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(南京林業(yè)大學(xué)土木工程學(xué)院， 南京 210037)

［摘要］針對地震中普通磚砌體填充墻框架結(jié)構(gòu)普遍出現(xiàn)的問題，提出一種裝配式秸稈砌塊填充墻框架結(jié)構(gòu)體系。通過一個(gè)1∶3的普通磚砌體框架結(jié)構(gòu)模型和一個(gè)1∶3的裝配式秸稈砌塊填充墻框架結(jié)構(gòu)模型的地震振動(dòng)臺對比試驗(yàn)，研究了新結(jié)構(gòu)體系在不同烈度地震作用下的動(dòng)力響應(yīng)及宏觀破壞模式?？梢园l(fā)現(xiàn)，兩個(gè)框架模型一階頻率的衰減規(guī)律基本一致，但破壞模式不同，裝配式秸稈砌塊填充墻框架結(jié)構(gòu)模型梁端出現(xiàn)塑性鉸而柱端完好，屬于“強(qiáng)柱弱梁”破壞；同時(shí)，試驗(yàn)過程中裝配式秸稈砌塊填充墻框架結(jié)構(gòu)模型的最大層間位移分布于1層與3層，沒有形成底層薄弱層。試驗(yàn)結(jié)果表明，新結(jié)構(gòu)體系傳力途徑清晰，結(jié)構(gòu)剛度分布均勻，滿足“小震不壞、中震可修、大震不倒”的抗震設(shè)防要求。

［關(guān)鍵詞］框架結(jié)構(gòu)； 裝配式秸稈砌塊填充墻； 振動(dòng)臺試驗(yàn)； 強(qiáng)柱弱梁； 地震響應(yīng)

中圖分類號：TU317,TU375-4文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)11-0048-04

Shaking table comparison tests of frame structure with fabricated straw brick infilled wall

Zhao Longlong， Wang Xiaorui， Huang Dongsheng， Gong En

(College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China)

Abstract:A structural system named fabricated straw brick infilled frame structure system was proposed to solve common problems of frame structure with ordinary brick masonry infilled wall under earthquakes. A 1∶3 scaled common brick masonry frame structure model and a 1∶3 scaled fabricated straw brick infilled wall frame structure model were tested by shaking table tests to compare. The dynamic responses and macroscopic failure modes of the new structural system under different seismic intensities were studied. It can be found that the attenuation law of the first-order frequencies of the two frame models is basically the same, but the failure modes are different. The plastic hinges appear at the end of the beams and the ends of the columns are intact in fabricated straw brick infilled wall frame structure model, which belongs to the destruction of “strong column and weak beam”. Meanwhile, the maximum inter-story displacement of  the fabricated straw brick infilled wall structure model is distributed in the first and third stories, and weak bottom story is not formed. The test results show that the new structural system has clear transmission way and uniform stiffness distribution, which meets the seismic fortification requirements of "no damage under small earthquakes, repairable in fortification earthquakes and no collapse under rare earthquakes".

Keywords:frame structure; fabricated straw brick infilled wall; shaking table test; strong column and weak beam; seismic response