轻钢泡沫混凝土组合墙体竖向承载力试验

Tests on Vertical Bearing Capacity of Steel-Foamed Concrete-Fiber Cement Pressure Plate Composite Walls

目的为推广轻钢-泡沫混凝土-纤维水泥压力板组合墙体的应用,在外部贴纤维水泥压力板的轻钢龙骨组合墙体里灌注泡沫混凝土,研究轴心受压承载力对墙体的影响.方法通过对5块轻钢-泡沫混凝土-纤维水泥压力板组合墙体进行轴心受压承载力试验,分别研究了有无泡沫混凝土、有无拉条、墙面板与立柱连接自攻螺钉间距对墙体承载力的影响.结果内部填充泡沫混凝土后,轻钢立柱不再发生整体弯曲屈曲,只发生局部屈曲;竖向荷载作用下的稳定承载力显著提高;螺钉间距由400 mm加密至200 mm,轴心受压承载力随之增大;拉条对承载力的提高不明显.结论在轻钢-泡沫混凝土-纤维水泥压力板组合墙体承受轴心受压时,内部填充的泡沫混凝土会发挥一定的作用,建议在进行竖向承载力计算时,考虑泡沫混凝土的影响.

In order to promote the application of steel-foam concrete-fiber cement pressure plate composite wall,to explore the influence of the bearing capacity of the axial compression bearing capacity of the light steel keel wall with the external fiber reinforced concrete pressure plate on the foam concrete.After the test of the vertical axial compression bearing capacity of 5 steel-foam concrete-fiber cement pressure plate composite walls,the effects of filled foam concrete and without foam concrete,with brace and without brace,and the influence of the spacing of the self tapping screws between the wall panel and the column on the stability of the column under the vertical load is obtained.When the foam concrete is filled inside the wall,the flexural bending of the lightweight steel column is no longer occurring,and the column is confined to local buckling.The stability of the bearing capacity under vertical load is significantly improved.The load capacity increases as the screw spacing is encrypted from 400 mm to 200 mm.The brace does not affect the improvement of bearing capacity.The foam concrete filled in the light steel foam concrete fiber cement pressure plate composite wall will play a certain role when the wall is subjected to the axial compression.It is suggested that the effect of foam concrete should be taken into account when calculating the vertical bearing capacity.