详情

Fatigue Life Analysis of Reinforced Concrete Beams Strengthened with Composites

项目名称：	Fatigue Life Analysis of Reinforced Concrete Beams Strengthened with Composites
摘要：	Extending the service life of existing structures through their rehabilitation and strengthening rather than demolishing to build a new construction is not only a sustainable choice but also cost effective. For key transportation structures, repairing or strengthening rather than substituting a bridge element may benefit the economy of an entire community. Fiber-reinforced composites have been proven to be an effective solution to increase or restore the capacity of reinforced concrete (RC) members. The most common type of composite is fiber-reinforced polymer (FRP) composites that are comprised of continuous fibers embedded in an organic matrix such as epoxy. Although the FRP technology has been abundantly studied, certain drawbacks, such as the low glass transition temperature and the difficulty of applying the composite on wet surfaces, raise some questions on the use of FRPs. A new type of composite, often called fiber-reinforced cementitious matrix (FRCM) composite, that employs inorganic matrices appears to be a viable alternative to FRP in some key applications. However, as the bond mechanisms of FRCMs are somehow different from those of FRP, there is an urgent need of understanding the fatigue behavior of FRCM-strengthened RC beams and increase the knowledge on the fatigue response of FRP-strengthened RC beams. The proposed research aims at providing design recommendations on the use of FRCM composites for structures subjected to fatigue loading and providing practitioners and department of transportation (DOT) personnel with guidelines on the fatigue limits of RC structures strengthened with FRP and FRCM composites. An experimental campaign at the material and structural levels will be used to build a fatigue model of the bond behavior that could be implemented in numerical simulations to study the key parameters of the fatigue response of strengthened beams and therefore allow to determine the conditions under which FRCM rather than FRP could be a more suitable solution.
状态：	Active
资金：	58110
资助组织：	Transportation Infrastructure Durability & Life Extension<==>Office of the Assistant Secretary for Research and Technology
项目负责人：	Shi, Xianming
执行机构：	Case Western Reserve University
开始时间：	20200701
预计完成日期：	20200630
实际结束时间：	20210630
主题领域：	Bridges and other structures；Design；Highways；Maintenance and Preservation；Materials