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

地震荷载下钢框架结构稳定性响应试验评价

基本信息

批准号：
536344-2018
负责人：
Imanpour, Ali
金额：
$ 5.13万
依托单位：
University of Alberta
依托单位国家：
加拿大
项目类别：
Collaborative Research and Development Grants
财政年份：
2020
资助国家：
加拿大
起止时间：
2020-01-01 至 2021-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=699159
关键词：
Experimental Evaluation Stability Response Steel

项目摘要

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.

北美大部分建筑物均采用钢支撑框架和钢抗弯框架建造，以抵抗风和地震引起的侧向荷载。钢支撑框架由垂直桁架组成，为结构提供较大的横向刚度。抗力矩框架由刚性连接在一起的梁和柱构成。在过去的几十年中，过去地震的研究和经验导致这些框架系统的抗震设计规范和标准发生了重大变化。然而，最近的研究表明，这些框架结构中的柱子存在不良的稳定性故障，这些问题在当前的钢设计标准中没有得到适当解决，需要进一步调查。为了确保钢框架在未来地震事件下的可预测和安全响应，需要适当考虑可能的柱稳定性故障的设计策略，同时将施工成本降至最低。该研究项目旨在为钢支撑框架和抗弯框架柱制定有效的抗震稳定性要求。这将通过全面的全尺寸塔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提出设计建议，并改进设计工具，供结构工程师在日常实践中使用。