Annular Tuned Liquid Dampers for Elevated Tanks

用于高位储罐的环形调谐液体阻尼器

• 批准号: 429644-2012
• 负责人: Kianoush, Reza
• 金额: $ 1.82万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=510919
• 关键词: Annular; Tuned; Liquid; Dampers; Elevated

Elevated water storage tanks are extensively used in water supply facilities. These tanks are exposed to a wide range of seismic hazards and interaction with other sectors of built environment. Very few investigations have been carried out on the seismic resistance of elevated tanks. Earthquake damages to the tanks can cause unwanted events such as shortage of drinking and utilizing water and uncontrolled fires.Due to these reasons, this type of structure which is special in construction and in function from engineering point of view must be constructed to be resistant against earthquakes. In this project, the efficiency of an annular tuned liquid damper (ATLD) will be investigated in order to strengthen the elevated tanks against seismic loads. A tuned liquid damper (TLD) is a partially filled, water tank used as a vibration absorber in order to decrease the dynamic motion of a structure. The vibration of the structure under an external dynamic load causes sloshing motion of the liquid inside the TLD. By tuning the natural frequency of the sloshing motion to the natural frequency of the structure, the liquid motion imparts inertia forces approximately anti-phase to the external dynamic force, thereby reducing structural motion. The use of TLDs has increased due to their many advantages over other conventional damping devices. They are easy to install on existing structures, and need low maintenance and low operating costs. The proposed annular TLD can be easily installed in an elevated tank shaft without disturbing other mechanical devices or limiting the access to the reservoir. Although the construction of a TLD is simple, the liquid sloshing motion inside the TLD is characterized by a highly non-linear and complex nature. Due to the complex dynamic behavior of liquid-structure interaction and sloshing waves, the accurate prediction of their behavior is highly desired. The focus of this study is to investigate the behaviour of ATLDs for the application in elevated tanks using an advanced numerical program.

高架储水罐广泛应用于供水设施中。 这些储罐暴露在广泛的地震危险中，并与建筑环境的其他部分相互作用。很少有研究已经进行了抗震高架罐。 地震对储罐的破坏会导致不必要的事件，如饮用水和用水短缺以及失控的火灾。由于这些原因，从工程角度来看，这种结构在结构和功能上都是特殊的，因此必须建造抗震结构。在这个项目中，环形调谐液体阻尼器（ATLD）的效率将被调查，以加强对地震荷载的高架储罐。 调谐液体阻尼器（tuned liquid damper，缩写为TLD）是一种部分填充的水箱，用作减振器，以减少结构的动态运动。结构在外部动载荷作用下的振动引起了容器内液体的晃动。通过将晃动运动的固有频率调谐到结构的固有频率，液体运动施加与外部动态力大致反相的惯性力，从而减少结构运动。TLD的使用已经增加，这是由于TLD比其他常规阻尼装置具有许多优点。它们易于安装在现有结构上，并且需要低维护和低运营成本。所提出的环形管道可以很容易地安装在升高的罐轴中，而不会干扰其他机械装置或限制对储存器的访问。虽然液体晃动器的结构简单，但液体晃动器内部的液体晃动运动具有高度非线性和复杂的性质。由于液体-结构相互作用和晃动波的复杂动力学行为，其行为的准确预测是非常必要的。本研究的重点是调查的行为ATLD的应用在高架坦克使用先进的数值计算程序。