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

该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的成本效益。 所开发的方法，基于生命周期成本分析，将提供一个参考点，以确定经济的桥梁替代作为桥梁跨度，交通量和气候区域的功能。 所考虑的替代方案是传统的环氧树脂涂层钢筋混凝土桥梁，钢筋混凝土桥梁与外部耐腐蚀措施，和CFRP加固桥梁。 所有备选方案的桥梁几何形状均为后张并排箱梁桥。 寿命周期分析包括初期建设的费用构成;检查、修理和维护费用;用户延误和工作区事故;以及拆除。 分析周期为100年。 在这段时间内，替代品的性能必须相同。 将根据不同实际桥梁的结构条件和常见的桥梁维护实践，提出每个备选方案的活动时间表。 通过确定性和概率性方法进行分析，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，但当CFRP加固是一种具有成本效益的解决方案时，经济模型无法量化。 与传统加固桥梁相比，CFRP减少了未来的维修事件，将抵消较高的初始施工成本。 该建议的方法将允许研究界以及运输机构，纳税人在识别和量化的经济的长期和短期的优势和劣势的桥梁替代品。如果成功，拟议的工作还将有助于其他创新基础设施建筑材料的经济模型的开发。

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.