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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。
The energy dissipation element of low yield point steel shear plate has good energy dissipation capacity, which can consume most of the seismic energy input into the structure and improve and enhance the seismic performance of the structure. In order to investigate the effect of initial out-of-plane flaw on the post-buckling stability of energy dissipating elements in low yield point steel, one traditional I-beam energy-dissipating element and three low-yield point steel with out-of- Low cycle reciprocating cyclic loading tests of energy dissipating components were carried out. The effects of initial out-of-plane flaws, aspect ratio of energy dissipating elements and reinforced concrete confinement on its mechanical properties were investigated emphatically. The results show that the initial out-of-plane flaw has a great influence on the mechanical behavior of the shear plate. The reinforced concrete restraining plate can effectively restrain the out-of-plane buckling deformation of the shear plate. The flange plate can effectively suppress the overall torsional buckling of the shear plate Deformation, thereby increasing the energy consumption of shear-plate energy-consuming components.