摘要
安全壳是确保核电站安全的关键设施,预应力筋施工过程是建立结构受力体系的重要环节,研究其建立过程对安全壳具有重要意义。以某核电站安全壳为背景,选用大型通用有限元软件ANSYS,采用分块方法,快速建立高质量的安全壳有限元模型,不建立沿着预应力筋方向的约束方程,真实模拟施工阶段预应力筋无黏结受力状态,并提出模拟因混凝土弹性变形引起的预应力损失的多次降温法,分析安全壳在预应力筋施工过程中混凝土的应力状态、壳体的变形以及预应力筋的应力,确认在安全壳中建立的预应力与设计相符,为安全壳施工优化等提供参考。
The containment is the key facility to ensure safety of a nuclear power plant , prestressed tendon construction process is an important link for establishing structure system , it was of great significance to study the establishing process.This article was set in a nuclear power plant containment , a large general finite element software ANSYS was selected and a high-quality finite element model was set up quickly with partitioning method , the constraint equations were not set up along the prestressed tendon direction , so that the unbonded prestressed tendon stress state could be simulated truly during prestressed tendon construction; it was put forward multi-cooling-method for simulating the prestress loss caused by concrete elastic deformation , analyzed the concrete stress state , containment deformation and prestressed tendon stress state , hence it was confirmed that the prestress built up in containment was close to the designed prestress , which provided a reliable technical support for containment construction optimization .
出处
《工业建筑》
CSCD
北大核心
2014年第5期95-100,160,共7页
Industrial Construction
基金
国家自然科学基金项目(51178014)
中建二局有限公司科技研发课题(CSCEC2B-2011-K-02)
关键词
核电站安全壳
预应力筋施工
多次降温法
有限元分析
nuclear power plant containment
prestressed tendon construction
multi-cooling-method
finite element analysis
