箱板式钢结构住宅底部加强区的单片组合墙体有限元分析

FINITE ELEMENT ANALYSIS OF SINGLE COMPOSITE WALL IN THE BOTTOM REINFORCED ZONE OF BOX-TYPE STEEL STRUCTURE RESIDENCE

提出一种既能承压又能抗剪的新型组合钢板墙,通过有限元软件ABAQUS分析其与普通钢板墙、带竖向加劲肋钢板墙在水平往复荷载作用下的承载力和滞回性能的异同点;着重分析螺栓间距、混凝土板厚度、钢板高厚比、钢板与混凝土板间隙和竖向荷载对组合墙承载力和滞回性能的影响。分析结果表明:组合钢板墙中加劲肋和混凝土板的存在有效抑制了钢板的平面外屈曲变形,提高了承载能力和滞回性能;螺栓间距越小,承载能力和滞回性能越好;混凝土板厚度越大,滞回性能越好;钢板高厚比越小,承载能力和滞回性能越好;钢板与混凝土板间隙对承载能力和滞回性能影响很小;竖向荷载越大,延性越差,耗能能力越强。

A new composite wall is supported to bear both vertical load and shear force. By using the finite element software ABAQUS, the differences and similarities among bearing capacity and stability of the general steel plate wall, stiffened steel plate wall and composite wall with vertical stiffeners were analyzed under horizontal cyclic loading. The paper also analyzed the effects of bolt spacing, the thickness of concrete slab, the height-thickness ratio of steel plate, the clearance between steel plate and concrete slab and vertical load on the bearing capacity and hysteretic behavior of the composite wall. The results showed that the stiffener and the concrete slab in the composite wall could effectively restrain the out-of-plane buckling deformation of the steel plate and improve the bearing capacity and hysteretic behavior; the smaller the bolt spacing was, the better the bearing capacity and hysteretic behavior; the greater the thickness of concrete slab was, the better the hysteretic behavior; the smaller the height-thickness ratio of steel plate was, the better the bearing capacity and hysteretie behavior; the gap between steel plate and concrete slab had little effect on the bearing capacity and hysteretie behavior; the greater the vertical load was, the worse the ductility and the stronger the energy dissipation capacity.