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

这个PFI：加速创新研究（AIR）技术转化（TT）项目的重点是翻译一项关于使用穿孔波纹钢甲板作为护套的研究发现，以满足中层轻框架建筑对不燃高性能剪力墙的需求。在美国，中低层建筑占建筑物的大多数。中高层多户住宅（4-9层）正成为满足人口增长和城市化日益增长需求的住房趋势。冷弯型钢（CFS）的使用对于中层轻框架建筑具有很高的成本效益。然而，由于不燃性和高结构性能（抗剪强度、刚度、延性）的要求，现有的剪力墙技术阻碍了CFS在中高层建筑中的应用。该项目将产生提议的不燃高性能钢剪力墙技术的原型。该新技术具有以下独特之处：a)利用护套中的穿孔作为耗能熔断器，实现高延展性；B)利用护套中的波纹实现高强度和刚度；c)只使用粮安委成员；D)所述护套与框架的连接方式优化为高效率；E)与非剪力墙厚度相同；f)它使工程师能够控制损坏位置，使其远离关键的建筑部件。这些特点与目前最先进的技术相比具有以下优势：结构性能更高，整体成本更低，不燃烧，破坏机制可控，与中高层建筑市场上领先的竞争技术相比，即人造板剪力墙，钢板剪力墙，钢-石膏复合板剪力墙和斜向钢带支撑剪力墙。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。它将研究在CFS框架内定位波纹甲板的可行性，以便在保持高结构性能的同时形成标准壁厚。一项主要的研究工作将通过数值模拟和全尺寸实验，开发穿孔、波纹和CFS框架细节的最佳参数，以最大限度地提高剪力墙的性能。此外，参与该项目的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。预计，这将对提高美国建筑产业竞争力的中高层建筑产业产生巨大的经济影响。该项目涉及北德克萨斯大学和两个工业合作伙伴Verco Decking Inc.和Nucor Building Systems之间的研究合作。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，并指导这项技术转化工作的商业化方面。

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.