SGER: Life Cycle Cost Analysis for the Use of CFRP in Prestressed

SGER：预应力中使用 CFRP 的生命周期成本分析

• 批准号: 0911091
• 负责人: Nabil Grace
• 金额: --
• 依托单位: Lawrence Technological University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-01-01 至 2010-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0911091&HistoricalAwards=false
• 关键词: SGER; Life; Cycle; Cost; Analysis

This grant provides funding for development of an engineering methodology for quantifying the cost-effectiveness of corrosion-resistant Carbon Fiber Reinforced Polymer (CFRP) prestressed and reinforced concrete highway bridges. The developed methodology, based on life cycle cost analysis, will provide a point of reference for determining the economical bridge alternative as a function of bridge spans, traffic volume, and climate region. The alternatives considered are a traditional epoxy coated steel reinforced concrete bridge, a steel reinforced bridge with external corrosion resisting measures, and a CFRP reinforced bridge. The bridge geometry for all alternatives is a post-tensioned side-by-side box beam bridge. The life cycle analysis includes cost components of initial construction; inspection, repair and maintenance cost; user delays and work-zone accidents; and demolition. The analysis period is 100 year. Throughout this period, the performance of the alternatives must be the same. An activity timing plan for each alternative will be proposed based on structural conditions of different real-life bridges and common bridge maintenance practices. The analysis is performed through a deterministic and a probabilistic approach.The results of this research will promote the implementation of CFRP as main reinforcement in highway bridges. While prior field and laboratory investigations have proven the structural performance of CFRP reinforcement, economic models are not available to quantify when CFRP reinforcement is a cost-effective solution. The reduced future repair events of the CFRP compared to the traditional reinforced bridge will offset the higher initial construction cost. This proposed methodology will allow the research community as well as the transportation agencies, taxpayers in identifying and quantifying the economical long-term and short-term advantages and disadvantages of bridge alternatives. If successful the proposed work will also contribute to the development of economic models for other innovative infrastructure construction materials.

该赠款为开发一种工程方法提供资金，用于量化耐腐蚀碳纤维增强聚合物 (CFRP) 预应力和钢筋混凝土公路桥梁的成本效益。 所开发的方法基于生命周期成本分析，将为根据桥梁跨度、交通量和气候区域确定经济的桥梁替代方案提供参考。 考虑的替代方案是传统的环氧涂层钢筋混凝土桥梁、具有外部防腐措施的钢筋桥梁和CFRP钢筋桥梁。 所有替代方案的桥梁几何形状都是后张并排箱梁桥。 生命周期分析包括初始建设的成本组成部分；检查、维修和保养费用；用户延误和工作区事故；和拆除。 分析期限为100年。 在此期间，替代方案的性能必须相同。 将根据不同现实桥梁的结构条件和常见的桥梁维护实践，提出每种方案的活动时间计划。 通过确定性和概率性方法进行分析。本研究结果将促进CFRP作为公路桥梁主要加固材料的实施。 虽然先前的现场和实验室调查已经证明了 CFRP 加固的结构性能，但经济模型无法量化 CFRP 加固是否是一种具有成本效益的解决方案。 与传统钢筋桥梁相比，碳纤维增强塑料未来修复事件的减少将抵消较高的初始建设成本。 所提出的方法将允许研究界以及运输机构、纳税人识别和量化桥梁替代方案的经济长期和短期优缺点。如果成功，拟议的工作还将有助于开发其他创新基础设施建设材料的经济模型。