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

在过去几年中，地震对城市地区的潜在灾难已经在包括海地、新西兰和日本在内的几个国家得到了证明。为了避免灾难性的建筑物倒塌，所有现代建筑物的设计都必须抗震，地震荷载的大小根据建筑物位置的地震活动而变化。即使在加拿大的地区，通常不被认为是地震活跃，地震荷载通常占主导地位的横向荷载抵抗系统的设计。 奥雅纳通过进行抗震设计和结构评估来帮助客户做好地震准备。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，这种系统级的延性只能通过将抗侧力系统的所有部件设计为相同的延性水平来保证。然而，预计可以保持或提高安全性，同时保持或降低施工成本，通过调整组件级的延性要求，在不同的结构区域的不同需求。这个Engage项目将帮助奥雅纳了解保持或增强系统级性能所需的组件级延展性 延展性

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.