混凝土小型空心砌块空腔墙体的恢复力试验研究

Restoring force of small concrete hollow block cavity wall

通过六片不同构造形式的混凝土小型空心砌块墙体在往复水平荷载作用下的恢复力试验,了解了设置半包构造柱及芯柱的砌块空腔墙体的破坏特征、承载及变形能力、延性、两叶墙协同工作性能等问题。试验结果表明空腔墙的内、外叶之间由于拉结筋的作用,在一定程度上能共同工作,使墙体的抗失稳与抗倒塌能力增强;内叶墙两端半包构造柱的设置增加了墙体刚度,使试件的承载和变形能力得到提高,从而改善了砌块墙体的抗震性能。该试验得到的结果及分析,可为空腔墙砌块建筑的设计提供依据。

Experiments was made with 6 small concrete hollow block cavity walls with structural columns or core columns in internal-layer to investigate their failure modes, load-bearing and deformation capacity, ductility and coordination between two cavity walls under the action of to-and-from horizontal loads. The experiment results show that steel tie bars play an important role in preventing cavity walls from losing stability and collapsing; internal and external layers work together to some extent; structural columns in internal layer of cavity walls increase wall rigidity, improve load-bearing capacity, ductility and aseismic behavior of walls.