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Seismic retrofit of spherical liquid storage tanks with energy dissipative devices

机译：球形消能装置的球形储罐的抗震改造

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摘要

Numerical studies on the seismic behavior of a typical spherical liquid storage tank, equipped with conventional braces or retrofitted with passive energy dissipation devices, are presented. Three energy dissipation systems, in the form of diagonal braces, are investigated: non-linear viscous dampers and buckling-restrained and friction struts. All numerical analyses are performed by means of a detailed finite element model, considering the exact geometry of the elevated steel tank structure, the fluid-structure interaction effects for an arbitrary level of fluid filling, as well as the non-linearities introduced by the various bracing systems. Representative results for base shear forces, vertical displacements of the fluid content due to sloshing and displacements at characteristic locations of the retrofitted spherical tank are presented. The benefits introduced by each of the dissipative bracing systems used in this study are identified and discussed in comparison to the dynamic characteristics and the seismic response of the original spherical tank, fitted with a conventional bracing system.
机译：给出了一个典型的球形液体储罐抗震性能的数值研究，该储罐配备了传统的支撑装置或加装了无源消能装置。研究了三种以斜撑形式的能量耗散系统：非线性粘性阻尼器和屈曲约束和摩擦撑杆。所有数值分析都是通过详细的有限元模型进行的，其中考虑了高架钢罐结构的确切几何形状，任意水平的流体填充的流固耦合效应以及各种引入的非线性支撑系统。给出了基本剪力，由于晃动引起的流体含量的垂直位移以及在加装的球形储罐特征位置处的位移的代表性结果。通过与装有传统支撑系统的原始球形储罐的动力特性和地震响应进行比较，确定并讨论了本研究中使用的每种耗散支撑系统所带来的好处。

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