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趙永全， 胡群芳， 羅奇峰
（同濟大學上海防災(zāi)救災(zāi)研究所，上海 200092）[摘要] 日本的東日本大地震（日本3.11地震）對福島核電站的破壞引起國內(nèi)外高度重視，取水隧道作為核電站冷卻循環(huán)供水設(shè)施，其抗震可靠性十分重要。為了研究某核電廠的取水隧道取水頭部在橫向地震動作用下的結(jié)構(gòu)安全性，采用通用有限元程序ABAQUS建立三維土層-結(jié)構(gòu)模型，對取水隧道進行了地震響應(yīng)數(shù)值模擬計算。通過計算取水頭部特殊段襯砌（閉口環(huán)、開口環(huán)）和立管結(jié)構(gòu)在地震作用下的位移和內(nèi)力，驗算了取水隧道結(jié)構(gòu)設(shè)計在7度0.15g地震加速度作用下的結(jié)構(gòu)抗震可靠性，通過分析說明結(jié)構(gòu)設(shè)計滿足抗震要求。研究可為核電廠取水隧道取水頭部結(jié)構(gòu)地震響應(yīng)和結(jié)構(gòu)設(shè)計提供參考。
[關(guān)鍵詞] 取水隧道；特殊段；橫向地震反應(yīng)；土-結(jié)構(gòu)模型
中圖分類號：TV334 文獻標識碼：A 文章編號：1002-848X(2012) Sl-0246-05Numerical analysis on transverse seismic response of a large-diameter water intake tunnel for nuclear plant
Zhao Yongquan, Hu Qunfang, Luo Qifeng
(Institute of Disaster Prevention and Relief, Tongji University, Shanghai 200092, China)Abstract: The damage of Fukushima nuclear power plant on East Japan earthquake caused international attention. Seismic reliability analysis of water intake tunnel is very important, which is a necessary supply facility to provide cooling water for nuclear power plant. To study the structural safety of the special section under the transverse earthquake affection, a three-dimensional soil-structure model established by ABAQUS software was used to calculate the seisnuc response for the nuclear power plant water intake tunnel. The deformation and intemal force of special section of the tunnel( closed segment and open segment) and vertical standpipe under the earthquake action were analyzed, and the reliablity of water intake tunnel was verified under the action of the earthquake peak acceleration (0.15g). The result of FEM calculation shows that earthquake resistant behavior of the special structure is in good condition. The research can provide a useful method for seismic response analysis of water intake tunnel head special structure.
Keywords: water intake tunnel; special section; transverse seismic response; soil-structure model
