非岩性地基条件下核岛厂房-桩-土非线性动力相互作用特性研究  

Nonlinear Dynamic Analysis of Soil-Pile Interactions of Nuclear Island with Nonlithological Foundation

作　　者：邹德高[1,2] 隋翊 周晨光[1,2] 周扬[1,2] 潘蓉[3] 刘鑫 李江峰 Zou Degao;Sui Yi;Zhou Chenguang;Zhou Yang;Pan Rong;Liu Xin;Li Jiangfeng(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian,Liaoning,116024,China;School of Hydraulic Engineering,Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian,Liaoning,116024,China;Nuclear and Radiation Safety Center,Ministry of Environmental Protection,Beijing,100082,China;China Nuclear Power Design Co.,Ltd.(Shenzhen),Shenzhen,Guangdong,518000,China)

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]大连理工大学建设工程学部水利工程学院,辽宁大连116024 [3]环境保护部核与辐射安全中心,北京100082 [4]深圳中广核工程设计有限公司,广东深圳518000

出　　处：《核动力工程》2020年第2期59-65,共7页Nuclear Power Engineering

基　　金：国家自然科学基金(No.51608095)。

摘　　要：采用核电厂核岛厂房-地基相互作用高性能大规模计算方法,建立了同时考虑钢制安全壳、附属厂房、桩基础以及覆盖层地基的第三代核电厂整体精细化模型,结合了考虑覆盖层非线性效应的粘弹性边界的地震波动输入方法,开展了地基模型尺寸、桩基单元类型、桩-土接触效应等对核岛厂房地震动力响应影响的研究,建议了地基尺寸的合适范围。结果表明:桩基处理方案与覆盖层地基结果相比,厂房水平方向楼层反应谱峰值频率向高频方向发生较大偏移;采用实体单元模拟的桩基能更准确地反应楼层反应谱(FRS)的规律;桩-土接触面对厂房楼层谱影响不大,却对桩基自身的应力分布有着显著改变。By adopting the high performance and large scale computing method of interaction between nuclear island and foundation, this paper establishes a refined numerical model of the Generation III+ NPPs, considering the detailed equipment hatch, auxiliary building, pile foundation and thick overburden foundation, combining the earthquake input method of considering the overburden nonlinear effects and viscoelastic boundary. Subsequently, the influence of the foundation size, element type of pile, pile-soil contact effects on the dynamic response of NPPs were discussed. Then, the suitable range of the foundation are recommended. The results indicate that, comparing with the response of the overburden foundation, the amplitude frequency of horizontal floor response spectrum(FRS) of pile foundation occurred a relatively large deviation to high-frequency direction;using solid element type to simulate the pile can reflect more accurately the regularity of FRS;the pile-soil contact effects have little effect on FRS, however, it significantly alters the pressure distribution of the pile.

关 键 词：深厚覆盖层 精细化模型 等效节点荷载 楼层反应谱(FRS) 桩-土相互作用 核电厂 

分 类 号：TL372.1[核科学技术—核技术及应用] TU435[建筑科学—岩土工程]