Innovative CFRP Prestressed Concrete Box-Beam Bridge System

创新的CFRP预应力混凝土箱梁桥系统

• 批准号: 0408593
• 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: 2004
• 资助国家: 美国
• 起止时间: 2004-05-01 至 2009-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0408593&HistoricalAwards=false
• 关键词: Innovative; CFRP; Prestressed; Concrete; Box

Prestressed concrete box-beams are one of the most commonly used structural components for the construction of small and medium span highway bridges in the United States. However, the problems experienced by this type of bridge in various states are serious. These problems include: (1) deterioration of concrete resulting from corrosion of steel reinforcements, (2) longitudinal cracks in the deck slabs between the box beams, and (3) leakage problems due to the deck slab longitudinal cracks. These combined problems mandate significant and continuously increasing maintenance costs to repair and restore the load carrying capacity of this type of bridge.To solve the above-listed problems, an innovative design and construction approach of a new and long lasting box-beam bridge system using carbon fiber reinforced polymer (CFRP) needs to be developed, evaluated, and implemented. In addition, the developed approach must allow for the timely reconstruction of box-beam bridges to alleviate the disruption to traffic. This development and evaluation will require extensive collaboration among: CFRP tendon/stirrup fabricators, precaster/contractors, academia, and end users. This study will be conducted at Lawrence Technological University with collaboration from Diversified Composites, Inc, Prestressed System, Inc. (PSI), and Michigan DOT.In the first phase, four full-scale box-beams, two beams with and two beams without PT tendons will be tested under service, fatigue, and ultimate loading. The second phase will address the behavior of two bridge models during various stages of construction and in service.The proposed RUI collaboration will be extended to teaching and seminar activities for our undergraduate students. The FRP producer, precaster, and MDOT engineers will be guest lecturers at LTU. The university undergraduate research team and the industrial partners will provide seminars at the annual meetings of the Associated General Contractors of America (AGC) and at meetings of the Great Lakes DOTs Consortium.Collaboration between university and CFRP-manufacturer/MDOT/CFRP-precaster will result in the development of an innovative corrosion/maintenance-free CFRP prestressed concrete box-beam bridge system.

预应力混凝土箱梁是美国中小跨公路桥梁建设最常用的结构构件之一。然而，这种类型的桥梁在各个州遇到的问题都很严重。这些问题包括：（1）钢筋腐蚀导致混凝土劣化，（2）箱梁之间的桥面板纵向裂缝，以及（3）桥面板纵向裂缝引起的渗漏问题。这些综合问题要求显着且不断增加的维护成本来修复和恢复此类桥梁的承载能力。为了解决上述问题，一种新型持久箱梁桥系统的创新设计和施工方法碳纤维增强聚合物（CFRP）需要开发、评估和实施。此外，所开发的方法必须能够及时重建箱梁桥，以减轻对交通的干扰。这项开发和评估需要以下方面的广泛合作：CFRP 腱/马镫制造商、预制商/承包商、学术界和最终用户。这项研究将在劳伦斯理工大学与 Diversified Composites, Inc.、Prestressed System, Inc. (PSI) 和密歇根州交通部 (Michigan DOT) 合作进行。在第一阶段，使用四个全尺寸箱梁，其中两个梁有梁，两个梁没有梁PT 腱将在使用、疲劳和极限载荷下进行测试。第二阶段将研究两个桥梁模型在施工和使用的各个阶段的行为。拟议​​的 RUI 合作将扩展到我们本科生的教学和研讨会活动。 FRP 生产商、预制商和 MDOT 工程师将担任 LTU 的客座讲师。大学本科研究团队和工业合作伙伴将在美国总承包商协会 (AGC) 年会和五大湖 DOT 联盟会议上举办研讨会。大学与 CFRP 制造商/MDOT/CFRP 预制商之间的合作将从而开发出创新的免腐蚀/免维护 CFRP 预应力混凝土箱梁桥系统。