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

在北美，很大一部分建筑是用钢支撑框架和钢抗弯框架建造的，以抵御风和地震造成的横向荷载。钢支撑框架存在于垂直桁架中，为结构提供了很大的横向刚度。抗弯框架是由刚性连接在一起的梁和柱建造的。在过去的几十年里，过去地震的研究和经验导致这些框架体系的抗震设计规范和标准发生了重大变化。然而，最近的研究揭示了这些框架结构中的柱的不良稳定破坏，这些破坏在现行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反应，设计策略需要适当地考虑可能的柱稳定破坏，同时将建设成本保持在最低限度。本研究旨在对钢支撑框架柱和抗弯框架柱提出有效的抗震稳定性要求。这将通过全面的全尺寸柱测试和广泛的高级数值模拟来实现。该项目将为下一个加拿大钢铁设计标准提出设计建议，并改进设计工具，供结构工程师在日常工作中使用。

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.