设芯柱的蒸压加气混凝土砌体承重墙抗震性能试验

通过3片设芯柱的蒸压加气混凝土砌体承重墙足尺试件的低周反复荷载试验,研究了这种组合墙体的破坏过程与特征,以及滞回特性、承载力、变形、刚度退化、耗能等方面的性能,并比较了开洞对墙体性能的影响.试验表明,在蒸压加气混凝土砌体墙中设置芯柱后,对墙体形成有效的约束,使墙体具有很好的极限变形能力,实现裂而不倒,是将蒸压加气混凝土砌块砌体墙用作承重墙体的一种有效抗震构造措施.研究还表明,这种组合墙体变形性能的改善程度与芯柱的设置情况有关;而墙体的抗剪承载力受开洞影响较大,随洞口水平截面积的增大而明显降低.研究结果为蒸压加气混凝土砌块砌体承重墙结构体系的应用提供了试验依据.

Experimental Study on the Seismic Behavior of Autoclaved Aerated Concrete Block Bearing Walls With Core Columns

The experiments of three full-scale specimens of autoclaved aerated concrete(AAC) block bearing walls with core columns,subjected to laterally low-cyclic reversed loading,were carried out to investigate their seismic performance,including their failure mode,hysteretic behavior,seismic load-carrying capacity,deformation,stiffness degradation and energy-dissipation ability,etc.The effect of the wall's opening on its seismic behavior was also studied.It is shown that,with the confinement of reinforced concrete core columns,AAC block composite bearing walls have a good ultimate deformation capacity to prevent collapse after cracking.So,it is an effective measure of AAC block bearing walls for the purpose of seismic resistance.The test results also show that the improvement of the AAC block composite bearing walls with core columns mainly depends on the way in which core columns are used,and its seismic load-carrying capacity is related to the openings of the wall,decreasing with the increase of the size of openings.The study provides useful references for application of the structural system with autoclaved aerated concrete block bearing walls.