Experimental And Numerical Analysis Of Reinforced Concrete Block Shear Wall Panels Subjected To Quasi-static Excitations

With development of China’s economy, structural engineering also develops fast,particularly; housing industy has shown a great demond in this development.Meanwhile, reinforced block masonry structures are widely used in the world becauseof their advantage (4savings and1environmental protection), as their good mechanicalproperties and economic benefits and more and more important role in high-risebuildings. In recent years, many countries including China applied this type of concreteblock structure widely. Furthermore, the use of the hollow concrete blocks in seismicregions promotes the higher requirements of the seismic performance made of theconcrete blockworks.Therefore, this thesis conducs the quasi static analysis of reinforced hollowconcrete block masonry shear wall in240mm thickness. The research work includes:(1)the low cyclic loading experiment of3pieces of240;(2) numerical simulation of theseismic failure mode of the shear wall; The experimental study obtains the characteristicload values and the corresponding displacement values of the wall panels as well as thecracking modes and failure loads of the wall panels. The numerical analysis calculatesthe seismic responses of the wall panels using the computing program Ansys, and thenmakes a comparison with the wall panels in190mm thickness. The experimental andnumerical results indicate that the reinforced concrete block walls of240mm thicknesshas a better strenth, stiffness, energy dissipation capacity, ductility performance andbearing capacity than the reinforced block masonry shear wal1of190mm thickness.Based on experimental results, this paper analyzes all kinds of effects on the shearload-bearing capacity of reinforced concrete masonry shear wall, and compares theexperimental results with calculated ones usinf the shear capacity calculation formula inCode for design of masonry structures(GB50003-2001) and Code for design ofconcrete structures(GB50010-2002). The analytical results show that in case of higherhorizontal reinforcement ratio and higher Axial stress, the values calculated by the shearcapacity calculation formula in Code for design of masonry structures(GB50003-2001)is higher than the corresponding experimental results, which tends to unsafe. Therefore,RCBSWS could be used to construct high-rise and super-tall buildings, as it has the shear load-bearing capacity near to that of reinforced concrete shear wall.The results obtained in this thesis, such as restoring force characteristic curves,skeleton curves, stiffness degradation curves, restoring force model, deformation andenergy dissipation capacity, could provide a useful reference to the anti-seismic designof the reinforced block masonry structures.