核电站结构地震响应分析——基于不同计算方法考虑基础提离

发布时间：2018-01-02 14:11

本文关键词：核电站结构地震响应分析——基于不同计算方法考虑基础提离　出处：《土木工程学报》2014年S2期 　论文类型：期刊论文

【摘要】：为克服传统接触面单元方法中非线性计算收敛困难的问题,首先提出一种新的考虑基础提离的方法——弹簧单元法,即在结构基础与下卧地基土之间设置弹簧单元考虑土-结构相互作用,再通过设置弹簧单元的荷载-变形曲线(即F-D曲线)使弹簧单元只能提供压力,而不能提供拉力考虑结构基础的提离效应;然后基于某简化核电站结构计,对比分析两种方法的计算效率及结构地震响应。对比分析表明:1弹簧单元法在计算效率上显著优于传统的接触面单元方法;2由于两种方法得到的结构响应差异较小,且弹簧单元法更合理,因而推荐采用文中提出的弹簧单元法考虑基础的提离效应。本文的研究成果可为核电站结构抗震设计分析方法的完善提供参考。
[Abstract]:In order to overcome the problem of convergence of nonlinear calculation in traditional contact surface element method, a new method, spring element method, is proposed to consider the foundation lifting. That is to say, a spring element is set between the structure foundation and the underlying soil to consider the soil-structure interaction, and then by setting the load-deformation curve (F-D curve) of the spring element, the spring element can only provide the pressure. But the tensile force can not be provided to consider the lift effect of the structure foundation. Then, based on a simplified nuclear power plant structure meter, the computational efficiency and seismic response of the two methods are compared and analyzed. The comparison analysis shows that the calculation efficiency of the 1: 1 spring element method is significantly better than that of the traditional contact surface element method. 2 the difference of the structural response between the two methods is small, and the spring element method is more reasonable. Therefore, the spring element method proposed in this paper is recommended to consider the lift effect of the foundation. The research results in this paper can provide a reference for the improvement of seismic design and analysis method of nuclear power plant structures.
【作者单位】：武汉理工大学道路桥梁与结构工程湖北省重点实验室;武汉理工大学;
【基金】：国家自然科学基金青年基金项目(51208406) 教育部留学回国人员科研启动基金中央高校基本科研业务费专项资金项目(2014-IV-088)
【分类号】：TU311.3
【正文快照】： 引的摇晃,并将其基础下的锚杆拉出[1]。如果结构基础提离量较大的话,结构就有可能发生倾覆,如在一些地震中观察到倾覆的纪念碑和墓碑便是结构基础发生提离现象的有力证据。然而或许是在震后调查中难以发现小量的基础提离,目前针对建筑物基础提离的观测还不够丰富,但这并不意

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