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Study on Modern Energy Absorption Systems in Structures Subjected to Earthquake Forces
Iranian Journal of Science and Technology, Transactions of Civil Engineering ( IF 1.7 ) Pub Date : 2021-06-08 , DOI: 10.1007/s40996-021-00677-w
Armin Beheshti Marnani , Seyed Alireza Zareei , Mohammad Ali Rahgozar , Amir Behravan

In light of the vast potential for the application of modern energy absorption systems in the structures, the effectiveness of each system should be tested, analyzed, and proved before convincing the structures design companies to use them. In this research, the effectiveness of applying base isolators, viscous and friction dampers and a hybrid system consisted of lead rubber bearing with friction dampers are studied. To quantify the impact of each system, a control structure without any energy absorption system is considered. Base isolators and damper systems are designed according to available international codes. American concrete institute’s codes were used to design the concrete structure frames. All of the considered systems therewith hybrid systems including lead rubber base isolation and viscous dampers have been modeled in ETABS 2018 software. The control structure has an intermediate moment resisting frame with high importance located in a high seismic hazard zone. These models were subjected to time history analysis by using Manjil, Loma prieta, and Imperial Valley Earthquakes records. It was observed that the structural design parameters such as base shears and story drifts were significantly reduced by 76–86% and 44–92%, respectively, compared to the structure without any energy absorption system. Also, the total energy dissipated in the structures equipped with modern energy absorption systems was decreased between 32 and 86% compared to the friction dampers. It should be noted that the studied devices may be used either for the design of a new structure or seismic rehabilitation of the existing structures.



中文翻译:

地震作用下结构的现代能量吸收系统研究

鉴于现代吸能系统在结构中应用的巨大潜力,在说服结构设计公司使用它们之前,应测试、分析和证明每个系统的有效性。在这项研究中,研究了应用基础隔振器、粘性和摩擦阻尼器以及由带摩擦阻尼器的铅橡胶轴承组成的混合系统的有效性。为了量化每个系统的影响,我们考虑了一个没有任何能量吸收系统的控制结构。基础隔振器和阻尼器系统是根据可用的国际规范设计的。混凝土结构框架的设计采用美国混凝土协会的规范。所有考虑的系统及其混合系统,包括铅橡胶底座隔离和粘性阻尼器都已在 ETABS 2018 软件中建模。控制结构具有位于高地震危险区的具有高度重要性的中间抗力矩框架。通过使用 Manjil、Loma prieta 和 Imperial Valley Earthquakes 记录对这些模型进行时间历史分析。据观察,与没有任何能量吸收系统的结构相比,基础剪力和楼层漂移等结构设计参数分别显着降低了 76-86% 和 44-92%。此外,与摩擦阻尼器相比,配备现代能量吸收系统的结构中耗散的总能量减少了 32% 到 86%。

更新日期:2021-06-08
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