Integrated System and Component Reliability in Seismic Collapse Safety of Structures

非线性计算机建模、地震危险性分析和基于性能的工程的最新进展使得能够更好地科学评估大地震和其他灾害下的建筑物倒塌。然而，虽然现有的方法在表征建筑物的平均响应方面做了合理的工作，但它们缺乏评估性能如何受到建筑材料，设计和施工质量保证的固有可变性影响的解决方案。 该项目旨在通过开发和应用新的方法和数据来解决这一限制，将建模不确定性纳入计算方法，以模拟建筑物，桥梁和其他结构的结构倒塌。该项目包括三项主要任务：（1）通过收集公开的试验数据和其他支持信息和案例历史，开发关于材料、设计和质量保证的可变性的统计数据，（2）开发新的策略，以有效地将建模不确定性纳入非线性动态模拟方法，及（3）实施及实施新方法以评估一组原型建筑结构的倒塌安全性。 由此产生的方法将导致在量化倒塌风险和理解影响建筑物倒塌安全的因素的根本进步。通过开发方法来准确评估影响建筑物倒塌安全的因素，这项研究将能够改进建筑规范和设计与施工实践，从而产生更经济和安全的建筑物。 这些研究成果还将推动基于性能的设计方法的发展，促进创新建筑技术的更快开发和采用。 为了促进向其他研究人员和工程专业人员转让技术，项目研究员将在一个在线网站上公布开放源码软件和数据。这项研究将涉及并提供研究培训，为两个研究生博士生和本科生助理。

Recent advancements in nonlinear computer modeling, seismic hazard analysis, and performance-based engineering are enabling better scientific assessment of building collapse under large earthquakes and other hazards. However, while existing methods do a reasonable job at characterizing the average response of buildings, they lack the resolution to evaluate how the performance is affected by inherent variability in building materials, design and construction quality assurance. This project aims to address this limitation by developing and applying new methods and data to incorporate modeling uncertainties into computational methods to simulate the structural collapse of buildings, bridges and other structures. The project entails three main tasks: (1) developing statistics on the variability in materials, design and quality assurance by collecting published test data and other supporting information and case histories, (2) developing new strategies to efficiently incorporate modeling uncertainties into nonlinear dynamic simulation methods, and (3) to implement and exercise the new approach to assess the collapse safety of a set of archetype building structures. The resulting methods will lead to fundamental advancements in quantifying collapse risk and understanding of factors that affect collapse safety of buildings. By developing methods to accurately evaluate factors that affect building collapse safety, this research will enable improvements to building codes and design and construction practices that will lead to more economical and safe buildings. The research products will also advance the state-of-art in performance based design methods that facilitate more rapid development and adoption of innovative new building technologies. To facilitate technology transfer to other researchers and engineering professionals, the PIs will publish open-source software and data to an on-line web site. The research will involve and provide research training for two graduate doctoral students and undergraduate student assistants.