开发一种具有垂直负硬度 (PC-VNS) 的新型摆形柱底部隔离系统,用于地震应用的堆状行为
Abdallah Azizi1, Majid Barghian2
1University of Tabriz, Tabriz, Iran.
Scientific reports
|December 28, 2025
概括
一个新的地震基隔离器,垂直负硬度的摆柱 (PC-VNS),在弱土壤中提供了增强的抗地震能力. 该系统减少了结构的移位和加速,改善了地震隔离和基础稳定性.
科学领域:
- 土木工程 土木工程是指土木工程.
- 地震工程的工程是地震工程.
- 结构动力学 结构动力学
背景情况:
- 地震基地的隔离对于保护地震易发生地区的结构至关重要.
- 软弱的土壤条件对传统的基础和地震隔离系统构成重大挑战.
- 延长结构的自然寿命是减轻地震危险的关键策略.
研究的目的:
- 引入和评估一种新的地震基隔离器:垂直负硬度 (PC-VNS) 的摆形柱.
- 通过修改结构基础连接来评估PC-VNS系统在弱土壤中的有效性.
- 调查系统减少地震反应 (位移和加速) 和输入能量的能力.
主要方法:
- 使用MATLAB开发和验证理论框架.
- 在ABAQUS.中进行的有限元素建模 (FEM).
- 对多个地震记录的分析和对地震场景的模拟.
主要成果:
- 该PC-VNS系统表现出接近零的度 (QZS) 特性,有效地延长了自然周期.
- PC-VNS系统的非线性行为显著降低了位移和加速,减轻了5%.
- 该系统避免了共振现象,并且与固定基架相比,输入能量显著减少.
- 性能对最大允许的运动范围敏感,在较小的位移限制下获得最佳结果.
结论:
- 该PC-VNS系统提供有效的地震隔离和基础加强,特别是在弱土壤中.
- 它的堆状行为增强了土壤结构的相互作用,改善了整体的地震性能.
- PC-VNS系统为抗地震结构设计提供了一个有前途的进步.
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