Advancing Tubular Structures

管状结构代表了钢结构的“增长领域”之一，从经济和美学的角度考虑，加拿大在这一领域的专业知识已经闻名。加拿大作为结构管材设计技术（或“专有技术”）和制成品本身的主要出口国，处于令人羡慕的地位。超过一半的北美陆上结构油管（或空心结构管）是由加拿大公司生产的。总之，本文的研究将解决一些有关冷弯高速钢的当代问题，这些问题目前阻碍了该产品在实践中的广泛应用。***短期内，调查的两个重点将集中在：(a)高速钢的动态性能，(b)与高速钢焊接连接有关的几个已知问题。6个具体*项目*地址：(1)双层钢壳混凝土构件的抗爆破和抗冲击性能；（ii）焊接在高速钢上的铸钢连接件的抗爆破和抗冲击性能；（iii） ASTM A1085 HSS（一种新材料）的应用和改进；（iv）分支在不规则位置的hss - hss焊接连接；(v) hss - hss重叠k形连接中的“隐藏焊缝”；（vi）圆形HSS-to-HSS连接的有效焊缝长度。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、现场的大规模结构试验、数值有限元分析（隐式和显式）以及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，这可以通过由申请人指导的大学“关键基础设施弹性中心”（CRCI）及其独特赞助进行验证。从长远来看，这个研究项目处于管状结构知识的前沿，将推动加拿大在结构管技术和应用方面处于国际领先地位。该研究项目进一步扩展和探索了钢铸件在建筑行业中的作用，建立在2004年至2014年申请人在北美创新引入和发展这一概念的基础上。将铸造技术转移到建筑领域，申请人已经成功地将产品商业化，并预示着这两个行业的进一步发展。***保证为学生提供一个刺激的研究培训环境，从本科生到博士后，包括高度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，与专业领域的领导者进行国际接触，在行业实习（包括加拿大和国外）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.