阻尼填充墙高性能砂浆阻尼层性能试验研究

设计了一种用于阻尼填充墙的高阻尼砂浆层阻尼层,并对其进行拟静力试验,研究其力学性能.结果表明:与一般砂浆层相比,高阻尼砂浆阻尼层具有更大的耗能与变形能力.当聚灰比在0.38~0.53的范围内,随着聚合物含量的增加,高阻尼砂浆阻尼层的耗能能力和变形能力都有明显的增加,超出了这个范围,提高聚合物含量的效果不大.采用苯丙乳液和丁苯乳液共混且聚灰比为0.45的高阻尼砂浆作阻尼层能取得最大的耗能与变形能力.增大高阻尼砂浆阻尼层的厚度可以提高其水平变形能力,可以较好延缓上部砌体单元与阻尼层之间的滑移,提高阻尼层的耗能能力,但是极限承载力会随着厚度的增加而降低,阻尼层的厚度取为9mm较适宜.

Experimental Study on Mechanical Properties of Damped Infill Wall with High Performance Mortar Damped Layers

A kind of high-damping mortar layer applied to damped infill wall was designed, and the pseudo-static experiments were carried out, also its mechanical properties were studied. The results reveal that: compared with common mortar layer, high-damping mortar layer has greater energy dissipation and horizontal shear deformation capacity in damped infill walls. When the polymer-cement ratio is in the range of 0.38~0.53, with the increase of polymer content in high-damping mortar layer, the energy dissipation and horizontal shear deformation capacity of mortar layer in damped infill walls will be enhanced; the optimal polymer-cement ratio is 0.45. With the increase of the thickness of high-damping mortar layer, horizontal shear deformation capacity of mortar layer in damped infill walls will be improved, the slip between the upper masonry and high-damping mortar layer will be delayed, this enhancing its energy dissipation capacity; however, with the increase of the thickness of high-damping mortar layer, the ultimate bearing capacity of mortar layer in damped infill walls will be reduced, the better value of thickness of high-damping mortar layer is about 9 mm.