Experimental Research On Seismic Behavior Of Recycled Concrete Frame

How to dispose more and more scrap concrete is a hot potato and need settle urgently for the government of each country. Through falling to pieces, classification and mixing according to certain proportion, the scrap concrete would form recycled concrete aggregate. Using proportion or full recycled concrete aggregate as aggregate to make concrete is one of the effective methods. In order to apply recycled aggregate concrete to structural engineering, tests and theory studies, such as experimental research on seismic behavior of recycled concrete frame, are obligatory. Frame structure is one of the most structural forms in our country now, and frame structures may be take the lead in using cycled concrete. The paper studies seismic behaviors of recycled concrete frames by test.This paper through experiments of five recycled aggregate concrete frames with contain recycled aggregate proportion of 30% , 50% , 100%, and one common concrete frame under low reversed cyclic loads and invariable vertical loads, seismic behavior of recycled concrete frame were studied, such as failure pattern, hysteresis loops, displacement ductility, deterioration of stiffness and energy dissipation etc, and compared with natural concrete frame. The test results show that recycled aggregate concrete frames have well seismic performance, and with the increasing of recycled aggregate proportion, the seismic performances of recycled aggregate concrete frames have not play down obviously. This indicated that recycled aggregate concrete frame apply to practicality engineering is feasible.This paper still through experiments of one recycled aggregate concrete frame with contain recycled aggregate proportion of 50%, and infilled with recycled lightweight masonry blocks under low reversed cyclic loads and invariable vertical loads, seismic behavior of recycled concrete frame infilled with recycled lightweight masonry blocks were studied, such as failure pattern, hysteresis loops, displacement ductility, deterioration of stiffness and energy dissipation etc, and compared with other concrete frames. The test results show that infilled wall and frame cam work together well, stiffness and capacity of resistive horizontal loads of frame are strengthened obviously, but deformation and energy dissipation performance are weakly than other frames, and the influences of infilled wall of frame on main frame structure should arouse attention of designers.Computer simulations on all reinforced concrete frames under low reversed cyclic lateral loading have been performed via ANSYS-a great finite element analysis program-on the basis of non-linear finite element analysis theory on recycled concrete, and compared with test results. The analysises show that it is feasible to...