资源丰富特点。（剩余16667字）