Seismically Resilient Concentrically Braced Frames with Replaceable Brace Modules

具有可更换支撑模块的抗震同心支撑框架

• 批准号: 538871-2019
• 负责人: Wiebe, Lydell
• 金额: $ 2.24万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=683724
• 关键词: Seismically; Resilient; Concentrically; Braced; Frames

Concentrically braced frames are a common seismic force resisting system because of their good ductility, together with their ability to meet code-mandated drift limits. To ensure ductility, the HSS brace is commonly slotted and field welded to the gusset plate. This is expensive and complicates quality control, and the damage to this connection from a design-level earthquake is likely to be difficult to repair.To address these issues, a previous collaborative project developed an initial concept for a replaceable brace module. Proof-of-concept testing of the individual modules showed that they could achieve all of the design requirements, and analytical modelling showed that the additional flexibility at beam-column connections would not create problems in typical low- to mid-rise applications.This work represents the next step in the development of this project, extending from the original component testing and modelling to consider the system-level effects of including replaceable brace modules within a building frame. These effects will be evaluated through large-scale physical testing at McMaster University.By developing a new connection detail and improving the understanding of the seismic performance of CBFs, this research is expected to lead to safer and more economical steel structures in seismic areas. This will benefit the industrial partners by making steel more competitive, it will benefit building owners by making building construction more financially viable, and it will benefit the public by enabling safer and more reliable seismic design.

由于其良好的延展性以及达到代码固定的漂移限制的能力，因此具有良好的支撑框架是一种常见的抗震力系统。为了确保延展性，HSS支撑通常会插入并焊接到毛the板上。这很昂贵且使质量控制变得复杂，并且可能难以修复设计级别地震的这种联系。为了解决这些问题，先前的协作项目为可更换的支架模块开发了一个初始概念。概念证明对单个模块的测试表明它们可以达到所有设计要求，分析建模表明，梁柱连接的额外灵活性不会在典型的低至中期应用中造成问题。这项工作。这项工作代表该项目开发的下一步，从原始组件测试和建模延伸，以考虑在建筑物框架内包含可更换支架模块的系统级效果。这些效果将通过麦克马斯特大学的大规模物理测试来评估。通过开发新的联系细节并提高对CBF的地震性能的理解，这项研究有望在地震地区提供更安全，更经济的钢结构。这将使工业合作伙伴通过提高竞争力来使工业合作伙伴受益，它将通过使建筑物在财务上更可行，从而使建筑所有者受益，并通过实现更安全，更可靠的地震设计来使公众受益。