The Research Of Seismic Behavior Of Self-insulation Mortarless Reinforced Masonry Shear Walls

Self-insulation mortarless reinforced block masonry shear wall is the integration of the reinforced masonry system,mortarless system and self-insulation system,which gives full use to the advantages of saving template and saving steel of reinforced masonry,at the same time,compared with unreinforced masonry,which has higher strength and ductility,and also reduces the project cost.Mortarless masonry has solved the problem of mortar used in traditional reinforced masonry,such as falling mortar affects construction quality;made construction complicated and with higher requirements of maintenance,which easily affected by the environment;at the same time which required high labour costs.Self-insulation system construction is simple,and it doesn't need to do special insulation construction,which can solve the problem of building structure with heat preservation life and water leakage of wall and so on,and it can also be flexible for a second decoration.Self-insulation mortarless reinforced block masonry shear wall can be a good combination of industrial production,which is a structure with good application and prospective.In order to study the performance of self-insulation mortarless reinforced block masonry shear wall,the seismic performance of the wall was studied.By seven specimens of the self-insulation mortarless reinforced masonry shear walls subjected to low-cyclic test,study the wall under low reciprocating load failure phenomenon,failure mechanism and wall fracture morphology,wall hysteresis curve,stiffness,ductility,energy dissipation capacity,bearing capacity,etc.The walls are mainly bending damage,the cracks are mainly concentrated in the bottom,the common surface and the insulation surface can be maintained when the integrity of the whole,can work well together.The experiment shows that the wall has good strength,stiffness,energy dissipation capacity and ductility,the wall has good seismic performance.Through the comprehensive research of bearing capacity of reinforced masonry both at home and abroad,and the analysis of heat preservation mortar reinforced block masonry shear wall of the bearing capacity,and comparing the calculated formula of masonry structure design code in China,which shows that bearing capacity of wall test in conformity with the specification values calculated It's safe to design the self-insulation mortarless reinforced masonry shear wall with the requirements of the existing reinforced masonry specification.In this paper,the influence of three factors on the bearing capacity and seismic performance of self-insulation mortarless reinforced block masonry shear wall was studied by comparing the three different levels of reinforcement ratio,axial compression ratio and shear span ratio.It is shown that the increase of the horizontal reinforcement ratio only increases the ductility of the wall,and the increase of the axial compression ratio makes the wall bearing capacity increase and the ductility decreases,shear load ratio decreased wall bearing capacity increased significantly.