Liquid storage tanks are widely used in the industry and can contain not only harmless substances but also various ones that can be explosive and toxic or pollutant, thus implying that both the structure and the content must remain safe and operational under different types of loading. The same applies to any tank-connected plant system/item. Yet, past earthquakes repeatedly demonstrated that even if structural damage is prevented in the shell, severe occurrences may still be observed due to sloshing phenomena, which drive the tank-fluid system response with high impacts in case of accidental release of chemicals. Therefore, this paper studies an energy dissipation system consisting of floating roof and external dampers that are utilized to control liquid vibration by augmenting the level of damping. In order to evaluate its effectiveness at the design-level earthquakes, a series of explicit nonlinear dynamic analyses have been performed, and comparisons are provided between floating roofed steel cylindrical tanks equipped with supplemental devices and counterparts without them. Changes in seismic performance because of geometrical variations in the tank (i.e. aspect ratio) and seismic input (i.e. far and near field earthquakes) have been quantified by means of experimentally validated numerical models that account for material and geometrical nonlinearities, as well as for fluid-structure interaction in an explicit manner. Shake-table tests available in the literature have been simulated, and the proposed modelling criteria show a good fit with experimental data on two tank specimens. Analysis data sets involving three tank geometries reveal that even if the dissipation system targets mainly large-capacity tanks, it can be effectively used to enhance the performance of any system, reducing the sloshing wave height which can be excessive especially when the tank is subjected to severe near field ground motions.

液体储罐在工业中得到广泛使用，不仅可以包含无害物质，而且还可以包含各种易爆，有毒或污染物的物质，这意味着结构和内容必须在不同负载类型下都保持安全和可操作。对于任何与罐连接的工厂系统/项目，同样适用。然而，过去的地震反复表明，即使防止了壳体的结构损坏，由于晃荡现象仍可能会观察到严重的情况，在意外释放化学物质的情况下，这会极大地推动储罐-流体系统的响应。因此，本文研究了一种由浮顶和外部阻尼器组成的能量消散系统，该系统通过增加阻尼水平来控制液体振动。为了评估其在设计级地震中的有效性，已进行了一系列显式的非线性动力分析，并比较了配备有辅助装置的浮顶钢制圆筒形储罐和不带辅助装置的对空圆筒形储罐。由于储罐的几何变化（即长宽比）和地震输入（即远场和近场地震）而引起的地震性能变化已通过实验验证的数值模型进行了量化，该模型考虑了材料和几何非线性以及流体的非线性-结构相互作用的显式方式。已经对文献中可用的振动台测试进行了模拟，并且所提出的建模标准表明与两个储罐样本的实验数据非常吻合。