GOALI/Collaborative Research: Advancing System Reliability with Application to Light-Framed Structures

这个学术与工业联络合作项目（GOALI）寻求将建筑结构设计实践从基于建筑单个部件（组件）的安全性和可靠性转变为基于建筑结构系统（屋顶、墙壁和地板）的安全性和可靠性。这种设计实践上的改变有可能带来更安全、更经济的建筑。以冷弯型钢为框架的建筑是最初应用的目标。行业合作伙伴美国钢铁协会（American Iron and Steel Institute）是一个由美国钢铁生产商组成的联盟，带头制定冷弯型钢建筑的规范和标准。行业合作伙伴将直接与学术研究团队合作，确保行业在系统可靠性方面利用最新的研究成果，并确保研究对冷弯型钢建筑的实际设计产生最大的影响。该研究结合了系统可靠性的新分析模型，在建筑设计中实施可靠性的新框架，以及对冷弯型钢框架墙、地板和屋架的一系列物理测试-所有这些都是专门设计的，以展示建筑物的组件和系统可靠性如何相互作用。本研究的主要目标是提供一条将结构设计从基于组件的过程转变为基于系统的过程的路径，这种过程可以通过设计代码修改为设计工程师所访问，但这是基于严格的分析。具体的研究目标是：(1)列举一般的系统-子系统-组件层次结构；(2)建立了以实验和高保真仿真为支撑的子系统部件可靠性流程；(3)子系统相关部件可靠性在规范和标准中的应用。预计的解决方案将确定构成结构系统的主要子系统，然后采用优化来定义适当的组件可靠性，以确保目标系统的可靠性和有利的失效模式。新颖的可靠性灵敏度分析和结构仿真使优化引擎成为可能。研究目标将与教育和推广活动相结合，包括与行业咨询委员会定期举行会议。

This collaborative Grant Opportunities for Academic Liaison with Industry (GOALI) project seeks transformation of structural design practice for buildings from one based on the safety and reliability of the individual pieces (components) of a building to one based on the safety and reliability of building's structural systems: roof, walls, and floors. This change in design practice has the potential to lead to both safer and more economically efficient buildings. Buildings framed from cold-formed steel are targeted for initial application. The industry partner, the American Iron and Steel Institute, is a consortium of the nation's steel producers and spearheads the development of codes and standards for buildings designed from cold-formed steel. The industry partner will work directly with the academic research team to insure that industry is utilizing the latest research findings in system reliability, and to insure the research has maximum impact on the practical design of cold-formed steel buildings. The research combines new analytical models for system reliability, with new frameworks for implementing reliability in building design, along with a series of physical tests on cold-formed steel framed walls, floors, and roof trusses - all specifically design to demonstrate how component and system reliability of buildings interact.The principal goal of this research is to provide a path to transformation of structural design from a component-based process to a system-based process that can be made accessible to design engineers through design code modifications, but which is based on rigorous analysis. Specific research objectives are: (1) enumeration of a general system-subsystem-component hierarchy; (2) development of a subsystem-component reliability procedure supported by experiments and high fidelity simulations; and (3) application of subsystem dependent component reliabilities for codes and standards. The projected solution will identify the primary subsystems that make up a structural system and then employ optimization to define appropriate component reliabilities to ensure a target system reliability and favorable failure mode. Novel reliability-sensitivity analysis and structural simulation enable the optimization engine. The research objectives will be integrated with educational and outreach initiatives, including regular meetings with an Industry Advisory Board.