设置接触式加劲肋的剪切连接耗能器滞回性能试验研究
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(河海大学土木与交通学院,江苏 南京210098 )

作者简介:

李宗京(1987—),男,副教授,博士,主要从事钢结构及结构减震研究。E-mail:lizongjing@hhu.edu.cn

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中图分类号:

TU352.1

基金项目:

国家自然科学基金项目(52208163);中央高校基本科研业务费专项资金项目(B230201035)


Experimental study on hysteretic performance of shear link dampers with contact-type stiffeners
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(College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China )

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    摘要:

    针对剪切连接耗能器腹板上焊接的加劲肋焊缝处存在较高的焊接残余应力,在反复荷载作用下容易产生疲劳破坏的问题,设计了一种设置接触式加劲肋的剪切连接耗能器,并通过往复加载试验验证了其滞回性能。试验结果表明:无加劲肋的剪切连接耗能器过早发生腹板面外屈曲,设置传统焊接式加劲肋的剪切连接耗能器过早发生腹板开裂,低周疲劳性能和耗能能力均受到较大影响,而设置接触式加劲肋的剪切连接耗能器能够较好抑制腹板面外屈曲并避免加劲肋焊缝引起的残余应力,从而有效延缓腹板裂纹的产生和扩展,使低周疲劳性能和耗能能力得到明显改善。

    Abstract:

    Due to high residual stress at the stiffener welds on the web, shear link dampers (SLDs) are prone to fatigue damage under cyclic loading. Therefore, a new SLD with contact-type stiffeners was designed, and cyclic loading experiments were conducted to verify its hysteretic performance. The results indicate that the web shows premature out-of-plane buckling for the SLD without stiffeners, and cracks initiate early for the SLD with conventional welded stiffeners, which are detrimental to the low-cycle fatigue performance and energy dissipation capacity. In contrast, for the SLD with contact-type stiffeners, out-of-plane buckling of the web can be effectively suppressed, and residual stresse in the web caused by stiffener welds can be avoided. Consequently, the initiation and propagation of web cracks can be delayed, which significantly improves the low-cycle fatigue performance and energy dissipation capacity of the SLD.

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李宗京,杨炬龙,张寅超.设置接触式加劲肋的剪切连接耗能器滞回性能试验研究[J].河海大学学报(自然科学版),2025,53(6):132-137.(LI Zongjing, YANG Julong, ZHANG Yinchao. Experimental study on hysteretic performance of shear link dampers with contact-type stiffeners[J]. Journal of Hohai University (Natural Sciences),2025,53(6):132-137.(in Chinese))

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  • 收稿日期:2024-09-14
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  • 在线发布日期: 2025-12-09
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