【摘要】 为提升强震作用下基础隔震储液罐结构的减震性能，提出了一种基于负刚度放大阻尼器的组合隔震方法，并基于拓展定点理论推导了负刚度放大阻尼器的优化设计方法。通过建立考虑前三阶晃动模态的储液罐简化质点模型并进行数值模拟，研究了增设不同阻尼器的隔震储液罐的地震响应，对比分析了该方法与传统方法在常规短周期和极端长周期地震动下的减震性能。结果表明：相较于传统方法，该方法可在短周期地震动下更有效地综合控制储液罐的晃动波高、底部剪力和倾覆弯矩，效果分别提升45%、16%、43%。在长周期地震动下，该方法亦能有效提升对基底位移、晃动波高、底部剪力和倾覆弯矩的控制，效果分别提升10%、37%、31%、37%。更多还原

【Abstract】 To improve seismic performances of base-isolated liquid storage tanks under strong seismic-induced ground motions, a combined isolation method based on negative stiffness amplifying damper was proposed, and the analytical optimal formulas of negative stiffness amplifying damper based on the extended fixed-point theory were derived. By establishing a simplified lumped mass model of liquid storage tank with the first three sloshing modes, seismic responses of differently controlled liquid storage tanks under conventional short-period and extreme long-period ground motions were obtained numerically, and performances of the proposed method and traditional method were compared. The results showed that compared with the traditional method, the proposed method is more effective in suppressing sloshing wave height, bottom shear force, and overturning moment of liquid storage tank under short-period ground motions, with improvements of 45%, 16%, and 43%, respectively. When subject to long-period ground motions, the proposed method is also more effective than the traditional method in suppressing base displacement, sloshing wave height, bottom shear force, and overturning moment, with improvements of 10%, 37%, 31%, and 37%, respectively.更多还原