Advancing Tubular Structures

从经济和美观的角度来看，管状结构是钢结构建筑的“增长领域”之一，加拿大已经因其在这一领域的专业知识而闻名。加拿大是一个令人羡慕的地位，是一个突出的出口国的设计技术，为结构管（或“诀窍”）和制造产品本身。超过一半的北美陆上结构管材或中空结构型材（HSS）由加拿大公司生产。总之，本文的研究将解决目前阻碍该产品在实践中广泛应用的与冷弯HSS有关的一些当代问题。* 短期内，调查的两个重点将集中在：（a）高速钢的动态性能，以及（B）与高速钢焊接连接相关的几个已知问题。六个具体 * 项目 * 涉及：（i）混凝土填充双层皮HSS构件的抗爆炸和冲击性能;（ii）焊接到HSS的铸钢连接件的抗爆炸和冲击性能;（iii）ASTM A1085 HSS的应用和改进（一种最近的新材料）;（iv）在不规则位置具有分支的HSS-HSS焊接连接;（v）HSS-HSS重叠K-连接中的“隐藏焊缝”;以及（vi）圆形HSS与HSS连接中焊缝的有效长度。这些项目的研究方法采用小规模的材料测试，中等规模的构件和组件测试在大学实验室，大规模的结构测试在现场，数值有限元分析（隐式和显式），和封闭形式的分析解决方案。项目（i）和（ii）需要通过现场爆炸测试进行验证，这可以通过申请人指导的大学“关键基础设施复原力中心”及其独特的赞助进行。 从长远来看，这项研究 * 计划 *，在管状结构的知识前沿，将推动加拿大进入国际领先地位的结构管材技术和应用。该研究项目进一步扩展和探索了铸钢件在建筑行业中的作用，建立在申请人在2004年至2014年期间在北美创新引入和发展这一概念的基础上。铸造技术向建筑行业的转移已经涉及申请人成功的产品商业化，并预示着两个行业的进一步发展。 为学生提供了一个激励性的研究培训环境，从本科生到博士后研究员，涉及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，国际接触其专业领域的领导者，工业实习（在加拿大和国外）以及积极参与技术转让活动。

Tubular structures represent one of the "growth areas" for steel construction, for both economic and aesthetic reasons, and Canada already has renown for its expertise in this area. Canada is in the enviable position of being a prominent exporter of both design technology for structural tubing (or "know-how") and the manufactured product itself. Over half of all North American on-shore structural tubing - or hollow structural sections (HSS) - is produced by companies of Canadian origin. All together, the research herein will resolve some contemporary issues pertaining to cold-formed HSS that currently hinder the widespread application of the product in practice.***    In the short-term, two thrusts to the investigation will concentrate on: (a) the dynamic performance of HSS, and (b) several known problems related to HSS welded connections. Six specific *projects* address: (i) blast and impact resistance of concrete-filled double-skin HSS members; (ii) blast and impact resistance of cast steel connectors welded to HSS; (iii) application and improvement of ASTM A1085 HSS (a recent new material); (iv) HSS-to-HSS welded connections with branches in irregular locations; (v) "hidden welds" in HSS-to-HSS overlapped K-connections; and (vi) effective lengths of welds in circular HSS-to-HSS connections. 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 analyses (both implicit and explicit), and closed-form analytical solutions. Projects (i) and (ii) entail verification by field blast testing, which is possible through the university's "Centre for Resilience of Critical Infrastructure" (CRCI), directed by the Applicant, and its unique sponsorship.***    In the long-term this research *program*, at the forefront of knowledge on tubular structures, will propel Canada into a leading position internationally for structural tubing technology and application. The research program further extends and explores the roles for steel castings in the construction industry, building on the innovative introduction and development of this concept in North America by the Applicant between 2004 and 2014. This transfer of foundry technology to the building sector has already involved successful product commercialization by the Applicant and heralds even further advances for both industries.***    A stimulating environment for research training is ensured for students, ranging from undergraduates to post-doctoral fellows, involving highly advanced laboratory and field testing methods, use of state-of-the-art analytical and computational tools, international exposure to leaders in their field of specialization, internship placements in industry (both in Canada and abroad) and active participation in technology transfer activities.