新型节能复合混凝土空心砌块砌体抗震性能的试验研究

Experimental study on seismic behavior of composite concrete small-sized hollow block masonry

本文通过2片开窗洞加窗台梁节能复合混凝土小型空心砌块墙体和2片不开窗洞墙体的水平低周反复荷载试验,研究了节能复合混凝土小型空心砌块砌体墙的受力全过程、开裂部位、裂缝发展情况以及破坏形态,分析了墙体的滞回特性、延性、耗能能力,刚度退化曲线等抗震性能,同时,考察了墙体外叶保护层的受力性能、破坏程度以及与墙体的共同工作机理,探讨了不同构造措施以及开窗洞对墙体抗震性能的影响。研究结果表明:复合混凝土小型砌块砌体从开始加载到最终破坏,砌块保护层都没有明显的鼓凸和脱落现象,说明聚苯层及横向拉结筋能够提供可靠的连接,保证外叶保护层在水平剪力和竖向荷载共同作用下和墙体整体工作,此外,开窗洞对墙体的抗震性能削弱较大。

Based on the low cyclic reversed lateral loading tests of two pieces of small-sized composite concrete hollow block masonry walls withwindows and two walls without opening, the behavior such as deformation process, failure mechanism, hysteretic characteristic, ductility, energy-dissipation capacity and curve of stiffness degradation was studied. In the mean time, the behavior and the failure mode of the protection layer under loading were clarified, and the effects of constructional measures and window opening on the seismic behavior of walls were investigated. The test results reveal that from the beginning to the end, the out-side layer of the composite concrete small- sized hollow block wall was not much damaged, which show that the out-side layer can be connected with the wall well and keep the normal-working of the wall under vertical and horizontal loading, This paper also shows that the windows hole will reduce the seismic resistance of the walls.