Passive and Active Control of Structural Stability: (Research Initiation)

本研究解决了结构的稳定性或安全性问题，这是最重要的设计考虑因素之一，特别是对于那些容易受到大风或地震激励的结构。一个主要的稳定因素是由倾覆力矩产生的P-效应，这取决于楼板重力载荷和楼板旋转。解决这个问题的一种可能的方法是利用结构控制的概念来防止由外部激励引起的不需要的、过度的P应力。本研究旨在探讨这种稳定控制概念的可行性，并为控制系统建立理论基础。被动和主动控制系统，包括质量阻尼系统和肌腱系统将被研究。状态向量方法将用于提供分析的数学框架，该框架将结合使用塑性铰理想化的P效应处理和允许结构构件高应力区域屈服逐渐发展的模型。本研究将有助于工程设施安全施工中控制系统的实际实施。这是由工程局支持的妇女研究机会项目下的一项研究启动拨款。

This research addresses the problem of stability or safety of structures which is one of the most important design considerations, particularly for those which are vulnerable to high winds or earthquake excitations. One primary stability factor is the P- effect produced by an overturning moment dependent on the floor gravity load and the floor rotation. One possible approach to this problem is to make use of the concept of structural control in preventing undesirable, excessive P- stresses induced by external excitations. The research aims at investigating the feasibility of such a stability control concept and establishing a theoretical base for control systems. Both passive and active control systems, including mass damper systems and tendon systems will be studied. A state vector approach will be used to provide the mathematical framework of the analysis which will incorporate the treatment of P- effects using a plastic hinge idealization and a model which allows for a gradual development of yielding in highly stressed regions of structural members. This study will contribute to the practical implementation of control systems in the safe construction of the engineering facility. This is a research initiation grant under the Research Opportunity for Women program supported by the Engineering Directorate.