再生混凝土框架柱抗震性能试验研究

Experimental research on seismic behavior of recycled concrete frame columns

进行了再生粗骨料取代率分别为0%、50%、100%的3个再生混凝土框架柱低周反复荷载的对比试验,在相同轴压比、不同取代率的情况下,对普通混凝土与再生混凝土框架柱、再生混凝土框架柱之间不同取代率的破坏形态、滞回特性、延性性能、耗能特性等问题进行了对比分析。试验结果表明再生混凝土与普通混凝土框架柱的破坏过程相似,前者的滞回特性、延性和耗能均满足抗震要求,因此在有抗震设防要求地区的框架中采用再生混凝土是可行的,但再生混凝土较普通混凝土框架柱构件延性减小,耗能能力降低,不建议直接采用原有设计方法,需进行合理的构造加强措施。

A comparative study is conducted on the seismic behaviors of three recycled concrete frame columns under low cyclic load.The recycled coarse aggregate replacement rates are 0%,50% or 100%.The mechanical characteristics,failure mode,hysteresis loops,ductility and energy dissipation of frame columns with different recycled coarse aggregate replacement rates and same axial compression ratio are comparatively analyzed in this paper.The rule characteristics between ordinary concrete and recycled concrete frame columns is found.The results indicate that the failure process of recycled concrete frame columns is similar to that of ordinary concrete.The seismic behaviors of recycled concrete frame columns,including the ductility etc.,still meet the requirements of earthquake-resistance designing.So it is concluded that the recycled concrete can be applied in concrete structures.Because there are certain deficiencies in its properties,some construction measures must be taken.