- 摘 要
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（中國核電工程有限公司北京工業(yè)研究設(shè)計院， 北京 100840）
［摘要］以某三代核電站核島廠房整體筏基為分析對象，根據(jù)整體筏基的結(jié)構(gòu)構(gòu)造特點，采用軟件ANSYS建立了適用的有限元模型，根據(jù)規(guī)范確定了設(shè)計采用的荷載及荷載組合。通過有限元分析，得到整體筏基的內(nèi)力并據(jù)此進(jìn)行配筋設(shè)計，并對整體筏基進(jìn)行了抗滑移和抗傾覆的穩(wěn)定性驗算?；谠摵穗娬菊w筏基構(gòu)造的復(fù)雜性，采用了多種單元類型及連接方式建立復(fù)雜有限元模型；采用了瞬態(tài)溫度場分析方法確定設(shè)計基準(zhǔn)事故溫度下整體筏基受力的最不利狀態(tài)；采用了時程分析方法計算上部結(jié)構(gòu)作用在整體筏基上的地震作用，降低了傳統(tǒng)的擬靜力方法的保守性，在保證了整體筏基設(shè)計安全的前提下，提高了整體筏基設(shè)計的經(jīng)濟性。
［關(guān)鍵詞］整體筏基； 瞬態(tài)溫度； 時程分析； 三代核電站
中圖分類號：TU398文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2018)16-0107-04
Design of the integral raft foundation of a third-generation nuclear power plant
Sun Xiaoying, Zhang Chunlong, Meng Jian, Liu Yulin
(Beijing Institute of Industrial Engineering, China Nuclear Power Engineering Co., Ltd., Beijing 100840, China)
Abstract:The design of the integral raft foundation was studied and described with a third-generation nuclear power plant as analysis object. In the analysis, the finite element model of the whole nuclear island buildings including integral raft foundation was built using ANSYS. The loads and load combinations were selected according to relative design codes. Based on the internal forces obtained from structure analysis, the reinforcement calculation was performed. Moreover, the anti-sliding stability and anti-overturning stability of the raft foundation were evaluated. Based on structural complexity of the raft foundation of the nuclear power plant, various element types and connection types were selected to model the structure considering the complex configuration of the integral raft foundation; the thermal distribution of the raft foundation under accidental case was analyzed utilizing the approach of transient thermal field to determine the most unfavorable internal forces. Time history analysis method was used to compute the seismic lateral force and the maximum lateral force. The application of these technologies reduces the conservatism of traditional quasi-static method and improves the economy of the integral raft foundation design under the premise of safety.
Keywords:integral raft foundation; transient temperature; time history analysis; third-generation nuclear power plant
作者簡介：孫曉穎，碩士，高級工程師，一級注冊結(jié)構(gòu)工程師，Email: sunxy@cnpe.cc。
