白久林, 冯明富, 李文学, 陈辉明, 刘明辉, 金双双. 防屈曲支撑-RC框架新型开孔钢板剪力键连接节点抗震性能研究[J]. 工程力学, 2022, 39(6): 110-121. DOI: 10.6052/j.issn.1000-4750.2021.03.0206
引用本文: 白久林, 冯明富, 李文学, 陈辉明, 刘明辉, 金双双. 防屈曲支撑-RC框架新型开孔钢板剪力键连接节点抗震性能研究[J]. 工程力学, 2022, 39(6): 110-121. DOI: 10.6052/j.issn.1000-4750.2021.03.0206
BAI Jiu-lin, FENG Ming-fu, LI Wen-xue, CHEN Hui-ming, LIU Ming-hui, JIN Shuang-shuang. THE SEISMIC PERFORMANCE OF A NEW PBL-TYPE CONNECTION IN BUCKLING-RESTRAINED BRACED REINFORCED CONCRETE FRAMES[J]. Engineering Mechanics, 2022, 39(6): 110-121. DOI: 10.6052/j.issn.1000-4750.2021.03.0206
Citation: BAI Jiu-lin, FENG Ming-fu, LI Wen-xue, CHEN Hui-ming, LIU Ming-hui, JIN Shuang-shuang. THE SEISMIC PERFORMANCE OF A NEW PBL-TYPE CONNECTION IN BUCKLING-RESTRAINED BRACED REINFORCED CONCRETE FRAMES[J]. Engineering Mechanics, 2022, 39(6): 110-121. DOI: 10.6052/j.issn.1000-4750.2021.03.0206

防屈曲支撑-RC框架新型开孔钢板剪力键连接节点抗震性能研究

THE SEISMIC PERFORMANCE OF A NEW PBL-TYPE CONNECTION IN BUCKLING-RESTRAINED BRACED REINFORCED CONCRETE FRAMES

  • 摘要: 防屈曲支撑(BRB)作为一种优良的耗能构件,广泛应用于工程结构。在钢筋混凝土(RC)框架结构中布置防屈曲支撑时,支撑与梁柱节点的连接往往是结构抗震设计的重点和难点。传统的连接方式为节点板与梁柱混凝土中的预埋件焊接,再与BRB直接相连。然而,框架作用产生的开合效应和地震动引起的往复荷载容易使焊缝疲劳撕裂,从而导致节点连接破坏。为此,该文提出了开孔钢板剪力键(PBL)整体式连接节点,并将其应用于BRB-RC框架结构中。基于泛应力法,给出了节点板和PBL的设计方法。以此为基础,开展了BRB-RC框架结构的节点设计,进行了节点的有限元模拟和试验分析。研究结果表明:BRB与RC梁柱的连接节点承载力强,塑性铰转移到节点板边缘以实现损伤可控,BRB的承载-耗能性能得到了充分发挥;该新型节点连接形式安全、可靠,可显著提升结构的抗震性能。

     

    Abstract: Buckling-restrained braces (BRBs) are excellent energy-dissipating members, which are widely used in engineering structures. When BRBs are added to reinforced concrete (RC) frame structures, the connection between the beam and column joints and the BRBs usually becomes a key and difficult issue in the design. The conventional joint connection adopts welds between the gusset plate and the steel embedded parts of the concrete beams and columns, and then connects the BRB through the gusset plate. However, the opening and closing effect of the frame and the cycle loading caused by earthquakes may make the welds and joints susceptive to premature fracture. Therefore, this paper proposed a perfobond strip connector (PBL) gusset plate connection and applied it to RC frame structures. The design approach of the gusset plate and PBL connection was provided based on the generalized uniform force method. Based on this, the joint of a BRB-RC frame structure was designed, and finite element simulation and experimental analyses of the joints were carried out. The results showed that the connections in BRB-RC frames exhibited significant strength capacity, that the plastic hinge at the beam ends were transferred outside the connection region, and that the strength and energy dissipation capacity of the BRB were considerable. The proposed connection of BRBs and RC frames is effective and reliable, which significantly improves the seismic performance of the structure.

     

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