Analysis On Seismic Performance Of Concrete Rubber Brick Filler Wall And Frame-Structure System

As the industry develops, how to put away the waste tires becomes to be a thorny problemall over the world. Now, the main treatment for the waste tires is putting them in open pile, whilewaste tires are not easy to decompose，leading to “black pollution”. Concrete rubber brick (CRB)is a new type of brick, which is made of the rubber powder that obtained by processing the wastetires. Comparing to traditional concrete, CRB has many virtues, preferable dampingcharacteristic, lower density and better ductility heat and noise insulation. These characteristicscan be used to improve the anti-earthquake performance of frame filler wall structures..Therefore, filler wall that made of CRB can be employed to construct the first defense ofstructures which suffer earthquake, and this technique is very promising.In order to study the properties of CRB, the axis compression test was conducted, andCRB’s constitutive curve was obtained. According to the constitutive curve, young’s modulusand Poisson’s ratio were calculated. When the components in the elastic stage, the integral areaof constitutive curve was modulus of resilience, and when the components in the plastic stage,the integral area of constitutive curve was modulus of toughness. The sum of the modulus ofresilience and toughness was one of the important standards that assess materials’ energyabsorption and consumption. Basing on the constitutive curves of CRB and chamotte masonry,we get the toughness’s modulus of CRB and chamotte bricking-up were0.745MPa and0.35Mpa, separately. In other words, CRB’s is2.13times to the chamotte’s, this result shows theCRB has better shock resistance and the effect of energy absorption. By comparing the capabilityof energy absorbing and dissipation of CRB, fly ash brick and chamotte, the effect of CRB’senergy absorbing and dissipation was obtained.Acceleration time-history analysis of three layers-two span frame filled wall structure wasconducted by ABAQUS. The displacement time-history response of the filler wall structures thatmade of CRB, fly ash brick and chamotte. the structures that lack filler wall in second floor, thetop horizontal displacement of CRB was0.264mm, and this displacement was0.38times fly ashbrick,0.71times chamotte. The result showed that the CRB was better than the other two kindsof bricks at each parameter, by using CRB would increase the seismic performance of structure.Cyclic load test was conducted on a single layer single-span frame, and different wallingmaterials’ dissipation capacity, rigidity degeneration, capacity reduction factor and ductility werecompared. By comparing the energy area we found that CRB’s was1.17times of chamotte’s.Thedissipative coefficient Ceof CRB was1.17times of chamotte’s, and equivalent viscous dampingcoefficient of CRB was1.17times of chamotte’s. The result showed that the CRB masonry haspreferable energy absorption capability. This is because CRB masonry structure has largerenergy absorption ability, and more energy were absorbed, mitigating the damage on structures,thus, anti-earthquake performance was better.Comparing the ductility coefficient of CRB structure and chamotte structure, we got theconclusion that CRB structure’s ductility was better than the chamotte structure (CRB’s ductilityfactor was3.780and chamotte’s ductility factor was2.837), and CRB structures have lowerplastic deformation. The ratio of structural bearing capacity reducing coefficient was αCRB/αchamotte=1.01. The reason was that CRB has greater flexibility and certain amount of energyunder load can be storage in bricks. As the load increases, absorbed energy begin to releasebecause larger elastic deformation. Therefore, the CRB fame filler wall has energy absorbing andconsuming capability, as well as enhanced load bearing capability by employing storage energy.This study proved that the CRB has preferable capability of shock resistance, ductility,plastic deformation capability. By using CRB, the energy absorbing and dissipating capability ofthe structure system can be elevated and the anti-earthquake performance of the frame structurefilled with wall can be significantly ameliorated.