无填充砌块节能砌块隐形密框墙体裂缝发展规律及破坏模式分析

Law of crack propagation and failure mode of energy-saving block and invisible multi-ribbed frame walls without filled block

对1片1/2比例无填充砌块的仅由边框及肋梁肋柱组成的节能砌块隐形密框墙体试件进行了拟静力试验,以此试验结果为基础,通过2片有、无填充砌块的节能砌块隐形密框墙体试件拟静力试验结果的比较,对墙体裂缝发展规律及破坏模式进行分析,指出:在低周往复荷载作用下,无填充砌块墙体的小肋梁主要表现为受弯受拉裂缝,而小肋柱则表现为受弯受剪斜裂缝,并且该墙体表现为比较理想的破坏模式——剪压破坏;框格与砌块的相互协调作用非常明显,砌块的作用相当于铰接于框格的斜压杆.

A piece of the 1/2-scaled model well of energy-saving block and invisible multi-ribbed frame walls without filled block and only composed by the border,the rib beam and the rib pillar,is investigated through pseudo static test.On the basis of the experimental results,and through the comparative analysis of two pieces of energy-saving block and invisible multi-ribbed frame walls with filled block and without it the results of the well models were analyzed through the wall cracking process and the law of crack propagation.The analysis shows that the small rib beams are mainly cracked by bending and tension,and the small rib pillars are mainly cracked by bending and shearing.The wall shows the more ideal failure mode,the shear and stress failure.The reciprocal coordination function of gridiron and block is very significant,and the effect of the filled block is equivalent to compression strut.