In this study, a toroidal tuned liquid column damper (TTLCD), which is composed of outer shell, inner shell, and L‐shaped baffles, is creatively proposed to control multidirectional vibration of structures. With a toroidal shape, the proposed TTLCD can act as several equivalent TLCDs in arbitrary directions due to its axial symmetry. First, the configuration of the TTLCD is illustrated in detail. Second, the equations of motion are developed for the TTLCD based on the Lagrange dynamic equations, and thus the natural frequency may be directly calculated based on the effective length. Finally, shaking table tests are performed for a single‐degree‐of‐freedom (single‐DOF) shear frame and a three‐DOF frame in different excitation directions with the proposed TTLCD and conventional TLCD, respectively. The test results indicate that the proposed TTLCD may effectively dampen the vibration in any given direction and simultaneously suppress multidirectional vibration of multiple‐DOF structure, whereas the control efficiency of conventional TLCD shows clear difference in its main control direction and other directions.

中文翻译：

---

环形调谐液柱阻尼器，用于多向地面运动引起的振动控制

在这项研究中，创造性地提出了一种由外壳，内壳和L形挡板组成的环形调谐液柱阻尼器（TTLCD），以控制结构的多向振动。拟定的TTLCD具有环形形状，由于其轴向对称性，可以在任意方向上充当多个等效的TLCD。首先，详细说明TTLCD的配置。其次，基于拉格朗日动力学方程为TTLCD建立运动方程，因此可以根据有效长度直接计算固有频率。最后，分别使用建议的TTLCD和传统的TLCD对单自由度（单DOF）剪切框架和三自由度框架在不同激励方向上进行振动台测试。