Difficulty in maintaining tuning due to water depth fluctuation makes overhead water tanks (OWTs) ineffective as tuned liquid or mass dampers. Recently, a semi-active damper involving OWT, that varies the stiffness of the tank-supporting columns with liquid depth variation to maintain the impulsive frequency of the tank constant at a value required for tuning, has been proposed. In this paper, the concept is extended to develop a passive tuned damper involving the OWT (PTD-OWT), which is more reliable, cost-effective, and has a simpler configuration than its semi-active counterpart but achieves the same objective as the latter. For the PTD-OWT, a novel mechanism involving a spring-supported platform, a rigid frame, and tank-supporting columns is developed. The working principle and mathematical model of the PTD-OWT are presented followed by an illustrative design example considering the host building undergoing base excitation. The results revealed that the PTD-OWT remains tuned and thereby performs consistently despite wide variations in water depth in the tank. Significant reductions have been achieved by the PTD-OWT in peak and root-mean-square displacement and acceleration responses of the structure for a variation in liquid depth between 100% full tank to empty tank condition, with the maximum fall in control achieved as only 6.8%. A comparison of PTD-OWT is made with the case when the tank is designed as a conventional passive tuned mass damper (TMD) without the provision for maintaining tuning. The conventional mass damper suffers significant performance degradation as liquid depth fluctuates in the tank.

由于水深波动而难以维持调谐，使得高架水箱（OWT）作为调谐液体或质量阻尼器无效。最近，有人提出了一种涉及OWT的半主动阻尼器，它随着液体深度的变化而改变罐支撑柱的刚度，以将罐的脉冲频率保持在调谐所需的值恒定。在本文中，该概念被扩展以开发一种涉及 OWT (PTD-OWT) 的被动调谐阻尼器，它比半主动阻尼器更可靠、更具成本效益，并且配置更简单，但实现了与半主动阻尼器相同的目标。后者。对于 PTD-OWT，开发了一种新颖的机构，包括弹簧支撑平台、刚性框架和坦克支撑柱。介绍了 PTD-OWT 的工作原理和数学模型，随后给出了考虑主体建筑受到基础激励的说明性设计示例。结果表明，尽管水箱内的水深变化很大，PTD-OWT 仍然保持调谐，因此性能始终如一。 PTD-OWT 显着降低了 100% 满箱到空箱条件下液体深度变化时结构的峰值和均方根位移以及加速度响应，并且仅实现了最大控制下降6.8%。将 PTD-OWT 与油箱设计为传统被动调谐质量阻尼器 (TMD) 且不提供维持调谐的情况进行比较。当罐中液体深度波动时，传统质量阻尼器的性能会显着下降。