Investigation on the effects of liquefaction and soil-structure-interaction on seismic response of structures

该研究计划的目的是研究土与结构之间的动力相互作用如何影响结构的地震反应。对于核电站、储气罐、大跨度桥梁等基础设施和高风险设施的设计，地震作用下的土-结构-结构相互作用是设计过程中需要考虑的重要因素。在建议的研究计划中，将使用高保真数值模拟来研究SSI对桥梁或建筑等结构抗震性能的影响。对于数值调查，将在申请人所在部门的计算机集群上部署有限元分析应用程序。经过验证的土体和结构单元的数值模型将用于研究土体的非线性、液化和SSI对结构抗震性能的影响。除了数值研究外，还将开发一种混合模拟方法，通过网络通信，可以同时模拟土域的数值模型和结构构件的试验试件。对于这项技术开发，将进行概念验证实验，其中将在计算机集群中表示大的土域和基础，并且结构组件，如柱、支座或基础隔震组件，将是实际的物理样本。数值研究和混合模拟方法的发展将为SSI研究的长期研究计划奠定基础。至少有五名高素质人员(HQP)将通过拟议的研究计划接受培训。他们不仅将获得技术技能和新知识，还将通过与欧盟研究伙伴的合作建立专业网络。从长远来看，通过研究计划培训的新发现和HQP将增强加拿大关键结构和基础设施的安全。

The objective of the proposed research program is to investigate how the dynamic interaction between soil and structure affects the seismic response of structures. For the design of essential and high-risk facilities, such as nuclear power plants, natural gas storage tanks, and long-span bridges, the soil-structure-interaction (SSI) during an earthquake event is an important factor that should be considered in the design process. In the proposed research program, high-fidelity numerical simulations will be employed to investigate the effect of SSI on the seismic performance of structures such as bridges or buildings. For the numerical investigation, a finite element analysis application will be deployed on a computer cluster in the applicant's department. Validated numerical models of soil and structural elements will be used to investigate the effects of soil nonlinearity, liquefaction, and SSI on the seismic performance of structures. In addition to the numerical investigation, a hybrid simulation method will be developed in which the numerical model of soil domain and an experimental specimen of a structural component can be concurrently and interactively simulated through network communications. For this technology development, a proof-of-concept experiment will be carried out in which a large soil domain and foundation will be represented in the computer cluster and a structural component, such as a column, bearing, or base isolation component, will be an actual physical specimen. The numerical investigations and the development of hybrid simulation methods will be the basis for the long-term research program on SSI study. At least five highly qualified personnel (HQP) will be trained through the proposed research program. They will not only gain technical skills and generate new knowledge, but also develop professional network through collaboration with research partners in E.U. In the long term, the new findings and HQP trained through the research program will enhance the safety of critical structures and infrastructures of Canada.