长周期地震动作用下某EPR核电站安全壳的隔震性能分析
The research on isolation performance of containment vessel of EPR nuclear power plant under long-period ground motions
林树潮1
作者信息
- 1. 天津大学建筑工程学院土木工程博士后流动站 天津 300072;泰山学院机械与建筑工程学院 山东泰安 271000;西京学院陕西省混凝土结构安全与耐久性重点实验室 陕西西安 710123
- 折叠
摘要
核电站安全壳是切实有效保证核电站安全的必备设施.研究长周期地震动作用下的安全壳隔震性能,对安全壳具有十分重要的理论意义和工程应用价值.以某EPR核电站安全壳为研究模型,考虑了该安全壳自重和预应力系统,采用软件ANSYS建立复杂的三维数值仿真模型,探讨长周期地震动作用下安全壳的变形、加速度、基底剪力和预应力筋的平均应力,证实在长周期地震动作用下,该安全壳受力性能良好,并在控制范围内.基于此,引入层叠橡胶隔震器和软钢隔震器并联的新型隔震装置,进而研究长周期地震动作用下安全壳的隔震性能.分析结果表明:由于地震动的特性(例如,随机性、不确定性、空间相关性等),核电站安全壳设计必须从多方面重视长周期地震动.短周期地震动作用下新型隔震装置是有效的,长周期地震动作用下隔震失效.研究结果为核电站安全壳隔震设计提供技术指导.
Abstract
The containment vessel is the necessary facility to effectively ensure the safety of nuclear power plant,and it is of important values both in theory and engineering to examine the isolation performance of containment vessel under long-period ground motions.In this pa-per,a containment vessel of a nuclear power plant with the evolutionary power reactor(EPR)is taken as the research model,and a 3D com-puter simulated model is established with application of the software ANSYS considering the containment vessel self-weight and pres-tressed tendon system.It is proved that the containment vessel has good mechanical properties and is under control by way of the average stress of prestressed tendons,deformation,acceleration,and base shear of containment vessel under long-period ground motions.For this reason,a new base isolation device made up of the laminated rubber bearing and the mild steel damper in parallel and it is employed to fur-ther investigate the base isolation performance of containment vessel under long-period ground motions.These research findings indicate that the long-period ground motions must be paid attention to in many aspects in the design of nuclear power plant containment vessel due to the ground motion characteristics(for instance,randomness,uncertainty and spatial correlation).The new base isolation device is effec-tive for short-period ground motions,but invalid for long-period ground motions.Hence,it offers the technical guidance for the base isola-tion design of nuclear power plant containment vessel.
关键词
核电站/安全壳/长周期地震动/基础隔震/双线性滞回模型/数值仿真分析Key words
Nuclear power plant/Containment vessel/Long-period ground motions/Base isolation/Bilinear hysteretic model/Finite ele-ment analysis引用本文复制引用
基金项目
泰山学院博士科研启动基金(第一批)(2023)()
西京学院国家级大学生创新创业训练计划(2021)(202112715007X)
出版年
2024
NETL
NSTL
万方数据