密肋壁板结构中复合墙体的竖向承载力及稳定性研究

Research on the vertical bearing capacity and stability of the composite wall in multi-ribbed slab structures

通过对1/2模型密肋复合墙体在单调竖向荷载作用下试验研究,探讨墙体在竖向荷载作用下的受力特点及简化计算模型;分析墙体竖向受压承载力计算公式;考虑到密肋复合墙体自身支撑情况的特点,给出墙体计算高度的理论公式;提出外框柱对高厚比的影响系数,并对墙体高厚比限值进行了修正;最后得出墙体的高厚比验算公式.理论与试验表明:考虑梁的刚度及房屋高度的影响的计算模型更接近试验结果;提出的高厚比验算公式可满足密肋壁板结构中复合墙体的稳定性要求,具有一定的实际工程意义.

By researching the 1/2-scaled model walls under monotonic vertical loading, the authours of this paper aim to fulfill in this paper the following points： discussing the mechanical properties and simplified calculation model of multi-ribbed composite wall under vertical loading; analyzing the bearing capacity formula of multi-ribbed composite wall under vertical loading; providing calculated height according to characteristics of supporting conditions of multi-ribbed composite wall; presenting the influence coefficients of depth-width ration due to end frame columns; and modifying the limit value of depth-width ration. Finally, the formula for depth-width ration is deduced. It has been shown both from the theory and the experiment that the calculation model is more approximate to experimental results. As the rigidity of the beam and the height is taken into account. The formula for depth-width ration can meet the stability of multi-ribbed composite wall in the multi-ribbed slab structure.