Numerical modelling methods for seismic soil-structure-interaction analysis

地震土-结构相互作用分析的数值模拟方法

基本信息

  • 批准号:
    452612-2013
  • 负责人:
  • 金额:
    $ 1.82万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Engage Grants Program
  • 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

项目摘要

The research aims to understand the accuracy and limitations of commonly used numerical modelling methods for seismic soil-structure-interaction (SSI) analysis. To accurately simulate the seismic SSI effect, it is necessary to model various components such as seismic wave propagation from bedrock to surface through inelastic soil medium, inelastic behaviour at the soil-foundation interface (gap opening/closing, friction, soil yielding), dynamic response of the structure, and radiation of wave due to the dynamic response of the structure. Modelling all these components requires significant efforts and computing time. Thus, only a few attempts have been made so far in which the inelastic soil-structure system is modelled comprehensively. In the current seismic design and performance assessment practice, the seismic SSI is accounted for by using simplified modelling methods. For example, the effects of foundations are often approximately modelled using a secant stiffness at the maximum response of the foundation. In many research projects, the foundation is modelled by assigning nonlinear springs either as a single lumped spring or as Winkler-type springs. Sometimes lumped mass and damping elements are assigned in various configurations to simulate inertial interaction effect. The accuracy of these modelling methods in comparison with the comprehensive numerical modelling approach has not been clearly understood. The main scope of the proposed study is to understand the accuracy of different modelling methods such as 1) a comprehensive finite element (FE) model including inelastic wave propagation from bedrock to surface and nonlinear SSI effect, 2) an FE model in which the free field surface motion is applied as an effective force to a structure, and 3) a SSI model in which the effect of soil and foundation is considered using a nonlinear coupled macro element. The research results will provide confidence on the simplified modelling methods. Successful completion of the project will lead to implementation of the simplified modelling methods in the products of the industry partner.
本研究旨在了解地震土-结构相互作用(SSI)分析常用数值模拟方法的准确性和局限性。为了准确模拟地震SSI效应,有必要对各种组件进行建模,例如通过非弹性土壤介质从基岩到地表的地震波传播、土壤-基础界面的非弹性行为(间隙打开/关闭、摩擦、土壤屈服)、结构的动态响应以及由于结构的动态响应引起的波辐射。对所有这些组件进行建模需要大量的工作和计算时间。因此,只有少数尝试已经取得了迄今为止,其中的非弹性土结构系统的全面建模。在当前的抗震设计和性能评估实践中,地震SSI是通过使用简化的建模方法来计算的。例如,基础的影响通常在基础的最大响应处使用割线刚度近似建模。在许多研究项目中,通过将非线性弹簧分配为单个集中弹簧或Winkler型弹簧来模拟基础。有时,集中质量和阻尼元件被分配在不同的配置,以模拟惯性干扰效应。与综合数值模拟方法相比,这些模拟方法的准确性尚未得到明确理解。拟议研究的主要范围是了解不同建模方法的准确性,例如1)综合有限元(FE)模型,包括从基岩到地表的非弹性波传播和非线性SSI效应,2)FE模型,其中自由场地表运动作为有效力施加到结构上,(3)采用非线性宏单元耦合考虑地基土效应的SSI模型。研究结果将为简化建模方法提供信心。该项目的成功完成将导致在行业合作伙伴的产品中实施简化的建模方法。

项目成果

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Kwon, OhSung其他文献

Changes of Normal Adult Physiological States and Gait Parameters with Treadmill Inclined
  • DOI:
    10.1589/jpts.24.805
  • 发表时间:
    2012-10-01
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Lee, YongWoo;Kwon, OhSung;Lee, SeungWon
  • 通讯作者:
    Lee, SeungWon

Kwon, OhSung的其他文献

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{{ truncateString('Kwon, OhSung', 18)}}的其他基金

Cyber-physical model of civil infrastructure system subjected to extreme loads
极端载荷下民用基础设施系统的网络物理模型
  • 批准号:
    RGPIN-2021-03430
  • 财政年份:
    2022
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual
Development of hybrid simulation methods for high-rise buildings and long-span bridges subjected to wind load
高层建筑和大跨桥梁风荷载混合模拟方法开发
  • 批准号:
    549582-2019
  • 财政年份:
    2021
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Alliance Grants
Performance-based seismic design method based on Building Information Modelling
基于建筑信息模型的性能化抗震设计方法
  • 批准号:
    562502-2021
  • 财政年份:
    2021
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Alliance Grants
Cyber-physical model of civil infrastructure system subjected to extreme loads
极端载荷下民用基础设施系统的网络物理模型
  • 批准号:
    RGPIN-2021-03430
  • 财政年份:
    2021
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual
Development of hybrid simulation methods for high-rise buildings and long-span bridges subjected to wind load
高层建筑和大跨桥梁风荷载混合模拟方法开发
  • 批准号:
    549582-2019
  • 财政年份:
    2020
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Alliance Grants
Advanced sensing, control, and high-temperature heating system for testing of structural members under extreme loads
先进的传感、控制和高温加热系统,用于在极端载荷下测试结构构件
  • 批准号:
    RTI-2021-00215
  • 财政年份:
    2020
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Research Tools and Instruments
Simulation of an Urban Infrastructure under Extreme Loads through a Network of Interactive Physical and Numerical Components
通过交互式物理和数字组件网络模拟极端负载下的城市基础设施
  • 批准号:
    RGPIN-2016-06126
  • 财政年份:
    2020
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual
Seismic performance assessment of eccentrically braced frames with cast steel link elements through hybrid simulations
通过混合模拟评估带有铸钢连接元件的偏心支撑框架的抗震性能
  • 批准号:
    560261-2020
  • 财政年份:
    2020
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Alliance Grants
Development of replaceable cast steel links for eccentrically braced steel frames and performance assessment of structures adopting the links
偏心支撑钢框架可更换铸钢连杆的开发及采用该连杆的结构的性能评估
  • 批准号:
    505341-2016
  • 财政年份:
    2019
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Collaborative Research and Development Grants
Simulation of an Urban Infrastructure under Extreme Loads through a Network of Interactive Physical and Numerical Components
通过交互式物理和数字组件网络模拟极端负载下的城市基础设施
  • 批准号:
    RGPIN-2016-06126
  • 财政年份:
    2019
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual

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  • 批准年份:
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