格構(gòu)角鋼立柱軸壓試驗(yàn)及有限元分析
[Abstract]:Taking the lattice angle column in the composite wall as the object, the ultimate bearing capacity and failure mode of the lattice angle steel column are studied by axial compression test and finite element analysis, aiming at 5 different thickness of 0.8 mm ~ 1.0 mm ~ (1.2 mm) ~ 1.5 mm ~ (-1) mm ~ (1.8 mm), and compared with each other. The results show that the axial bearing capacity and load-displacement curves of three lattice angle column specimens of the same thickness are different due to the difference of initial geometric defects, and because of their sensitivity to initial geometric defects, When the thickness value is small, the axial ballast force of the three specimens differs greatly, but when the thickness is larger, the axial compression capacity of the three specimens is very small, because the stiffness and rotation stiffness around the weak axis are very low. The basic occurrence of lattice angle column is buckling failure around weak axis, or accompanied by local distortion or convexity in the middle of column. The load-axial displacement curve obtained by finite element analysis is consistent with the test curve, the failure mode is basically the same, and the ultimate bearing capacity is in good agreement. The correctness and rationality of the finite element modeling method proposed in this paper for lattice angle column are explained.
【作者單位】: 武漢理工大學(xué)土木工程與建筑學(xué)院;
【基金】:湖北省科技廳項(xiàng)目(2014BAA122) 湖北省建設(shè)科技項(xiàng)目
【分類號(hào)】:TU398.9
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