不同参数下低屈服点钢剪切板耗能元件受力性能试验研究

发布时间：2019-03-06 14:04

【摘要】：低屈服点钢剪切板耗能元件具有良好的耗能能力,可以消耗输入结构中的大部分地震能量,改善和提高结构的抗震性能。为了考察面外初始缺陷对低屈服点钢剪切板耗能元件屈曲后稳定性的影响,开展了1个传统工字钢耗能元件和3个具有面外初始缺陷的低屈服点钢剪切板耗能元件的低周往复循环荷载试验,重点考察了面外初始缺陷、耗能元件宽厚比和钢筋混凝土约束板对其受力性能的影响。研究结果表明:面外初始缺陷对剪切板的受力性能影响较大,钢筋混凝土约束板可有效抑制剪切板的面外局部屈曲变形,翼缘板可有效抑制剪切板的整体扭转屈曲变形,从而提高剪切板耗能元件的耗能能力。
[Abstract]:The low yield point steel shear plate energy dissipation element has a good energy dissipation capacity, which can consume most of the seismic energy in the input structure, and improve the seismic performance of the structure. In order to investigate the effect of out-of-plane initial defects on post-buckling stability of energy dissipation elements of low yield point steel shear plates, The low cycle cyclic loading tests of one traditional I-beam energy dissipation element and three low yield point steel shear plate energy dissipation elements with out-of-plane initial defects were carried out, and the out-of-plane initial defects were investigated emphatically. The influence of width-to-thickness ratio of energy dissipation element and reinforced concrete confined slab on its mechanical performance. The results show that the out-of-plane initial defects have a great influence on the mechanical behavior of the shear plate. The reinforced concrete confined slab can effectively restrain the out-of-plane local buckling deformation of the shear plate, and the flange plate can effectively restrain the overall torsional buckling deformation of the shear plate. As a result, the energy dissipation capacity of the shear plate energy dissipation element is improved.
【作者单位】：重庆大学土木工程学院;
【基金】：国家自然科学基金项目(51508052) 国家重点研发计划项目课题一(2016YFC0701201)
【分类号】：TU391

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