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

液化和土-结构相互作用对结构地震响应的影响研究

• 批准号: 402122-2011
• 负责人: Kwon, OhSung
• 金额: $ 1.75万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=529433
• 关键词: Investigation; effects; liquefaction; soil; structure

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.

提出的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、天然气储罐、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-结构相互作用（SSI）是设计过程中应考虑的重要因素。在提出的研究计划中，将采用高保真数值模拟来研究SSI对桥梁或建筑物等结构抗震性能的影响。对于数值调查，将在申请人部门的计算机集群上部署有限元分析应用程序。经过验证的土壤和结构单元的数值模型将用于研究土壤非线性、液化和SSI对结构抗震性能的影响。在数值模拟的基础上，提出了一种混合模拟方法，通过网络通信将土域的数值模型与结构构件的实验试样同时进行交互模拟。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型土壤域和基础，并将结构组件（如柱，轴承或基础隔离组件）作为实际的物理样本。数值研究和混合模拟方法的发展将是SSI研究的长期研究计划的基础。通过拟议的研究计划，将培训至少五名高素质人员（HQP）。他们不仅将获得技术技能和产生新的知识，而且还将通过与欧盟研究伙伴的合作发展专业网络。从长远来看，通过研究项目培训的新发现和HQP将提高加拿大关键结构和基础设施的安全性。