大开间小型混凝土砌块10层模型房屋抗震性能试验研究(Ⅰ)

我国抗震设计规范（GB50011－2001）规定在6、7、8度区，混凝土小砌块结构分别可以建七、六、五层。由于混凝土小砌块结构的最大优势在于10－20层（与混凝土框架或框架剪力墙结构比）。本文按1／4比例制作了10层混凝土小砌块结构模型，按7度设防要求实施构造措施，通过振动台试验研究模型结构的抗震性能。结果表明，模型结构完全能够满足在7度区“小震不坏，大震不倒”的要求。圈梁、构造柱以及水平拉结筋构成的约束体系抗震作用是明显的。试验利用砌块的非注芯孔灌注铁砂来模拟墙体出平面动力效应。在本模型的构造措施下，平出面反应不对结构破坏起控制作用。

Shaking table test for seismic behavior of a 10 storied hollow concrete block masonry building

According to the Chinese seismic code(GB50011-2001) the stories limit is 7,6 and 5 for hollow concrete block masonry structure at seismic intensity area of 6,7 and 8 respectively. But the advantages of hollow concrete block masonry structure will exhibit on stories of 10 to 20 (comparing with concrete frame or concrete frame with shear walls structures). Here a 10 storied hollow concrete block masonry structure model with a 1/4 scale factor is constructed with 19% of core pouring ratio. Different levels and different spectra of earthquake records are input into the model by shaking table. The results show that such a model can surely meet the seismic demand for intensity 7. It seems that it is unnecessary to restrict the story number under 6 at intensity 7areas. The seismic effectiveness of the tie beams and columns is obvious. The left 8% of the cores are poured with cast iron particles, thus the out of plane behavior of the walls can be well simulated. In fact, the out-of-plane response does not act as a control factor.