基于复合隔震控制系统的大型展品地震响应控制研究

作者：李德超¹,吉峰²,田坤²,刘怀斌¹

作者简介：

李德超，高级工程师，E-mail:187179387@ qq. com

作者单位：

1.四川省建筑科学研究院有限公司，四川成都 610081; 2.上海市建筑科学研究院有限公司上海市工程结构安全重点实验室，上海 200032

基金项目：

∗上海市住房和城乡建设管理委员会 2024 年度科研项目（沪建科 2024-002-007）

摘要：

隔震技术可有效控制结构在地震作用下的动力响应，在实际工程中得到了大量推广应用，但目前针对隔震技术的研究与应用多集中于整体建筑结构中，在大型展品中的应用较少。针对户外展出的大型展品，采用复合隔震控制系统对其进行隔震设计，控制结构在地震作用下的动力响应。通过有限元分析软件分别建立设有复合隔震控制系统的隔震结构（ISO 结构）模型和常规固定安装的非隔震结构（FIX 结构）模型，通过非线性时程分析对 2 个模型动力响应特性进行对比研究。研究结果表明，采用复合隔震控制系统后展品主杆顶部与底部相对水平位移在PGA= 0.035g,0.220g 工况下相对于 FIX 结构最大减小幅度分别为 55.2%,76.7%,主杆顶部水平加速度峰值最大减小幅度分别为 45.0%,77.1%,底座节点竖向力最大减小幅度分别为 72.8%,82.3%.采用复合隔震控制系统可有效减小结构动力响应，减小幅度在输入地震动峰值加速度较大的工况下更明显，结构整体稳定性得到提升。

关键词：大型展品；阻尼器；隔震；地震响应；数值模拟

English：

Seismic isolation technology can effectively control the dynamic response of structures underearthquake, and has been widely applied in practical engineering. But at present, the research andapplication of seismic isolation technology are mostly concentrated in the whole building structure, andthe application in large-scale exhibits is less. For large-scale outdoor exhibits, a composite isolationcontrol system is used to isolate them and control the dynamic response of the structure under earthquakeaction. An isolated structure model with composite isolation control system and a non-isolated structuremodel with conventional fixed installation were established by finite element analysis software, and thedynamic response characteristics of the two models were compared by nonlinear time history analysis. Theresearch results show that the maximum reduction of the relative horizontal displacement of the top andbottom of the main pole of the exhibits under the condition of PGA = 0.035g and PGA = 0.220g relative tothe FIX structure is 55.2% and 76.7% respectively,the maximum reduction of the horizontal accelerationpeak at the top of the main pole is 45.0% and 77.1% respectively, and the maximum reduction of thevertical force of the base node is 72.8% and 82.3% respectively. The adoption of a composite isolationcontrol system can effectively reduce the dynamic response of the structure. The reduction in amplitude isparticularly significant under conditions with a larger peak acceleration, and the overall structural stabilityis significantly enhanced.

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工程抗震与加固改造 > 2026年 第卷 第03期