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首页> 外文期刊>Finite elements in analysis & design >Concurrent multi-scale modeling of civil infrastructures for analyses on structural deterioration-PartⅠ: Modeling methodology and strategy
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Concurrent multi-scale modeling of civil infrastructures for analyses on structural deterioration-PartⅠ: Modeling methodology and strategy

机译：用于结构退化分析的民用基础设施并行多尺度建模-第一部分：建模方法与策略

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摘要

This paper aims to develop the methodology and strategy for concurrent finite element modeling of civil infrastructures at the different scale levels for the purposes of analyses of structural deteriorating. The modeling strategy and method were investigated to develop the concurrent multi-scale model of structural behavior (CMSM-of-SB) in which the global structural behavior and nonlinear damage features of local details in a large complicated structure could be concurrently analyzed in order to meet the needs of structural-state evaluation as well as structural deteriorating. In the proposed method, the "large-scale" modeling is adopted for the global structure with linear responses between stress and strain and the "small-scale" modeling is available for nonlinear damage analyses of the local welded details. A longitudinal truss in steel bridge decks was selected as a case to study how a CMSM-of-SB was developed. The reduced-scale specimen of the longitudinal truss was studied in the laboratory to measure its dynamic and static behavior in global truss and local welded details, while the multi-scale models using constraint equations and substructuring were developed for numerical simulation. The comparison 6f dynamic and static response between the calculated results by different models indicated that the proposed multi-scale model was found to be the most efficient and accurate. The verification of the model with results from the tested truss under the specific loading showed that, responses at the material scale in the vicinity of local details as well as structural global behaviors could be obtained and fit well with the measured results. The proposed concurrent multi-scale modeling strategy and implementation procedures were applied to Runyang cable-stayed bridge (RYCB) and the CMSM-of-SB of the bridge deck system was accordingly constructed as a practical application.
机译：本文旨在发展用于不同规模水平的民用基础设施并发有限元建模的方法和策略，以分析结构恶化。研究了建模策略和方法，以开发并发多尺度结构行为模型（CMSM-of-SB），其中可以同时分析大型复杂结构中的全局结构行为和局部细节的非线性破坏特征，以便满足结构状态评估以及结构恶化的需求。在所提出的方法中，对于在应力和应变之间具有线性响应的整体结构，采用“大型”建模，对于局部焊接细节的非线性损伤分析，可以使用“小型”建模。选择钢桥面板中的纵向桁架作为案例研究SB的CMSM。在实验室中研究了纵向桁架的缩尺试样，以测量其在整体桁架和局部焊接细节中的动态和静态行为，同时建立了使用约束方程和子结构的多尺度模型进行数值模拟。不同模型计算结果之间的6f动态和静态响应比较表明，所提出的多尺度模型被认为是最有效，最准确的模型。用特定载荷下受测桁架的结果对模型进行验证，结果表明，可以获得局部细节附近材料尺度上的响应以及结构的整体行为，并且与测量结果非常吻合。将提出的并行多尺度建模策略和实现过程应用于润扬大桥斜拉桥（RYCB），从而将桥面系统的CMSM-of-SB构建为实际应用。

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  • 来源
    《Finite elements in analysis & design》 |2009年第11期|782-794|共13页
  • 作者

    Z.X. Li; T.H.T. Chan; Y. Yu; Z.H. Sun;

  • 作者单位

    College of Civil Engineering, Southeast University, 2, Si Pai Lou, Nanjing, Jiangsu 210018, PR China;

    Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong School of Urban Development, Faculty of Built Environment & Engineering, Queensland University of Technology, Queensland, Australia;

    Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong;

    College of Civil Engineering, Southeast University, 2, Si Pai Lou, Nanjing, Jiangsu 210018, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    civil infrastructures; concurrent analyses; multi-scale modeling; health monitoring; runyang yangtse bridge;

    机译：民用基础设施;同步分析;多尺度建模;健康监测;润扬长江大桥;

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