PFI:AIR - TT: Innovative High-Performance Cold-Formed Steel Wall System for Light Framed Construction

PFI:AIR - TT：用于轻型框架结构的创新高性能冷弯型钢墙体系统

• 批准号: 1445065
• 负责人: Cheng Yu
• 金额: $ 19.97万
• 依托单位: University of North Texas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-08-15 至 2017-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1445065&HistoricalAwards=false
• 关键词: PFI; AIR; TT; Innovative; Performance

This PFI: Accelerating Innovation Research (AIR) Technology Translation (TT) project focuses on translating a research discovery on the use of perforated corrugated steel decks as sheathing to fill the need for non-combustible high-performance shear walls for mid-rise light-framed buildings. Mid- and low-rise buildings comprise the majority of buildings in the United States. The mid-rise multi-family homes (4-9 stories) are becoming the housing trend to meet the increasing demands of population growth and urbanization. The use of cold-formed steel (CFS) would be highly cost-effective for mid-rise light-framed buildings. However the existing shear wall technologies impede the use of CFS in mid-rises due to the requirements of non-combustibility and high structural performance (shear strength, stiffness, ductility). The project will result in a prototype of the proposed non-combustible high-performance steel shear wall technology. This new technology has the following unique features: a) it uses the perforation in the sheathing as energy dissipating fuses to achieve high ductility; b) it uses the corrugation in the sheathing to achieve high strength and stiffness; c) it uses only CFS members; d) the sheathing to framing connection method is optimized for high efficiency; e) it has the same thickness as the non-shear walls; and f) it enables the engineers to control the damage locations to be away from critical building components. These features provide the following advantages over the current state-of-the-art technologies: higher structural performance, lower overall cost, non-combustibility, and controllable failure mechanism when compared to the leading competing technologies, namely the wood based panel shear wall, the steel sheet shear wall, the steel-gypsum composite panel shear wall, and the diagonal steel strap bracing shear wall in the mid-rise construction market.This project addresses the following technology gaps as it translates from research discovery toward commercial application. It will investigate the feasibility of positioning the corrugated deck within the CFS frame in order to form standard wall thicknesses while maintaining high structural performances. A major research effort will be made to maximize the shear wall performance by developing optimal parameters in perforation, corrugation, and CFS framing details via numerical simulations and full-scale experiments. In addition, personnel involved in this project, undergraduate and graduate students, will receive innovation and technology translation experiences through modeling, building, and testing CFS shear walls. The potential economic impact is expected to be significant for the mid-rise construction industry, which will contribute to the U.S. competitiveness in building industries. The project involves research collaboration between the University of North Texas and two industrial partners, Verco Decking Inc. and Nucor Building Systems. The industrial partners will provide deck manufacturing capacities, assist in developing an efficient connection method, and guide commercialization aspects in this technology translation effort.

该PFI：加速创新研究（AIR）技术转化（TT）项目的重点是转化一项关于使用穿孔波纹钢甲板作为护套的研究发现，以满足中层轻型框架建筑对不燃高性能剪力墙的需求。中低层建筑占美国建筑的大多数。中高层多户住宅（4-9层）正在成为住房趋势，以满足人口增长和城市化日益增长的需求。冷弯型钢（CFS）的使用将是非常具有成本效益的中层轻型框架建筑。然而，现有的剪力墙技术阻碍了CFS在中高层建筑中的使用，这是由于对不燃烧性和高结构性能（剪切强度、刚度、延性）的要求。该项目将产生拟议的不燃高性能钢剪力墙技术的原型。这种新技术具有以下独特的特点：a）它使用了在覆板中的穿孔作为耗能保险丝，以实现高延性; B）它使用了覆板中的波纹，以实现高强度和刚度; c）它只使用CFS构件; d）覆板与框架的连接方法被优化以实现高效率; e）它具有与非剪力墙相同的厚度;以及f）它使工程师能够控制损坏位置远离关键建筑部件。这些特征提供了优于当前最先进技术的以下优点：结构性能更高，综合造价更低，不燃，破坏机理可控，与领先的竞争技术木基板剪力墙、钢板剪力墙、钢-石膏复合板剪力墙相比，和斜向钢带支撑剪力墙在中高层建筑市场。该项目解决了以下技术差距，因为它从研究发现转化为商业应用。它将调查的可行性，定位在CFS框架内的波纹甲板，以形成标准的壁厚，同时保持高的结构性能。一个主要的研究工作将作出最大限度地提高剪力墙的性能，通过开发最佳参数，穿孔，粘贴和CFS框架的细节，通过数值模拟和全尺寸实验。此外，参与该项目的人员，本科生和研究生，将通过建模，建造和测试CFS剪力墙获得创新和技术转化经验。潜在的经济影响预计将是显着的中层建筑业，这将有助于美国在建筑业的竞争力。 该项目涉及北德克萨斯大学和两个工业合作伙伴Verco Decking Inc.之间的研究合作。Nucor建筑系统工业合作伙伴将提供甲板制造能力，协助开发有效的连接方法，并指导技术转化工作的商业化方面。