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Welding Performance of Low-Yield-Strength Steel Shear Panel Dampers Under Large Plastic Deformation
Chaofeng Zhang,Shixi Chen,Junhua Zhao,Xuchuan Lin,Lingxin Zhang,Jiajia Zhu,Weili Wang 한국강구조학회 2021 International Journal of Steel Structures Vol.21 No.6
Characterized by large plastic deformation and energy-dissipation capacity, low-yield-strength steel shear panel dampers (LYSPDs) are widely used as energy-dissipating members in seismic engineering. However, the eff ect of welding on the properties of LYSPDs remains unclear. Hence, in this study, we investigated the matching performance between low-yieldstrength steel (LYS) and two diff erent welding materials. Subsequently, the quality of welding between LYS and dissimilar metals was investigated. Furthermore, the fracture characteristics of the welding seam of LYS under large plastic deformation were explored. Finally, the welding performance of LYSPDs under large plastic deformation was verifi ed under cyclic loading. The results of this study are signifi cant in terms of the eff ect of welding on the properties of LYSPDs.
Fei Zhao,Qifang Lu,Zhiliang Xiu,Chaofeng Zhu 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.4
One-dimensional (1D) CuO/In2O3 heterostructured nanofibers with the diameter of about 300 nm were successfully prepared through combining a facile single-capillary electrospinning with sintering process, and investigated by thermogravimetric and differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) techniques, etc. The photocatalytic activities were examined by degrading methylene blue (MB) under 500W xenon lamp, halogen lamp and mercury lamp irradiation, respectively. The heterostructured nanofibers exhibited a higher photocatalytic activity than P25-TiO2 under 500W xenon lamp irradiation due to the enhanced absorption for visible light and the efficient electron–hole separation and transportation. The single CuO microfibers and In2O3 nanofibers were also prepared as the control groups by the same method.