沙漠砂蒸压加气混凝土砌块墙体的抗震性能试验研究

Experimental study on seismic behavior of autoclaved aerated concrete block wall in desert sand

沙漠砂蒸压加气混凝土砌块是一种新型墙体建筑材料,本文利用沙漠砂制成的B06级沙漠砂蒸压加气混凝土砌块,以村镇建筑为对象,设计了两片在不同的竖向压应力0.1MPa和0.3MPa作用下的墙体,进行了拟静力试验的研究,分析了墙体在这两种竖向压应力作用下的破坏特征、滞回曲线、骨架曲线、耗能能力、延性系数以及刚度退化曲线。结果表明:在水平低周反复荷载作用下,墙体的破坏主要以剪切破坏为主,随着压应力的增加,墙体在破坏时的斜裂缝显著增加,且刚度退化更平缓;在竖向压应力为0.3MPa作用下墙体的极限荷载、延性系数大约是0.1MPa作用下的1.71倍和1.16倍。研究结果可为沙漠砂蒸压加气混凝土砌块墙体的承载力理论计算提供数据支撑。

Desert sand autoclaved aerated concrete block is a new type of wall building material. This paper uses B06 grade desert sand autoclaved aerated concrete block made of desert sand. Taking the village buildings as the object, two walls with different vertical compressive stresses of 0.1 MPa and 0.3 MPa are designed. The pseudo-static test is carried out and the two vertical compressive stresses of the wall are analyzed, including the destructive characteristics, hysteresis curves, skeleton curves, energy dissipation, ductility coefficients, and stiffness degradation curves. The results show that, under the action of horizontal low-cycle repeated loading, the damage of the wall is mainly shear failure. With the increase of compressive stress, the oblique crack of the wall is significantly increased, and the stiffness degradation is gentler. The ultimate load and ductility coefficient of the wall under the action of vertical compressive stress of 0.3 MPa is about 1.71 and 1.16 times than those of under the action of 0.1 MPa. The research results can provide data support for the theoretical calculation of bearing capacity of desert sand autoclaved aerated concrete block wall.