钢框架中可更换橡胶抗弯耗能阻尼器减震性能分析

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (7) : 159-166.

论文

舒展1， 董翰林2，石文龙1，GREGORY MacRae3，宁波1，甘兆焯2

作者信息 +

Aseismic performance of replaceable moment-resisting elastomeric dampers for steel frames

SHU Zhan1, DONG Hanlin2, SHI Wenlong1, GREGORY MacRae3, NING Bo1, GAN Zhaozhuo2

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文章历史 +

摘要

本文为钢框架结构提出一种可更换橡胶抗弯阻尼器，装配于钢梁的端部，不额外占用建筑空间。阻尼器包括橡胶段与保险丝段两部分，可在地震过程中提供分段自适应的被动耗能。本文首先阐明了此类阻尼器的作用机理，并对其提供了简要的抗震设计方法。并介绍了橡胶材料及橡胶段的动力试验。随后，本文对一典型钢框架结构进行算例分析，比较使用与未使用阻尼器两种情况下结构的地震响应。计算结果表明，橡胶抗弯可更换耗能阻尼器可为钢框架结构提供有效系统阻尼，通过将耗能与破坏聚集于阻尼器的不同部位，使结构中其他构件基本维持在弹性阶段，从而有效降低或消除结构残余位移；同时，阻尼器中的保险丝段为可更换构件，可显著提高整体结构的抗震性能与震后可恢复性能。

Abstract

An innovative type of replaceable moment-resisting elastomeric damper (RMED) is proposed for the steel moment frame systems. The proposed dampers are installed at the two ends of the steel beams, occupying no additional architectural space. A typical RMED consists of a elastomeric segment and a fuse segment, which could provide adaptive passive energy dissipating capacity to the structure. The paper first illustrates the mechanism and the seismic design principle for the RMEDs. Then, the dynamic tests to evaluate the performance of the rubber material and the elastomeric segment of the damper were highlighted. Subsequently, the paper provides a case study based on a prototype steel moment frame structure. The earthquake responses of the structure with and without RMEDs are carefully simulated and compared. The results show that the RMEDs provide the steel moment frames with effective damping. The energy dissipation and the damages of the whole building are all gathered at the RMED. This secures the elastic performance of all the other structural elements during the earthquake events, so that the residual displacement of the structure can be effectively reduced or eliminated.. Furthermore, the fuse segment of the damper is a replaceable component, which can significantly improve the seismic performance and post-earthquake recovery performance of the whole structure.

导出引用

舒展1， 董翰林2，石文龙1，GREGORY MacRae3，宁波1，甘兆焯2. 钢框架中可更换橡胶抗弯耗能阻尼器减震性能分析[J]. 振动与冲击, 2022, 41(7): 159-166

SHU Zhan1, DONG Hanlin2, SHI Wenlong1, GREGORY MacRae3, NING Bo1, GAN Zhaozhuo2. Aseismic performance of replaceable moment-resisting elastomeric dampers for steel frames[J]. Journal of Vibration and Shock, 2022, 41(7): 159-166

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