Optimization and Application of Next Generation Steels in Construction

这项研究旨在通过推动下一代钢材在建筑结构中的应用，在保持经济效益和国内钢铁生产竞争力的同时，促进知识的发展，从而创造出具有可持续性和结构弹性的建筑。一大类新的高性能钢材已被开发用于汽车应用，取得了巨大成功，但在将这些钢材广泛集成到建筑结构中之前，必须克服各种技术挑战。一个潜在的应用是使用厚度类似于下一代汽车钢的薄板的建筑物中的冷弯钢柱和托梁。使用这些新一代钢材可能带来的好处包括更高效的材料使用和建造，以及更低的初始和生命周期成本。这些钢材还为结构工程师和建筑师提供了在设计和施工中创造新解决方案的潜力。本研究的目标是克服下一代钢材在冷弯型钢建筑中应用的障碍，并开始优化这些钢材在该建筑体系中的使用。优化和应用下一代钢在冷弯型钢框架中的使用需要克服科学障碍：工程设计需要对这些独特的坚固但细长的构件进行通用强度预测，需要更深入地了解结构应用所需的材料延性，以便能够以最低成本根据新钢材的要求量身定做，需要针对建筑应用的优化形状来提高效率，并且需要原型解决方案来提供卓越性能的实验证据。将在材料、连接和构件尺度上进行一系列有针对性的实验，并进行计算非线性倒塌模拟和形状优化，以解决在建筑中采用下一代钢的障碍。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

This research aims to advance knowledge leading to buildings with sustainability and structural resilience, while maintaining economic efficiency and the competitiveness of domestic steel production, by advancing the application of next-generation steels into building construction. A large class of new, high-performance steels has been developed for automotive applications to great success, but various technical challenges must be overcome before these steels can be widely integrated into building construction. A potential application is cold-formed steel studs and joists in buildings that employ sheet steels with thicknesses similar to next generation automotive steels. The possible benefits of using these next-generation steels include more efficient material use and construction, and lower initial and life-cycle costs. These steels also offer the potential for structural engineers and architects to create novel solutions in design and construction. The objective of this research is to overcome the barriers in the application of next generation steels to cold-formed steel building construction and begin the optimization of the uses of these steels in this building system. Optimization and application of the use of next generation steels in cold-formed steel framing requires overcoming scientific barriers: generalized strength prediction of these uniquely strong but slender members is needed for engineering design, a deeper understanding of the material ductility that structural applications require is needed so that the new steels can be tailored to their demands at minimum cost, optimized shapes specific to construction applications are needed for efficiency, and prototyped solutions are needed to provide experimental evidence of superior performance. A series of targeted experiments at the material, connection, and member scale will be studied along with computational nonlinear collapse simulations and shape optimization to address the barriers to the adoption of next generation steel in construction.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.