| Recycled concrete is a new kind of concrete,it is made by using recycled aggregates which obtained from abandoned concrete after cracking,crushing,cleaning and screen entirely or partially replace natural aggregates. Recycled concrete technology can well solve the antinomy between abandoned aggregate and the shot of natural sand and gravel resources, also, it means great for reducing production costs and protecting of the urban environment. The application of recycled concrete technologies will bring significant social, economic and environmental benefits, recycled concrete technologies has become common research topics in many developed countries and some developing countries, it is considered as one of the primary measures to develop green concrete in the 21st century.Based on contrast experiment of two natural aggregate concrete beams and two recycled aggregate concrete beams under low reversed cyclic torque load, distribution of cracks, failure pattern, hysteresis curve, skeleton curve, ductility, dissipation of energy and stiffness degradation are studied systematically, also, forces of natural aggregate concrete beams and recycled aggregate concrete beams are simulated through non-linear finite element analysis method. Studies show that recycled aggregate concrete beams have benign seismic performance. |
