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密肋复合墙体是密肋结构中的重要受力构件,其作用是给结构提供必要的抗侧刚度并承受水平荷载作用。以9榀1/2比例密肋复合墙试件为对象进行试验研究,在保证墙体尺寸相同的条件下,依次改变轴压比、高宽比、框格数量等参数,较为系统地测试了各项设计指标对墙体受剪性能的影响。在分析试验结果的基础上,建立了带塑性铰刚架-斜撑计算模型,并基于MATLAB 6.5编写了弹塑性计算分析程序MRCS。构件中填充砌块、钢筋混凝土框格、隐形边框等采用了不同的杆系单元,考虑了杆端半刚性性能和刚域的影响,从而使结构的“开裂-屈服-失效机构形成”这一弹塑性全过程在计算中实现。经过对比,有限元计算结果与试验数据吻合较好,表明建立的计算模型及分析程序MRCS是可信的,可为密肋复合墙体的弹塑性全过程分析提供参考。
The multi-ribbed composite wall is an important force component in the multi-ribbed structure. The function of the multi-ribbed composite wall is to provide the structure with the necessary lateral rigidity and withstand the horizontal load. The test of 9 榀 1/2 ratio multi-ribbed composite wall specimens was carried out. Under the condition of the same wall size, the parameters such as axial compression ratio, aspect ratio, number of sash and so on were changed in a systematic way The influence of various design indexes on the shearing performance of the wall. Based on the analysis of experimental results, a plastic hinged frame-bracing model was established, and the elastoplastic calculation and analysis program MRCS was compiled based on MATLAB 6.5. The components of the block, reinforced concrete sash, invisible frame using different rod system unit, taking into account the semi-rigid rod end and the influence of rigid body, so that the structure of the "cracking - Yield - Failure mechanism This whole process of elasto-plasticity is realized in the calculation. After comparison, the results of FEM and experimental data are in good agreement, which shows that the established calculation model and analysis program MRCS are credible, which can provide a reference for the whole analysis of elastoplastic process of multi-ribbed composite wall.