改性再生混凝土角节点抗震性能试验研究

Research on seismic behavior of modified recycled aggregate concrete frame knee-joints

通过对再生混凝土进行改性处理,制作出了再生粗骨料取代率为100%、粉煤灰取代率分别为15%和0%(取代水泥)的两榀框架角节点,并对其进行了低周反复荷载作用下的试验研究。对模拟地震作用下得到的滞回曲线、刚度退化曲线、延性及耗能曲线进行了对比。结果表明,适量的改性再生混凝土能够满足抗震性能要求,可应用于实际工程中。

The recycled aggregate concrete was modified to make two frame knee-joints joints with recycled coarse aggregate replacement rate of 100% and fly ash replacement rates of 15% and 0% （replacing cement） , and tested under low cyclic loading, the hysteretic curves, stiffness degradation curves, ductility and energy dissipation curves were compared based on simulated earthquake action. The results show that the recycled aggrigate concrete with an appropriate amount of modification can meet the requirements for seismic performance, and can be applied to practical engineering.