U.S.-Turkey Cooperative Research: Seismic Retrofitting of Reinforced Concrete Structural Members by Composite Materials

0352947 Parvin描述：该奖项支持俄亥俄州托莱多市托莱多大学土木工程系Azadeh Parvin博士和土耳其伊斯坦布尔Bogazici大学土木工程系Cem Yalcin博士之间的合作研究。 研究的重点是用复合材料对钢筋混凝土结构构件进行抗震加固。 该项目将包括在模拟地震荷载下对用复合材料包裹物加固的钢筋混凝土梁柱节点进行全尺寸试验，以及使用有限元法进行全面分析研究。 破坏性地震作用下，钢筋混凝土梁柱节点的破坏将导致结构的倒塌。结构系统的安全性依赖于这些连接的行为。 改造结构的一种方法是用几层薄纤维复合织物包裹梁柱连接，以提高其承载能力和延性，同时在修复过程中对其使用的干扰最小。 这方面的研究主要集中在按比例缩小的模型，这可能不是在地震荷载作用下的大小结构构件的行为。 全尺寸试样上的实验对于通过小尺寸测试验证理论预测和经验发现至关重要。 这需要博阿齐奇大学提供的资源，并且可以以在美国进行相同测试的一小部分成本实现。 Parvin博士通过参与数值和小规模实验分析，在梁柱节点的缠绕技术方面拥有丰富的经验。 土耳其的主要建筑技术是利用钢筋混凝土建造各种结构，因此研究人员可以随时获得丰富的知识和经验。 该项目将受益于美国和土耳其调查人员所拥有的互补专业知识以及土耳其建筑业和学术界对钢筋混凝土结构的大量领域知识。 适用范围： 这项研究的结果将构成目前在很大程度上不存在的关于这些关节行为的宝贵知识基础，这将使两国在拯救生命和经济方面受益。 该研究将为使用现代纤维复合材料的建筑物和基础设施部件提供有吸引力的维修和改造解决方案。 这些材料在强度、耐腐蚀性、轻质和易于应用方面具有独特的性能，同时增强了结构部件的性能。 钢筋混凝土不仅在美国和土耳其，而且在地球仪中构成了广泛的结构的基本施工技术。 该项目活动涉及一名美国女调查员，并将为托莱多大学的研究生提供一个获得国际研究经验的机会。 它将为来自土耳其的科学家和研究生提供一个机会，将最先进的包裹技术用于关键的结构部件，即梁柱连接。 该项目的结果将在期刊和会议论文集上发表，并将纳入PI提供的研究生课程。 在项目完成后，合作者将提供关于钢筋混凝土结构构件改造的系列讲座。

0352947 ParvinDescription: This award supports a cooperative research between Dr. Azadeh Parvin, Department of Civil Engineering, University of Toledo, Toledo, Ohio, and Dr. Cem Yalcin, Department of Civil Engineering, Bogazici University, Istanbul, Turkey. The focus of the research is seismic retrofitting of reinforced concrete structural members by composite materials. The project will comprise full-scale experimentation on reinforced concrete beam-column joints retrofitted with composite wraps under simulated seismic loadings as well as a comprehensive analytical study using finite element method. Failure of reinforced concrete beam-column connections will result in the collapse of the structure during destructive earthquakes. The safety of structural systems relies on the behavior of these connections. One way of retrofitting structures is to wrap the beam-column connections with few thin layers of fiber composite fabrics to enhance their load carrying capacity and ductility, with minimum disruption to their usage during the rehabilitation procedure. Studies in this are have concentrated on scale-down models, which may not the behavior of size structural members under seismic loads. Experiments on full-scale specimens are essential to validate theoretical predictions and empirical findings through small-scale testing. This requires resources, which are available at Bogazici University, and can be realized at a fraction of the cost of performing the same tests in the United States. Dr. Parvin has experience in wrapping techniques on beam-column joints through involvement in numerical and small-scale experimental analyses. The main construction technology in Turkey utilizes reinforced concrete for a wide spectrum of structures and as such a wealth of knowledge and experience, which is readily available to researchers. This project will benefit from complementary expertise possessed by the US and Turkish investigators and substantial domain knowledge on reinforced concrete structures in Turkish construction industry and academia. Scope: Findings of the study will constitute valuable knowledge base currently nonexistent to a large degree on the behavior of these joints, which will benefit both countries in terms of saving lives and economics. The research will offer an attractive repair and retrofit solution for buildings and infrastructure components using modern fiber composite materials. Such materials have unique properties in terms of strength, resistance to corrosion, lightness, and ease of application while enhancing the performance of structural components. Reinforced concrete constitutes a fundamental construction technology for a wide spectrum of structures not only in US and Turkey, but also around the globe. The project activities involve a female US investigator, and will provide graduate students from the University of Toledo an opportunity for international research experience. It will provide a scientist and graduate student from Turkey an opportunity to use the state-of-the-art wrapping techniques to a critical structural component, the beam-column connection. Results of the project will be published in journals and conference proceedings and will be incorporated in a graduate course offered by the PI. At the completion of the project lecture series on retrofitting reinforced concrete structural members will be offered by the collaborators.