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The Seismic Performance Analysis of H-Shaped Steel PEC Columns

机译:H型钢PEC柱的抗震性能分析

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The H-shaped steel PEC columns with concrete poured between flanges are different from the traditional steel-encased concrete columns. In this paper, the behaviors of H-shaped steel PEC columns with different parameters under axial loading and cycling loading have been simulated by using commercial software ANSYS. The results show: The fracture of the columns under axial loading and cycling loading mainly lies in the crush of concrete at the bottom of the columns. Because of the confined effect of steel, the stress distribution of specimens under axial loading display a V-shape. With the increment of the width of flanges, the confined effect becomes more obvious. Compared with H section steel columns, the bearing capacity has been increased. With the increment of axial compression ratio, the capacity has declined. The behaviors of the ductility and the energy dissipation capacity of H section steel PEC columns are good and dropped with the increment of axial compression ratio. At the initial stage, the average stiffness degenerates slowly. However, at the later stage, the average stiffness degenerates rapidly. Moreover, the degeneration becomes faster with the increment of compression ratio. The elastic stage, elastic-plastic stage and plastic stage are included in the skeleton curves. This study on the H-shaped steel PEC columns has important practical implications to the engineering.
机译:在法兰之间浇注混凝土的H型钢PEC柱不同于传统的钢制混凝土柱。本文利用商用软件ANSYS对不同参数的H型钢PEC柱在轴向载荷和循环载荷下的行为进行了模拟。结果表明:在轴向荷载和循环荷载作用下,柱体的断裂主要在于柱体底部的混凝土压溃。由于钢的约束作用,在轴向载荷下试样的应力分布呈V形。随着法兰宽度的增加,限制作用变得更加明显。与H型钢柱相比,承载能力有所提高。随着轴向压缩比的增加,容量下降。 H型钢PEC柱的延性和能量耗散性能良好,并且随着轴向压缩比的增加而降低。在初始阶段,平均刚度会缓慢退化。但是,在后期,平均刚度迅速退化。而且,随着压缩比的增加,退化变得更快。骨架曲线包括弹性阶段,弹塑性阶段和塑性阶段。 H型钢PEC柱的研究对工程具有重要的实际意义。

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