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配备粘弹性摩擦阻尼器的钢框架支撑结构的先进抗震性能。

Advanced seismic resilient performance of steel MRF equipped with viscoelastic friction dampers.

作者信息

Bae Jaehoon, Huang Xiameng, Zhang Ziwen

机构信息

Department of Architectural Design, Chonnam National University, 50 Daehak-Ro, Yeosu-Si, Jeonnam, 59626, Republic of Korea.

School of Intelligent Transportation and Engineering, Guangzhou Maritime University, 101 Hongshansan Road, Huangpu District, Guangzhou, 510000, China.

出版信息

Sci Rep. 2024 Aug 21;14(1):19403. doi: 10.1038/s41598-024-70280-2.

DOI:10.1038/s41598-024-70280-2
PMID:39169202
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11339266/
Abstract

This paper demonstrates the enhanced resilience performance of steel structures with viscoelastic friction dampers (VEFDs) based on numerical simulations of building responses. Velocity-dependent dampers, which are widely used to increase seismic resilience, may increase the axial force of the column under strong earthquake conditions because the generated force depends on the interstory velocity. This often leads to plastic hinges being placed on the columns of the structure, which can lead to structural collapse via weak-layer failure. In addition, while viscoelastic dampers are effective in reducing story drift, peak acceleration, and peak velocity, the proposed hybrid VEFD offers the additional benefit of reducing base shear via the friction damper. Simulation results for 10- and 20-story buildings with the novel VEFDs show that the proposed dampers can control drift and plastic deformation in structural members. Nonlinear dynamic analysis of 20 far-fault seismic ground motion records conducted using OpenSees also reveals lower peak absolute floor acceleration and velocity. Overall, the results suggest that the proposed VEFD has excellent potential for use in the performance-based seismic design of structures because it can reduce both structural and nonstructural damage. The results verify the damper's effectiveness in controlling story drift without a significant increase in the base shear. Collapse probability assessment also demonstrates the collapse resistance of moment-resisting frames when used in conjunction with VEFDs.

摘要

本文基于建筑响应的数值模拟，展示了粘弹性摩擦阻尼器（VEFD）增强钢结构的抗震性能。广泛用于提高抗震能力的速度依赖型阻尼器，在强震条件下可能会增加柱的轴向力，因为产生的力取决于层间速度。这通常会导致结构柱上出现塑性铰，进而可能通过薄弱层破坏导致结构倒塌。此外，虽然粘弹性阻尼器在减少层间位移、峰值加速度和峰值速度方面有效，但所提出的混合VEFD通过摩擦阻尼器还具有减少基底剪力的额外优势。采用新型VEFD的10层和20层建筑的模拟结果表明，所提出的阻尼器可以控制结构构件中的位移和塑性变形。使用OpenSees对20条远场地震地面运动记录进行的非线性动力分析还显示，峰值绝对楼层加速度和速度较低。总体而言，结果表明所提出的VEFD在基于性能的结构抗震设计中具有出色的应用潜力，因为它可以减少结构和非结构损伤。结果验证了该阻尼器在控制层间位移而不显著增加基底剪力方面的有效性。倒塌概率评估也表明了抗弯框架与VEFD一起使用时的抗倒塌能力。

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本文引用的文献

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Materials (Basel). 2020 Sep 4;13(18):3920. doi: 10.3390/ma13183920.