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Evaluating the influences of connection forms on the cyclic performance of RSFBs
Soil Dynamics and Earthquake Engineering ( IF 4 ) Pub Date : 2021-01-22 , DOI: 10.1016/j.soildyn.2021.106598
Qing Jiang , Hanqin Wang , Yulong Feng , Xun Chong

A rocking steel frame with buckling-restrained braces (RSFB) with excellent deformation controlling and energy dissipating capacities is proposed to retrofit conventional steel frames. Notably, previous studies have shown that the seismic performance of structures with buckling-restrained braces (BRBs) was influenced by the connection forms of the BRBs within the structures. In this study, a series of pseudostatic tests were conducted on the RSFBs to investigate the influence of the BRB and support connection forms on the structural seismic performance. An out-of-plane deformation is observed in the transiting portion of the compressional BRB because of the failure of the out-of-plane restraints. However, the BRB on the tensional side works normally, and the RSFBs do not fully lose their carrying capacity. The rocking steel frames in all test specimens remain elastic and demonstrate uniform inter-story drifts. Finite element models of the test specimens with full out-of-plane restraints were established and simulated using ABAQUS software to complement the tests. The simulation results show that the BRB and support connection forms have little influence on the overall structural hysteresis response. However, the BRB connection forms affect the deformation of the BRB core plate and the out-of-plane deformation at the BRB ends due to different out-of-plane stiffnesses. Moreover, the supports with various connection forms exhibit different damage degrees and distributions.



中文翻译:

评估连接形式对RSFB循环性能的影响

提出了一种具有屈曲约束支撑(RSFB)的摇摆钢架,该钢架具有出色的变形控制和消能能力,以改造传统钢架。值得注意的是,先前的研究表明,带有屈曲约束支撑(BRB)的结构的抗震性能受结构内BRB的连接形式的影响。在这项研究中,对RSFB进行了一系列的拟静力试验,以研究BRB和支撑连接形式对结构抗震性能的影响。由于平面外约束的失效,在压缩BRB的过渡部分中观察到了平面外变形。但是,张紧侧的BRB正常工作,并且RSFB并没有完全失去其承载能力。所有测试样品中的摇摆钢框架都保持弹性,并表现出均匀的层间漂移。建立了具有完全平面外约束的试样的有限元模型,并使用ABAQUS软件进行了模拟,以补充试验。仿真结果表明,BRB和支座连接形式对整体结构滞后响应影响很小。但是,由于不同的平面外刚度,BRB连接形式会影响BRB芯板的变形以及BRB端部的平面外变形。此外,具有各种连接形式的支撑件表现出不同的损坏程度和分布。建立了具有完全平面外约束的试样的有限元模型,并使用ABAQUS软件进行了模拟,以补充试验。仿真结果表明,BRB和支座连接形式对整体结构滞后响应影响很小。但是,由于不同的平面外刚度,BRB连接形式会影响BRB芯板的变形以及BRB端部的平面外变形。此外,具有各种连接形式的支撑件表现出不同的损坏程度和分布。建立了具有完全平面外约束的试样的有限元模型,并使用ABAQUS软件进行了模拟,以补充试验。仿真结果表明,BRB和支座连接形式对整体结构滞后响应影响很小。但是,由于不同的平面外刚度,BRB连接形式会影响BRB芯板的变形以及BRB端部的平面外变形。此外,具有各种连接形式的支撑件表现出不同的损坏程度和分布。由于不同的平面外刚度,BRB连接形式会影响BRB芯板的变形以及BRB端部的平面外变形。此外,具有各种连接形式的支撑件表现出不同的损坏程度和分布。由于不同的平面外刚度,BRB连接形式会影响BRB芯板的变形以及BRB端部的平面外变形。此外,具有各种连接形式的支撑件表现出不同的损坏程度和分布。

更新日期:2021-01-22
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