Under severe earthquakes, a significant number of unexpected plastic hinges and brittle failure were found in conventional rigid beam to column welded connections of steel frames. To improve the seismic performance of steel frames, an innovative prefabricated self-centering beam to column (SCBC) connection was proposed and experimentally validated in this paper. The SCBC connection consisted of disc springs at the bottom flange of beam and a rotation friction hinge (RFH) at the beam end. The bottom disc springs could not contact with slab systems and provided restoring moment, whereas the RFH was designed to dissipate seismic energy. Firstly, its configuration form and design methodology were introduced. Then cyclic tests of a 1/4 scale SCBC connection specimen was carried out and the responses of the SCBC connection was compared to that of the RFH. Finally, the restoring force model of the SCBC connection was established through theoretical analysis. The experimental and analytical results demonstrated full flag-shaped hysteretic curves of the SCBC connection under cyclic loadings, verifying the desirable energy dissipation capacity and reliable self-centering capability of the SCBC connection. The calculation results based on the restoring force model were in good agreement with the test results, showing that the proposed restoring force model could reasonably predict the hysteretic behavior of the SCBC connection.

在严重地震下，在钢框架的传统刚性梁到柱焊接连接中发现了大量意外的塑料铰链和脆性破坏。为了提高钢框架的抗震性能，提出了一种创新的预制自定心梁到柱（SCBC）连接，并在本文中进行了实验验证。SCBC连接由位于梁底部法兰的碟形弹簧和位于梁末端的旋转摩擦铰链（RFH）组成。底部碟形弹簧无法与平板系统接触并提供恢复力矩，而RFH旨在消散地震能量。首先介绍了它的配置形式和设计方法。然后对1/4比例SCBC连接样品进行循环测试，并将SCBC连接的响应与RFH的响应进行比较。最后，通过理论分析建立了SCBC连接的恢复力模型。实验和分析结果表明，在循环载荷下，SCBC连接具有完整的旗形滞后曲线，证明了SCBC连接具有理想的耗能能力和可靠的自定心能力。基于恢复力模型的计算结果与试验结果吻合良好，表明所提出的恢复力模型可以合理地预测SCBC连接的滞后行为。实验和分析结果表明，在循环载荷下，SCBC连接具有完整的旗形滞后曲线，证明了SCBC连接具有理想的耗能能力和可靠的自定心能力。基于恢复力模型的计算结果与试验结果吻合良好，表明所提出的恢复力模型可以合理地预测SCBC连接的滞后行为。实验和分析结果表明，在循环载荷下，SCBC连接具有完整的旗形滞后曲线，证明了SCBC连接具有理想的耗能能力和可靠的自定心能力。基于恢复力模型的计算结果与试验结果吻合良好，表明所提出的恢复力模型可以合理地预测SCBC连接的滞后行为。