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Application of probabilistic and multiple-criteria techniques in evaluating alternative reinforcement materials for increasing bridge deck life.

机译：概率和多准则技术在评估替代加固材料以延长桥面板寿命中的应用。

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摘要

The efficient management of existing highway bridge infrastructure has become a major social and economic challenge in the United States, particularly in this era that is characterized by aging infrastructure and limited funding for repair and reconstruction. Recognizing that the bridge deck is the most vulnerable component of a bridge, engineers constantly seek cost-effective preservation strategies that yield minimal repair frequency and intensity over the deck life and, ultimately, the least life cycle cost. Traditionally, most bridge preservation decisions have been largely subjective in nature, thus jeopardizing the optimal selection of bridge design and preservation strategies in systematic manner. This research presents a decision support methodology and software solution for a robust analysis of cost-effectiveness of alternative material types for bridge deck reinforcement. The methodology incorporates Monte Carlo simulation techniques that account for the probabilistic nature of the input variables and includes agency and user costs and the deck service life. Engineering economic analyses and Analytical Hierarchical Process techniques are used, together with appropriate weights for the agency and user costs to identify the best alternative material. The study methodology is demonstrated using a case study involving bridge deck reinforcement alternatives of epoxy-coated steel, zinc-clad steel, and stainless steel. On the basis of the multiple criteria considered, the stainless and zinc-clad steels have superior overall long-term performance. It is shown that using corrosion-resistant reinforcing materials can reduce preservation cost and thus lower long-term funding needs.
机译：现有公路桥基础设施的有效管理已成为美国的主要社会和经济挑战，特别是在这个时代，其特点是基础设施老化，维修和重建资金有限。认识到桥面甲板是桥梁中最易受伤害的组成部分，工程师们不断寻求具有成本效益的保护策略，从而在桥面使用寿命内产生最小的维修频率和强度，最终使生命周期成本最小。传统上，大多数桥梁保护决策本质上都是主观的，因此会以系统的方式危及桥梁设计和保护策略的最佳选择。这项研究提出了一种决策支持方法和软件解决方案，用于对桥面加固的替代材料类型的成本效益进行稳健的分析。该方法采用了蒙特卡洛模拟技术，该技术考虑了输入变量的概率性质，并且包括代理商和用户的费用以及甲板使用寿命。使用工程经济分析和层次分析技术，以及代理商和用户成本的适当权重，以确定最佳的替代材料。该研究方法通过案例研究得到证明，该案例研究涉及环氧涂层钢，镀锌钢和不锈钢的桥面钢筋替代品。根据所考虑的多个标准，不锈钢和镀锌钢的整体长期性能优异。结果表明，使用耐腐蚀增强材料可以降低保存成本，从而降低长期资金需求。

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  • 作者

    Samdariya, Ashish.;

  • 作者单位

    Purdue University.;

  • 授予单位 Purdue University.;
  • 学科 Engineering Civil.
  • 学位 M.S.C.E.
  • 年度 2012
  • 页码 87 p.
  • 总页数 87
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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