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（大連大學(xué)土木工程技術(shù)研究與開發(fā)中心， 大連 116622）
［摘要］壓水堆（PWR）核電廠取水構(gòu)筑物兩側(cè)翼墻是核電廠海域工程的重要組成部分，屬于抗震類別Ⅰ類，其受復(fù)雜非均質(zhì)地基的影響不容忽視。以某壓水堆核電廠取水構(gòu)筑物翼墻為研究對象，推導(dǎo)了基于極大初始時(shí)間步的粘彈性人工邊界靜動力聯(lián)合分析模型，用以考慮結(jié)構(gòu)-地基相互作用效應(yīng)（即SSI效應(yīng)）。利用有限元分析軟件ANSYS建立了翼墻-地基三維靜動力計(jì)算模型，模擬分析了非均質(zhì)地基的幾何形態(tài)復(fù)雜性。通過靜動力聯(lián)合分析結(jié)果與靜力分析結(jié)果的對比，驗(yàn)證了所開發(fā)靜動力模型的合理適用性。對翼墻開展了靜動力聯(lián)合分析，探討翼墻的主應(yīng)力分布規(guī)律和其關(guān)鍵部位在重力、靜水壓力、動水壓力及地震等荷載效應(yīng)組合下的加速度變化情況和結(jié)構(gòu)構(gòu)件內(nèi)力分布規(guī)律，綜合評價(jià)翼墻基礎(chǔ)底面接地率、抗滑和抗傾覆穩(wěn)定性等。計(jì)算方法和分析成果可為壓水堆核電廠翼墻及類似結(jié)構(gòu)的抗震安全評價(jià)與優(yōu)化設(shè)計(jì)提供參考。
［關(guān)鍵詞］核電廠翼墻； 非均質(zhì)地基； 極大初始時(shí)間步法； 粘彈性邊界； 結(jié)構(gòu)-地基相互作用
中圖分類號：TU311-3文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2018)16-0072-06
Seismic safety analysis of two-side wing wall of nuclear power plant based on maximum initial time-step method
Yin Xunqiang, Wang Guixuan, Sun Huayue
(Research and Development Center of the Civil Engineering Technology, Dalian University, Dalian 116622, China)
Abstract:The two-side wing wall of a pressurized water reactor (PWR) nuclear power plant is an important part for marine engineering of nuclear power plant. It belongs to the anti-seismic category I, and the influence of its complex heterogeneous foundation cannot be ignored. According to a practical situation of a PWR nuclear power plant, the viscoelastic artificial boundary model combined static and dynamic analysis based on the maximum initial time-step was derived to consider the soil-structure interaction effect (SSI effect). The three-dimensional static and dynamic model of wing wall foundation was established, and the geometrical complexity of non-homogeneous foundation was stimulated by the finite element analysis software ANSYS. The developed static and dynamic model was proved to be reasonable and applicable by the comparison between static and dynamic analysis results and static analysis results. The combined static and dynamic analysis of wing wall was carried out to investigate the distribution of the principal stress of the wing wall and the acceleration change and internal force distribution rules of structure under some conditions were evaluated comprehensively, for instance, under the condition of gravity, hydrostatic pressure, dynamic water pressure and seismic load effect. The grounding rate, anti-sliding, and anti-overturning stability of the wing wall foundation were evaluated. The calculation method and analysis results can provide reference for the seismic safety evaluation and optimization design of wing wall and similar structures in pressurized water reactor nuclear power plant.
Keywords:nuclear power plant wing wall; heterogeneous foundation; maximum initial time-step method; viscoelastic boundary; structure-foundation interaction
*國家自然科學(xué)基金面上項(xiàng)目(51678100)，遼寧省博士啟動基金(201601309)。
通訊作者：王桂萱，博士，教授，博士研究生導(dǎo)師，Email：lc-tm2008@163.com。
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