密肋复合双片墙体的受力性能研究

ANALYSIS OF MECHANICAL BEHAVIORS OF MULTI-RIBBED COMPOSITE-DOUBLE WALL

密肋壁板结构的横墙通常由双片墙体构成,在课题组前期科研成果的基础上,通过对1/2模型密肋复合双片墙体在水平单调荷载作用下的试验与标准密肋复合墙体的对比分析,对双片墙体的主要破坏特征进行研究;探讨双片墙体的承载能力、刚度、变形能力、延性等受力性能;对双片墙体钢筋应变进行分析;最后提出复合双片墙体的刚度和受剪承载力的计算公式。试验结果及理论研究表明:密肋复合双片墙体的承载力、变形能力、延性均好于标准密肋复合墙体,钢筋应变表明,外框柱、肋梁对双片墙体的受力性能贡献较大。提出的双片墙体受剪承载力计算式与刚度计算式能够较好地反映双片墙体真实的受力性能,有一定的适用性。

Outer-horizontal walls of multi-ribbed slab structure are composed of composite-double wall, based on the previous studies of the subject, and by researching on the test of a 1/2-scaled multi-ribbed composite-double wall under monotone horizontal loading in contrast with single wall, the followings are done： studying the main failure patterns; discussing the mechanical behaviors such as bearing capacity, stiffeness, distortion capacity, ductility and so on ; analyzing the strain; finally, the formulas of rigidity and shear-bearing capacity are deduced. It can be concluded as follows： the distortion capacity and ductility of the double wall are better than those of the single wall, and the stiffeness and shear-bearing capacity of the double wall are more than those of the single wall also; strain analysis shows that the ending columns and ribbed beams play a more important role in the double wall with; the value of the Shear-beating capacity formula and stiffeness formula are approximate to the experimental result, and can be applied to the practical engineering.