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

这个合作赠款机会学术联络与行业（GOALI）项目寻求结构设计实践的建筑物从一个基于建筑物的各个部分（组件）的安全性和可靠性的基础上的建筑物的结构系统的安全性和可靠性的转变：屋顶，墙壁和地板。这种设计实践的变化有可能导致更安全和更经济高效的建筑。最初的应用对象是冷弯型钢框架建筑。该行业的合作伙伴美国钢铁协会是美国钢铁生产商的一个财团，率先制定了冷弯型钢建筑设计的规范和标准。行业合作伙伴将直接与学术研究团队合作，以确保行业利用系统可靠性的最新研究成果，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，沿着一系列对冷弯型钢框架墙，地板，和屋顶桁架-所有的设计都是为了展示建筑物的构件和系统可靠性是如何相互作用的。本研究的主要目标是提供一条从构件-基于系统的过程，可以通过设计代码的修改，使设计工程师访问，但它是基于严格的分析。具体的研究目标是：（1）列举一般系统-子系统-部件层次结构;（2）开发由实验和高保真模拟支持的子系统-部件可靠性程序;（3）在规范和标准中应用子系统相关部件可靠性。该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故障模式。新的可靠性灵敏度分析和结构仿真使优化引擎。研究目标将与教育和外联举措相结合，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.