Experimental Study on Recycled Aggregate Concrete Frame Structure Model

Abstract:

A frame structure model which was made of recycled aggregate concrete (RAC) with 100% replacement of recycled coarse aggregates was tested on the MTS shaking table. The natural frequency, equivalent stiffness, the damping ratio, the vibration mode, the acceleration response and the displacement response and so on were analyzed and discussed. The result indicates that the damage of the RAC frame model develops progressively; the natural frequency descends; the lateral stiffness degrades; the damping ratio ascends and the acceleration amplifying factor decreases gradually with the increasing earthquake intensity. The inter storey drift was adopted as the index to evaluate the seismic performance of the RAC frame model structure. Although the model was subjected to very severe damage after several earthquakes, it did not collapse after 1.170 g test phase. The results show that the RAC frame buildings have good seismic resistance capacity.

Key words:recycled aggregate concrete(RAC); frame structure; shaking table test; earthquake wave; seismic resistance capacity