BRITE Synergy: Holistic Framework for Structural Stability Design of Buildings

BRITE Synergy：建筑物结构稳定性设计的整体框架

• 批准号: 2135686
• 负责人: Larry Fahnestock
• 金额: $ 22.12万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-05-15 至 2024-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2135686&HistoricalAwards=false
• 关键词: BRITE; Synergy; Holistic; Framework; Structural

This Boosting Research Ideas for Transformative and Equitable Advances in Engineering (BRITE) Synergy project will synthesize distinct threads of research on building structural stability to create a holistic framework for assessment and design that consistently applies fundamental principles across a broad range of real-world scenarios. These scenarios include: low-seismic where wind is most important and behavior is nominally elastic; moderate-seismic where behavior is often inelastic with low-ductility response and severe degradation; high-seismic where behavior is inelastic with high-ductility response. In all cases, whether response is static or dynamic, the essential cause of instability is the effect of gravity acting on the deformed system configuration. This project will coalesce the current research state-of-the-art and industry state-of-the-practice into a consistent view of stability behavior. The consideration of multiple loading conditions and hazards will encompass a large portion of the building stock in the United States. Ultimately, this project will benefit society by supporting economical design and construction of buildings with resilient performance.The framework for structural stability design of buildings that will be developed in this project will focus on providing persistent positive stiffness across the full range of expected response to counteract P-Delta effects. Although this central concept is simple – the lateral system of the building must have adequate stiffness to resist the applied lateral loads plus the destabilizing effects of gravity loads acting through lateral displacements – its simplicity belies the complexity of stability behavior and the nuances associated with stability design for diverse combinations of demand and structural response. The current stability design framework for non-seismic scenarios, where the structure has modest overstrength and the ultimate strength of the structure occurs prior to significant inelastic deformation, is rigorous, but its focus on force amplification does not translate to seismic scenarios where significant inelastic deformation, overstrength and/or degradation are expected. A consistent focus on stiffness will unify the treatment of building structural stability and provide a coherent philosophy that enables innovation in design and supports development of next-generation building lateral systems.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这个促进工程变革和公平进步的研究理念（BRITE）协同项目将综合关于构建结构稳定性的不同研究线索，以创建一个评估和设计的整体框架，在广泛的现实世界场景中一致应用基本原则。这些场景包括：低震，其中风最重要，行为名义上是弹性的；中震，其中行为通常是无弹性的，具有低延展性响应；高震，其中行为是无弹性的，具有低延展性响应；在所有情况下，无论响应是静态还是动态，不稳定的根本原因是重力对变形系统配置的影响，该项目将结合当前的研究水平和行业状态。对多种荷载条件和危险的考虑将涵盖美国的大部分建筑，最终，该项目将通过支持经济的设计和施工来造福社会。具有弹性性能的建筑物。结构稳定性设计框架该项目中将开发的建筑物将侧重于在整个预期响应范围内提供持续的正刚度，以抵消 P-Delta 效应，尽管这个中心概念很简单 - 建筑物的横向系统必须具有足够的刚度来抵抗 P-Delta 效应。施加的横向载荷加上通过横向位移作用的重力载荷的不稳定效应——其简单性掩盖了稳定性行为的复杂性以及与需求和结构响应的不同组合的稳定性设计相关的细微差别当前的非地震场景稳定性设计框架，在哪里结构具有适度的超强度，并且结构的极限强度发生在显着的非弹性变形之前，是严格的，但其对力放大的关注并不转化为预期显着的非弹性变形、超强度和/或退化的地震场景。刚度将统一对建筑结构稳定性的处理，并提供一个连贯的理念，实现设计创新并支持下一代建筑横向系统的开发。该奖项符合 NSF 的法定使命，并被认为值得支持通过使用基金会的智力优点和更广泛的影响审查标准进行评估。