Experimental Evaluation of Stability Response in Steel Framed Structures under Seismic Loading

北美的大部分建筑物都是用钢支撑框架和钢抗弯矩框架建造的，以抵抗风和地震引起的侧向载荷。钢支撑框架由垂直桁架组成，为结构提供较大的横向刚度。抗弯矩框架由梁和柱紧密连接在一起而成。在过去的几十年里，过去地震的研究和经验导致了这些框架系统抗震设计规范和标准的重大变化。然而，最近的研究表明，这些框架结构中柱的稳定性失效在现行的钢结构设计标准中没有得到适当的解决，需要进一步的研究。为了确保钢框架在未来地震事件下的可预测和安全响应，设计策略需要适当考虑可能的柱稳定性失效，同时将施工成本降至最低。本研究项目旨在制定有效的钢支撑框架和抗弯矩框架柱的地震稳定性要求。这将通过全面的全尺寸柱测试和广泛的先进数值模拟来实现。该项目将为下一个加拿大钢铁设计标准和改进的设计工具提供设计建议，供结构工程师在日常实践中使用。

A large portion of buildings in North America are built with steel braced frames and steel moment-resisting frames to resist lateral loads due to winds and earthquakes. Steel braced frames consist in vertical trusses that provide large lateral stiffness to structures. Moment-resisting frames are built from beams and columns that are rigidly connected together. In the last decades, research and experience from past earthquakes have led to significant changes in codes and standards for the seismic design of these framing systems. However, recent research has revealed undesirable stability failures of columns in these frame structures that are not properly addressed in current steel design standards and require further investigation. To ensure predictable and safe response of steel frames under future seismic events, design strategies are needed that properly account for possible column stability failures while maintaining construction costs to minimum. This research project aims to develop effective seismic stability requirements for columns of steel braced frames and moment-resisting frames. This will be achieved through comprehensive full-scale column testing and extensive advanced numerical simulations. The project will lead to design recommendations for the next Canadian steel design standards and improved design tools to be used by structural engineers in their day-to-day practice.