Earthquake Simulation Test On Recycled Concrete Shear Wall With Different Aspect Ratio

In order to promote the utilization of waste concrete, the study of recycledconcrete component and structure has become an urgent need of the project.Nowadays, the study of recycled concrete component and structure mainly focused onstatic test, but the shaking table test of recycled concrete is still very less. In this paper,7recycled concrete shear walls with different aspect ratio were tested on shaking table.Main contributions are as follows:1. The shaking table tests of5low-rise shear walls with aspect ratio of1.0werecarried out, the scale ratio is1/3and the design parameters including recycledaggregate replacement ratio, the ratio of reinforcement and reinforcement style. Oneof the models with reinforcement ratio of0.25%was made by natural concrete, andone with reinforcement ratio of0.25%was made by recycled coarse aggregateconcrete, one with reinforcement ratio of0.25%was made by recycled concreteinclude100%recycled coarse and fine aggregate, and one with reinforcement ratio of0.46%was made by recycled concrete include100%recycled coarse and fineaggregate, and one with concealed bracings and reinforcement ratio of0.46%wasmade by recycled concrete include100%recycled coarse and fine aggregate. Thefrequencies, acceleration responses and maximum displacement responses were testedat every stage, and the impacts of aggregate replacement and reinforcement style onthe vibration characteristics, seismic performance and failure characteristics oflow-rise recycled concrete shear wall were analyzed and compared.2. The shaking table tests of2high-rise shear walls with aspect ratio of2.3werecarried out and the scale ratio is1/3. One of the models was made by natural concrete,and the other was made by recycled concrete include100%recycled coarse and fineaggregate. The frequencies, acceleration responses and maximum displacementresponses of the2models were tested at every stage, and the impacts of aggregatereplacement on vibration characteristics, seismic performance and failurecharacteristics of high-rise recycled concrete shear wall were analyzed and compared.3. By the finite element software ABAQUS, finite element model of recycledconcrete shear wall with different aspect ratio were made and the finite elementcalculation were carried out. The calculation included frequencies and maximum acceleration responses in elastic stage and elastic-plastic stage, and the calculationresults are in good agreement with the measured ones.The main conclusions and suggestion:1. Compared with natural low-rise concrete shear wall，the seismic performanceof the low-rise concrete shear wall with100%recycled coarse and fine aggregatedeclines more， the seismic performance of low-rise recycled coarse aggregateconcrete shear wall is close to that of the natural concrete shear wall, and it can beapplied in practical engineering.2. The concealed bracing can enable the seismic performance of low-riserecycled aggregate concrete shear walls reach the level of the natural concrete shearwall and it can be applied in practical engineering.3. The seismic performance of high-rise recycled concrete shear wall is worsethan that of the natural concrete shear wall. It is suggested that recycled coarseaggregate shear walls with better seismic performance can be applied in practicalengineering.