Retrofitting Steel Frame-Infill Masonry Walls Using Fiberglass Composite Laminates

使用玻璃纤维复合材料层压板改造钢框架填充砌体墙

• 批准号: 9730646
• 负责人: Mohamed Elgaaly
• 金额: $ 16.46万
• 依托单位: Drexel University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-04-01 至 2003-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9730646&HistoricalAwards=false
• 关键词: Retrofitting; Steel; Frame; Infill; Masonry

9730646 Elgaaly Brick and concrete block masonary infill walls are used extensively in steel frame buildings. They are often considered as non-structural elements. Which has led to poor performance of infilled frame structures when subjected to strong lateral forces. Observations of post-earthquake damages indicate their vulnerability. A retrofitting technique that is easy to apply and that enhances the strength and deformation characteristics of infill masonary walls could potentially reduce the number of failures of infilled frames under earthquake loading. Existing retrofit techniques have several disadvantages such as considerable increase in building weight, difficulties for connection to existing buildings, and high construction cost. In this project, a new technique for retrofitting infill hollow masonry walls utilizing external reinforcement with Fiberglass Composite Laminates (FCL) is proposed. It had several advantages over the existing techniques. A quantitative evaluation of the effectiveness of FCL as a retrofitting technique for steel frames infilled with hollow concrete masonry walls will be conducted. Characterization of material properties of reinforced infill masonry walls will be obtained and used for the analysis and design of retrofitted infilled frames under seismic loads. Further testing and analytical studies will be conducted to examine the interaction between the steel frame and the reinforced infill wall. Through this effort the effectiveness of FCL will be demonstrated and its use as a retrofitting material to enhance the seismic performance of existing infilled frame buildings will be advanced. ***

9730646艾尔加利砖和混凝土砌块填充墙在钢框架建筑中广泛使用。它们通常被认为是非结构元素。这导致填充框架结构在承受较强侧向力时的性能较差。对震后破坏的观察表明，它们的脆弱性。一种易于应用并增强填充墙的强度和变形特性的加固技术可能会潜在地减少填充框架在地震荷载下的破坏次数。现有的改造技术有几个缺点，如建筑重量大幅增加，难以与既有建筑连接，以及建设成本较高。在本项目中，提出了一种采用玻璃纤维复合层板(FCL)体外加固填充空心砌体墙的新技术。与现有的技术相比，它有几个优点。将对FCL作为填充混凝土空心砌块墙的钢框架的一种加固技术的效果进行定量评估。将获得加筋填充砖墙的材料特性的表征，并用于在地震荷载作用下的加筋填充框架的分析和设计。将进行进一步的试验和分析研究，以检查钢框架和加筋填充墙之间的相互作用。通过这一努力，将证明FCL的有效性，并将促进其作为加固材料的使用，以提高现有填充框架建筑的抗震性能。***