核电厂房三维有限元模型考虑土-结构相互作用的简化方法

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基金项目:

国家自然基金项目(51408255)

Simple Method for Considering Soil-Structure Interaction in Three-Dimension Infinite Element Model of Nuclear Power Plant Building

1. Nuclear and Radiation Safety Center, Ministry of Environmental Protection, Beijing, 100082, China;
2. School of Architecture & Civil Engineering, Liaocheng University, Liaocheng, Shandong, 252000, China;
3. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning, 116024, China

摘要: 为将集总的半无限地基动刚度等效离散给三维厂房结构的筏板基础,借鉴简化的集中质量厂房模型考虑土-结构相互作用(SSI)分析方法,通过力矩等效,推导三维厂房结构考虑SSI的弹簧-阻尼器等效离散模型,并通过模态分析和动力时程分析验证了此等效离散方法的正确性和合理性。这种第一步求解集总的地基动刚度,然后基于通用的有限元软件在三维厂房筏板基础施加弹簧-阻尼器的方法,相对于其他人工边界法更简便易行,便于工程应用。
- 土-结构相互作用 /
- 地基动刚度 /
- 等效离散 /
- 三维核电厂房
Abstract: In order to equivalently disperse the lumped soil dynamic stiffness of half space for the raft foundation of 3-D nuclear power plant building, the formula of spring-damping model of considering soil-structure interaction（SSI） for 3-D nuclear power plant building is deduced based on the lumped mass model considering SSI. This method of equivalently disperse is validated by modal analysis and dynamic time history analysis. This method solves the soil dynamic stiffness firstly, and then exerts the spring-damping element at the raft foundation of 3-D nuclear power plant building, which is easier and simpler to realize, compared to other artificial boundary methods.
- Soil-structure interaction（SSI） /
- Soil dynamic stiffness /
- Equivalently disperse /
- 3-D nuclear power plant building