型钢再生混凝土短梁框架抗震性能试验研究

Experimental study on seismic behavior of SRRAC short beam frame

为了研究型钢再生混凝土短梁框架结构的抗震性能,以取代率为变化参数,设计了3榀取代率分别为0、50%、100%的方钢管再生混凝土柱型钢再生混凝土短梁框架,对其进行低周往复加载试验。结果表明:滞回曲线的形状皆为较饱满平滑的梭形;框架发生破坏时,等效黏滞阻尼系数均大于0.30,层间位移转角在1/41~1/36,这表明试件具有良好的耗能性能以及抗倒塌能力;短梁框架的承载力受取代率的影响较小,延性有所降低,但差别不大;与钢筋混凝土短梁框架相比,型钢再生混凝土短梁框架具有更好的耗能能力。

In order to study the seismic behavior of steel reinforced recycled aggregate concrete(SRRAC)short beam frame,three frames with RAC filled-square steel tube column and SRRAC short beam with respective replacement ratios of 0、50%and 100%are designed and subjected to low-cyclic reversed loading.The main conclusions are:(1)The hysteresis curves of three specimens present plump and smooth shuttle shape.(2)All the equivalent linear damping coefficient(he)of frames exceed 0.30 and the inter-story displacement angle(θ)of specimens are between 1/41-1/36 when frames are destroyed,which shows that the structure has good energy consumption performance and good collapse resistance ability.(3)Replacement rate of the recycled aggregate concrete has little effect on the specimen carrying capacity,and the ductility decrease slightly with the increase of replacement rate.Compared with the reinforced concrete short beam frame,the SRRAC short beam frame has better energy consumption capacity.