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

这个合作的GOALI学术联络机会(GOALI)项目寻求将建筑物的结构设计实践从基于建筑物单个部件(部件)的安全性和可靠性转变为基于建筑物的结构系统(屋顶、墙壁和楼板)的安全性和可靠性。这种设计实践的改变有可能导致更安全和更经济高效的建筑。最初的应用目标是冷弯型钢框架结构的建筑。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设计规范和标准。该行业合作伙伴将直接与学术研究团队合作，以确保行业正在利用系统可靠性方面的最新研究成果，并确保该研究对冷弯型钢建筑的实际设计产生最大影响。这项研究结合了新的系统可靠性分析模型和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、楼板和屋顶桁架的一系列物理测试-所有这些都是专门设计来演示建筑构件和系统可靠性如何相互作用的。本研究的主要目标是提供一条途径，将结构设计从基于构件的过程转变为基于系统的过程，设计工程师可以通过修改设计规范来获得该过程，但这是基于严格分析的。具体的研究目标是：(1)列举一般的系统-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；以及(3)在规范和标准中应用与子系统相关的部件可靠性。计划的解决方案将确定组成结构系统的主要子系统，然后采用优化来定义适当的部件可靠性，以确保目标系统的可靠性和有利的故障模式。新颖的可靠性-灵敏度分析和结构模拟使优化引擎成为可能。研究目标将与教育和外展倡议相结合，包括与行业咨询委员会的定期会议。

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.