矩型孔砖与圆孔砖砌体复合抗剪性能的对比

The Comparison of the Composite Shear Performance with Square Hole Bricks Masonry Structure and Round Hole Bricks Masonry Structure

《烧结多孔砖和多孔砖砌块》(GB13544-2011)[1]实施后,要求采用矩型孔多孔砖,同时取消了圆型孔砖。为了比较新规范实施前后两种主要孔型砖(圆孔、矩型孔)砌体抗剪性能的优劣,展开本次研究。通过对相同制作材料、相同外观尺寸、相同制作工艺、相同孔洞率的矩型孔砖和圆孔砖砌体进行复合抗剪试验研究,结果显示,在轴向压力较小时,圆孔砖砌体复合抗剪性能明显优于矩孔砖;当压力增大时,这种优势减弱。结论表明,圆孔砖的孔型抗剪受力更加合理,当轴压力增大时,孔洞中的砂浆键抗剪不受影响是导至优势减弱的主要原因。

When the code of fired perforated brick and block （GB13544- 2011 ）carried out, the government requirements that use square hole bricks instead of round hole bricks. In order to study the comparative results of the composite shear performance with square hole bricks masonry structure and round hole brick masonry structure, we did many experiments. According to the results, the masonry shear with round hole bricks is obviously better than the square hole bricks when the axial pressure is lesser, when the pressure increases, the advantage weakened. The results show that the round hole bricks groove shear stress more reasonable, the main reason is that when the axial pressure increase the shear of mortar in the holes is not affected.