考虑SSI效应的核电厂直立翼墙与排水沉管交叉体系静动力响应分析

尹训强; 付忠余

doi:10.11899/zzfy20220406

考虑SSI效应的核电厂直立翼墙与排水沉管交叉体系静动力响应分析

doi: 10.11899/zzfy20220406

大连大学, 建筑工程学院, 大连 116622

基金项目: 国家自然科学基金项目（52108437）；大连市青年科技之星项目（2020RQ057）

详细信息

作者简介:
尹训强，男，生于1986年。博士，副教授，硕士研究生导师。主要从事工程抗震工作。E-mail：yinxunqiang@dlu.edu.cn

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出版历程
- 收稿日期: 2022-08-20
- 刊出日期: 2022-12-31

Static-dynamic Response Analysis of Upright Wing Wall and Drainage Immersed Tube Cross System of NPP Considering SSI Effect

School of Civil Engineering and Architecture, Dalian University, Dalian 116622, Liaoning, China

摘要

摘要: 某核电厂的联合泵房两侧直立翼墙以及排水沉管为交叉设计，且属抗震I类物项，因此，考虑土-交叉体系结构动力相互作用是抗震安全性评价的关键技术问题。以实际核电厂条件为背景，基于ANSYS分析平台建立了翼墙-沉管交叉体系-地基静动力分析模型，运用UPFs创建的粘弹性边界单元考虑无限地基辐射阻尼影响及地震动的输入，并精细化模拟地基材料的力学特性及交叉体系的空间分布形态，开展了静动力荷载联合作用下翼墙-沉管交叉体系的响应分析，探究交叉体系结构的应力、变形及加速度峰值等响应的变化规律。计算结果表明：直立翼墙与排水沉管交叉部位出现了应力集中现象，翼墙结构的竖向加速度响应与竖向及顺沉管水平向位移变形有较大变化，沉管在交叉部位的响应也有显著增加。研究成果可为核电厂取水工程构筑物的类似交叉体系设计提供技术参考。
- 核电厂 /
- 直立翼墙 /
- 排水沉管 /
- 土-结构相互作用 /
- 静动力分析
Abstract: The upright wing walls on both sides of the joint pump house and the drainage immersed tube of a nuclear power plant are crossed design and belong to the seismic class I items, therefore, considering that the soil-crossing system structural dynamic interaction is a key technical issue for seismic safety evaluation. Based on the actual nuclear power plant site conditions, the ANSYS analysis platform is used to establis h a hydrostatic analysis model of the wing wall-immersed tube crossover system-foundation, through the viscoelastic boundary units created by running UPFs to consider the influence of infinite foundation radiation damping and the input of ground vibration, and refine the simulation of the mechanical properties of the foundation materials and the spatial distribution pattern of the crossover system. The response analysis of the crossed wing wall-immersed tube system was carried out to investigate the changes of stress, deformation and acceleration peak of the crossed system. The calculation results show that the stress concentration phenomenon occurs at the intersection of the upright wing wall and the drainage immersed tube, and the vertical acceleration response of the wing wall structure had a great change from the vertical and horizontal displacement deformation of the drainage immersed tube, and the response of the immersed tube in the intersection had also increased significantly. The research results can provide technical reference for the design of similar crossover systems for nuclear power plant water intake engineering structures.
- Nuclear power plants /
- Upright wing walls /
- Drainage immersed tube /
- SSI /
- Static-dynamic analysis

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图 1 翼墙-沉管交叉体系平面布置图

Figure 1. Plan layout of wing wall-immersed tube crossover system

下载: 全尺寸图片幻灯片

图 2 翼墙-沉管交叉体系-地基静动力分析模型

Figure 2. Wing wall-immersed tube crossover system-soil static and dynamic analysis model

下载: 全尺寸图片幻灯片

图 3 交叉体系-土相互作用分析模型

Figure 3. Analytical model for crossover system-soil interactions

下载: 全尺寸图片幻灯片

图 4 翼墙与沉管结构有限元模型

Figure 4. Finite element model of wing wall and immersed tube structure

下载: 全尺寸图片幻灯片

图 5 输入地震动时程曲线

Figure 5. Time history curve of the seismic wave

下载: 全尺寸图片幻灯片

图 6 交叉体系结构应力云图（单位：兆帕）

Figure 6. The principal stress of crossover system（Unit: MPa）

下载: 全尺寸图片幻灯片

图 7 交叉体系加速度监测点分布

Figure 7. Crossover system acceleration monitoring point distribution

下载: 全尺寸图片幻灯片

图 8 直立翼墙加速度峰值沿高程分布

Figure 8. Peak acceleration distribution along the elevation of the upright wing wall

下载: 全尺寸图片幻灯片

图 9 排水沉管加速度峰值顺管线分布

Figure 9. Peak acceleration distribution along the tube line of drainage immersed tube

下载: 全尺寸图片幻灯片

图 10 交叉体系位移变形分布云图（单位：毫米）

Figure 10. Cloud map of displacement deformation distribution of crossover system（Unit: mm）

下载: 全尺寸图片幻灯片

表 1 三维抗震模型分析材料计算参数

Table 1. The material calculation parameters of 3D seismic model analyzes

材料类型	材料密度 /kg·m⁻³	动弹性模E_d/MPa	静弹性模量E/MPa	动泊松比μ_d	泊松比μ	阻尼比
混凝土C40	2500	42250	32500	0.2	0.2	0.05
堤心石	2000	400	100	0.42	0.33	0.05
碎石、二片石垫层	2100	400	100	0.42	0.33	0.05
开山石碴料	2000	350	50	0.43	0.33	0.05
厂区回填料	2000	350	50	0.43	0.33	0.05
粉质黏土	1990	390	24.9	0.43	0.33	0.05
中风化花岗岩	2610	13230	16150	0.35	0.25	0.05
微风化花岗岩	2640	31860	25010	0.30	0.25	0.05

下载: 导出CSV

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