密肋复合墙体轴压作用下受力及影响因素研究

RESEARCH ON MECHANICAL BEHAVIOR AND INFLUENCE FACTORS OF MULTI-RIBBED SLAB STRUCTURE UNDER AXIAL COMPRESSION

以弹性地基梁理论为基础,提出密肋复合墙体在轴压作用下的简化力学模型,总结出求解此力学模型的计算方法,分析影响该复合墙体组件(外框柱、内肋柱和填充砌块)力分配关系的因素,并与试验结果进行对比。理论分析与试验结果表明:该力学模型的计算结果具有一定的精确度,适合作为密肋复合墙体在轴压作用下的计算模型,为密肋复合墙体结构在轴压及抗剪作用下力学分析的进一步完善提供了理论基础;各组件分配竖向荷载比例与多种因素有关,其中边框梁抗弯刚度和肋柱间距的影响最大,边框柱刚度变化的影响最小。

Based on elastic foundation beam theory, a mechanical model is suggested for multi-ribbed slab structure under axial compression, and solving methods of the model are given. It is analyzed the various factors of influencing the bearing of components in structure, which are compared with experimental results. Results of the theory analysis and experiment show that the mechanical model is suitable for analyzing multi-fibbed slab structure under compression, and the calculation result is very exact. The mechanical model provides an important theory foundation for more development of compression and shear capability analysis of multi-ribbed slab structure, the proportion of components bearing vertical loads relate to side frame beam stiffness, rib space and side frame column stiffness, and the most influence factors are side frame beam stiffness and rib space.