Zhou Zhibin, Zhou Xuhong, Zhou Qishi, Fu Huawei, Liu Shuaishuai
School of Civil Engineering, Central South University, Changsha 410075, China.
National Engineering Research Center of High-Speed Railway Construction Technology, Changsha 410075, China.
Materials (Basel). 2023 Sep 19;16(18):6273. doi: 10.3390/ma16186273.
In this study, the hysteretic behavior of a novel frictional energy dissipation steel truss (FED-ST) is examined. The proposed FED-ST incorporates a friction damper with brass as the friction material into the top chord of traditional truss to improve the seismic performance of the staggered truss framing systems. A FED-ST specimen with a scale of 1:2.5 was subjected to a hysteresis test. The hysteretic behavior, ductility, and energy dissipation capability were analyzed considering the test findings. It is demonstrated that the FED-ST specimen has favorable ductility and an energy dissipation capacity that is 7.3 times more than that of a conventional truss specimen. The test findings were then used to compare and validate a finite element (FE) model. The FE analysis results are in strong agreement with the test results, demonstrating the validity of the modeling approach. To further investigate the impact of the cover plate width on the behavior of the FED-ST, preliminary parametric research was also carried out.
在本研究中，对一种新型摩擦耗能钢桁架（FED-ST）的滞回性能进行了研究。所提出的FED-ST在传统桁架的上弦杆中加入了以黄铜为摩擦材料的摩擦阻尼器，以提高交错桁架框架体系的抗震性能。对一个比例为1:2.5的FED-ST试件进行了滞回试验。结合试验结果分析了滞回性能、延性和耗能能力。结果表明，FED-ST试件具有良好的延性，其耗能能力是传统桁架试件的7.3倍。然后利用试验结果对有限元（FE）模型进行了比较和验证。有限元分析结果与试验结果高度吻合，证明了建模方法的有效性。为了进一步研究盖板宽度对FED-ST性能的影响，还开展了初步的参数研究。
