不同再生骨料取代率混凝土双肢剪力墙低周反复荷载试验研究

Low-cycle Loading Experimental Study on Coupled Shear Walls With Different Replacement Ratio of Recycled Aggregate

为了研究再生骨料对双肢剪力墙性能的影响,本文对4个1∶4缩尺的4层双肢剪力墙进行了低周反复荷载试验,各模型连梁跨高比均为1.0.模型1为普通混凝土双肢剪力墙,模型2、3分别为再生骨料取代率为50%、100%的再生混凝土双肢剪力墙,模型4为带暗支撑全再生混凝土双肢剪力墙.分析了各双肢剪力墙的抗震性能.结果表明:与普通混凝土双肢剪力墙相比,再生混凝土双肢剪力墙的抗震性能略差,且再生混凝土双肢剪力墙的抗震性能随再生骨料掺量的增加而下降;加配暗支撑可以使再生混凝土双肢剪力墙的抗震性能有效提高.建立了再生混凝土双肢剪力墙的承载力计算式,计算结果与试验结果吻合较好.

In order to know the influence of recycled aggregate on property of seismic performance of the coupled recycled concrete shear wall, a low-frequency quasi-static cyclic loading experimental for four 1/4 scale RC coupled shear wall models with the 1.0 span-height-ratio of lintel beam was carried out. The first model was common concrete coupled shear wall. The replacement of recycled aggregate for the second model was 50% and the third was 100%. The forth was recycled concrete coupled shear wall with concealed bracings. The seismic performance of each coupled shear wall was analyzed. It proved that compared to the RC coupled common wall, the recycled concrete coupled shear wall showed poorer performance, and the more of the coarse aggregate replacement, the poorer the performance of the recycled concrete shear wall. The concealed bracing shear wall showed a good seismic performance. The capacity calculation for recycled concrete coupled shear wall was also established. The calculation results of bearing capacity agreed well with the measured ones.