Research Initiation Award: High-Performance Green Bridges

名为“高性能绿色桥梁”的研究启动奖的目标是为高性能绿色桥梁的设计和施工制定一个评级系统，特别强调开发使用复合材料作为内部增强材料的新一代抗震桥梁支柱。研究目标是：通过建立评级系统，确定高性能绿色桥梁的标准，以制定新桥梁的可持续设计和施工认证水平;设计一个结构上可接受的抗震桥梁柱，由纤维增强聚合物（FRP）钢筋组成，作为内部加固和能源装置，以帮助尽量减少残余位移;并通过实验测试和分析模型验证，证明了一种新型桥梁柱的结构性能可以通过FRP筋和能量装置来精心设计和设计，以抵抗中强地震地面运动。教育目标是：在摩根州立大学建立一个现代化的绿色交通基础设施中心;吸引、招募、培训和指导高级结构分析和设计主题领域的本科生;并在学术出版物和会议论文中传播研究结果。该项目的成果将导致下一代可持续发展，高性能桥梁，可选择使用抗震桥柱及其连接件，抗震桥柱及其连接件由外部非粘结FRP筋和内部粘结FRP筋组成，外部非粘结FRP筋用于在地震期间辅助自定心，内部粘结FRP筋用于提供足够的变形能力，和能量装置来吸收地震的能量。外部未粘结的FRP筋预计在地震期间保持弹性，用于“受控摇摆”，这适用于表现出高拉伸强度和非延性行为的FRP筋，应变范围为1- 3%。

The Research Initiation Award entitled - High-Performance Green Bridges - has the goal to formulate a rating system for the design and construction of high-performance green bridges with particular emphasis on the development of a new generation of seismic-resistant bridge columns using composite materials as internal reinforcement. The research objectives are: to define the criteria for a high-performance green bridge through the creation of a rating system to develop sustainable design and construction certification levels of new bridges; to design a structurally admissible and seismically resistant bridge column comprised of fiber reinforced polymer (FRP) bars as the internal reinforcement and energy devices to help minimize residual displacements; and to prove through experimental testing and analytical modeling validation that the structural behavior of a new class of bridge columns can be carefully engineered and designed with FRP bars and energy devices to resist moderate-to-strong earthquake ground motions. The education objectives are: to establish a modern Green Transportation Infrastructure Center at Morgan State University; to attract, recruit, train, and mentor undergraduate students in areas of advanced structural analysis and design topics; and to disseminate the results in scholarly publications and conference papers.The results of the project will lead to the development of the next generation of sustainable, high-performance bridges with options for the implementation of seismically-resistant bridge columns and their connections that consist of externally unbonded FRP bars to aid with self-centering during an earthquake, internally bonded FRP bars to provide sufficient deformability, and energy devices to absorb energy from the earthquake. The externally unbonded FRP bars are expected to remain elastic during an earthquake for "controlled rocking," which is appropriate for FRP bars that exhibit high tensile strength and non-ductile behavior with strains in the range of 1-3%.