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

这项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， 对于那些容易受到大风或地震激励的地方。 一个主要的稳定性因素是由一个 倾覆力矩取决于楼板重力荷载和楼板 旋转 解决这个问题的一个可能的方法是利用 结构控制的概念，以防止不必要的，过度的P- 由外部激励引起的应力。 本研究的目的是探讨这种稳定性的可行性 控制概念，为控制系统的研究奠定理论基础。 被动和主动控制系统，包括质量阻尼器系统 和钢筋束系统进行研究。 状态向量方法将是 用于提供分析的数学框架， 使用塑料铰链纳入P效应的处理 理想化和一个模型，允许逐步发展， 在结构构件的高应力区域屈服。 本研究将有助于控制的实际实施 工程设施安全施工中的系统。 这是研究机会下的研究启动补助金， 工程局支持的妇女方案。

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.