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

这项拨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。基于生命周期成本分析的开发方法，将为确定经济的桥梁替代方案提供参考点，作为桥梁跨度，交通量和气候区域的函数。考虑的替代方案是传统的环氧涂层钢筋混凝土桥，具有外部抗腐蚀措施的钢筋桥和CFRP加固桥。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成本组成部分；检查、维修和保养费用；用户延误和工作区域事故；和拆迁。分析周期为100年。在此期间，备选方案的性能必须相同。每个备选方案的活动时间计划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。分析是通过确定性和概率方法进行的。本研究成果将促进碳纤维布作为公路桥梁主加固的实施。虽然之前的现场和实验室研究已经证明了碳纤维布加固的结构性能，但当碳纤维布加固是一种经济有效的解决方案时，经济模型无法量化。与传统的钢筋桥相比，碳纤维增强塑料减少了未来的维修事件，将抵消较高的初始建设成本。这一建议的方法将使研究界以及运输机构、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，拟议的工作也将有助于其他创新基础设施建筑材料的经济模式的发展。

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.