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

这笔赠款提供资金，用于开发一种工程方法，以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。该方法基于全寿命周期成本分析，将为根据桥梁跨度、交通量和气候区域确定经济的桥梁方案提供一个参考点。考虑的替代方案是传统的环氧涂层钢骨混凝土桥梁、具有外部防腐措施的钢骨混凝土桥梁和碳纤维加固桥梁。所有替代方案的桥梁几何形状都是后张法并排箱梁桥。生命周期分析包括初始建造的成本构成；检查、维修和维护成本；用户延误和工作区事故；以及拆除。分析期为100年。在整个过程中，替代方案的性能必须相同。将根据不同实际桥梁的结构条件和常见的桥梁维护实践，为每个备选方案提出活动时间计划。分析采用确定性和概率性相结合的方法，研究结果将对碳纤维加固在公路桥梁中的应用起到推动作用。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，但没有经济模型来量化CFRP加固是一种经济有效的解决方案。与传统加固桥梁相比，碳纤维加固桥梁的未来维修次数减少，将抵消较高的初始建造成本。这一拟议的方法将使研究界以及运输机构和纳税人能够确定和量化桥梁替代方案的长期和短期经济优势和劣势。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式。

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.