Frontiers of Tubular Structures

管状结构的前沿

• 批准号: RGPIN-2020-04200
• 负责人: Packer, Jeffrey
• 金额: $ 3.79万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=739242
• 关键词: Frontiers; Tubular; Structures

Despite the Canadian economy being approximately one-tenth that of the U.S., over the last 10 years Canada's production of welded tubes [which includes cold-formed hollow structural section (HSS) members], totalling 16.8 million tonnes, represents 91% of the quantity produced in the U.S. (World Steel Association Steel Statistical Yearbook 2018). The value of this manufacturing industry to Canada is enormous, and Canada is also in the enviable position of being a world leader in terms of design "know-how" for structural tubing. The research herein aims to further advance that technological position and will resolve some contemporary issues pertaining to cold-formed HSS that currently hold back even more widespread application of the product in practice.      In the short-term, two thrusts to the investigation will concentrate on: (a) HSS material performance, and (b) several known problems related to bolted and welded HSS connections. Five specific *projects* address: (i) blast resistance of rectangular HSS members under near-field blast loading; (ii) connections between rectangular HSS members using high-strength steel; (iii) swaged and bolted column splices between rectangular HSS members; (iv) bolted flange-plate connections between circular HSS members under combined loads; and (v) through-member T-connections between circular HSS members. The research approaches to these projects employ small-scale material tests, medium-scale member and component testing in the university laboratories, large-scale testing of structures in the field, numerical finite element (both implicit and explicit) analyses, computational fluid dynamics analyses, and closed-form analytical solutions.      The applicant has maintained, and proposes to further extend, a long-term research *program* that has long been at the frontiers of tubular structures. The Applicant's work has resulted in innovations and rational design recommendations for practicing engineers that have set the course for the design of tubular steel structures, in North America and worldwide. By working at the forefront of knowledge on tubular structures, progress from this proposal will keep Canada at the leading edge, internationally, for structural tubing technology and its application.      A stimulating environment for research training is ensured for students, ranging from undergraduates to post-doctoral fellows, involving advanced methods for laboratory and field testing, use of state-of-the-art analytical and computational tools, exposure to international leaders in their field of specialization, internship placements in industry (both in Canada and abroad), and active participation in technology transfer activities.

尽管加拿大的经济规模约为美国的十分之一，但在过去10年里，加拿大的焊接管（包括冷弯空心结构截面（HSS）构件）产量总计1680万吨，占美国产量的91%（世界钢铁协会钢铁统计年鉴2018）。这个制造业对加拿大的价值是巨大的，加拿大在结构管的设计“专有技术”方面也处于令人羡慕的世界领先地位。本文的研究旨在进一步推进这一技术地位，并将解决一些与冷弯高速钢有关的当代问题，这些问题目前阻碍了该产品在实践中的更广泛应用。在短期内，调查的两个重点将集中在：(a) HSS材料性能，以及(b)与螺栓和焊接HSS连接有关的几个已知问题。五个具体*项目*地址：(i)近场爆炸荷载下矩形高速钢构件的抗爆炸性能；（ii）矩形高速钢构件之间的连接采用高强度钢；（iii）矩形高速钢构件之间的柱件焊接和螺栓连接；（iv）复合载荷作用下圆形HSS构件间的法兰-板螺栓连接；(v)圆形HSS构件之间的直通构件t形连接。这些项目的研究方法包括小规模材料试验、大学实验室的中等规模构件和部件试验、现场大规模结构试验、数值有限元（隐式和显式）分析、计算流体动力学分析和封闭形式解析解。申请人维持并建议进一步扩展长期研究项目，该项目长期处于管状结构的前沿。申请人的工作成果为实践工程师提供了创新和合理的设计建议，为北美乃至全球的钢管结构设计奠定了基础。通过在管状结构知识方面的前沿工作，该提案的进展将使加拿大在结构管技术及其应用方面保持国际领先地位。为从本科生到博士后的学生提供了一个刺激的研究培训环境，包括先进的实验室和现场测试方法，使用最先进的分析和计算工具，接触专业领域的国际领导者，在加拿大和国外的工业实习机会，以及积极参与技术转让活动。