Seismic design of steel buildings: relating component- and system-level ductility

钢结构建筑的抗震设计：关联构件级和系统级延展性

• 批准号: 478201-2015
• 负责人: Wiebe, Lydell
• 金额: $ 1.82万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=579365
• 关键词: Seismic; design; steel; buildings; relating

Over the last few years, the calamitous potential of earthquakes on urban areas has been demonstrated in several countries, including Haiti, New Zealand, and Japan. To avoid catastrophic building collapse, all modern buildings must be designed to resist earthquakes, with the magnitude of earthquake loads varying according to the seismicity of the building location. Even in regions of Canada that are not often thought of as seismically active, earthquake loads typically dominate the design of lateral load resisting systems. Arup helps their clients prepare for earthquakes by conducting seismic design and assessment of structures. Modern seismic design and assessment is based on ensuring that there is enough system-level ductility that a structure can withstand the earthquake-imposed deformations without collapse. The assumption is typically that this system-level ductility can be assured only by designing all components of the lateral load resisting system for the same level of ductility. However, it is expected that safety could be maintained or enhanced, while simultaneously maintaining or reducing construction costs, by tailoring the requirements for component-level ductility to the varying demands in different regions of a structure. This Engage project will help Arup to understand what component-level ductility is required to maintain or enhance system-level ductility.

在过去的几年里，地震对城市地区的灾难性潜力已经在几个国家得到了证明，包括海地、新西兰和日本。为了避免灾难性的建筑倒塌，所有现代建筑都必须设计成抗震的，地震荷载的大小根据建筑位置的地震活动而变化。即使在加拿大那些不经常被认为是地震活跃的地区，地震荷载通常也是横向荷载抵抗系统设计的主导因素。 奥雅纳通过进行结构的抗震设计和评估，帮助他们的客户为地震做好准备。现代抗震设计和评估的基础是确保有足够的系统级延性，使结构能够承受地震施加的变形而不倒塌。通常的假设是，只有通过为相同的延性水平设计抗侧向载荷体系的所有部件，才能确保该系统水平的延性。然而，通过根据结构不同区域的不同要求对部件级延性的要求进行调整，可以在保持或降低施工成本的同时保持或提高安全性。该Engage项目将帮助Arup了解维护或增强系统级所需的组件级延展性 延展性。