This paper introduces beam-through framed connections (BTFCs) with innovative T-type curved knee braces (TCKBs). Beam-through steel frame (BTF) is an emerging system using strip braces as lateral force-resisting components. Even though strip braces can provide high strength and stiffness, they will get slack after yielding since compressive buckling, and dynamic characteristics of the system will be unstable. Innovative T-type curved knee braces are intended to provide stable strength and full energy dissipating capacity. By equipping a BTF with TCKBs, seismic performance of the system can be improved, and architectural space can be released. In order to verify the reasonability of construction details, investigate failure modes and damage sequences, a total of three full-scale specimens with different TCKBs were designed and tested under incremental cyclic loading. Results of tests demonstrated the expected stable hysteretic behaviors, controllable damage sequences and superior ductility. Damages were mainly concentrated on knee braces within 2.0% drift ratio. With subsequent increase of the loading amplitude, plasticity was observed on beam-to-column connection area. Tested knee braces started to be fractured when drift ratio reached 7.0% approximately which was treated as the failure mode. In the final stage of loading, webs of knee braces fractured one after another. After web of four knee braces fractured, specimen could still exhibit partial strength derived from damaged braces and semi-rigid beam-to-column connection which indicated the safety storage after failure mode.

本文介绍了具有创新的T型弯曲膝盖支架（TCKB）的梁式框架连接（BTFC）。梁式钢框架（BTF）是一种新兴的系统，使用条形支撑作为侧向抗力组件。即使带状支撑可以提供高强度和刚度，但由于压缩屈曲，它们在屈服后仍会松弛，并且系统的动态特性将不稳定。创新的T型弯曲护膝旨在提供稳定的强度和充分的能量消散能力。通过为BTF配备TCKB，可以提高系统的抗震性能，并释放建筑空间。为了验证施工细节的合理性，研究破坏模式和损坏顺序，总共设计了三个具有不同TCKB的满量程标本，并在增量循环载荷下进行了测试。测试结果表明，预期的稳定的磁滞行为，可控的破坏序列和出色的延展性。伤害主要集中在漂移率为2.0％以内的护膝上。随着载荷振幅的增加，在梁到柱的连接区域观察到可塑性。当漂移率达到约7.0％时，被测试的护膝开始骨折，这被视为故障模式。在加载的最后阶段，膝盖支架的网片接连破裂。四个护膝网破裂后，试样仍会表现出由损坏的护具和半刚性梁至柱连接引起的部分强度，这表明失效模式后的安全存储。