Response of Concrete Containment Structures Considering Soil-Structure Interaction Effects

为了理解和数值描述土-结构相互作用(SSI)效应，过去人们做了大量的工作。这项研究特别感兴趣的是对建造在地下并与周围土壤相互作用的安全壳结构进行适当的分析和设计。当小模块反应堆(SMR)安装在建造在地下的安全壳结构中时，这一点尤为重要。安全壳结构的任何损坏都可能对SMR造成严重后果。在这些结构中，出于功能原因，裂缝和泄漏控制是主要的设计考虑因素。在拟议的研究中，需要确定土壤的存在如何影响安全壳结构的动力响应。在这方面，需要确定一种确定与地面结构有关的反应修正系数的基本方法。在这次调查中，主要问题是由于不同的加载应用，包括地震，安全壳脆弱区域的裂缝发展。这些结构中的裂缝渗漏潜力需要考虑。目前的设计规范和标准没有解决这个问题，这是留给设计工程师在他们的设计中保守地考虑它。这是一个需要详细调查的领域。本研究的主要目的是研究地下混凝土安全壳结构的动力性能。这项研究将使用一种严格的有限元(FE)方法进行，该方法能够考虑土-结构相互作用的影响，并在三维(3D)域中同时考虑几何和材料非线性。在这项研究的过程中，将进行一项调查，以确定建筑规范中定义的不同土类型如何影响此类结构的动力响应。

A great deal of effort has been made in the past in order to understand and numerically formulate thesoil-structure interaction (SSI) effect. Of particular interest in this study is to appropriately analyze and designcontainment structures which are built underground that interact with the surrounding soil. This is of particularsignificance when small module reactors (SMR's) are hosted in a containment structure that is builtunderground. Any damage to the containment structure could have significant consequences on SMRs. Inthese structures, for functionality reasons, crack and leakage control is of prime design consideration. In theproposed study, it is required to determine as how the presence of the soil can affect the dynamic response ofthe containment structures. In this relation, a rationale method to determine the response modification factors inrelation to above ground structures will need to be determined. In this investigation, the major issues are thedevelopment of cracks in the vulnerable regions of the containment due to different loading applicationsincluding seismic. The crack-leakage potential in in these structures needs to be considered. Current designcodes and standards do not address this issue and it is left to design engineers to conservatively consider it intheir design. This is an area that requires a detailed investigation. The main objective of this research is toinvestigate the dynamic behavior of underground concrete containment structures. The study will be carried outusing a rigorous finite element (FE) method capable of including the effect of soil-structure interactionconsidering both geometric and material non-linearities in a three-dimensional (3D) domain. During the courseof this study, an investigation will be carried out to determine how different soil types as defined in buildingcodes affect the dynamic response of such structures.