Research On Seismic Behavior Of The Composite Structure Built With Masonry Walls And Concrete Shear Walls

In recent years,in order to improve the safety and reliability of the masonry structure,there are many engineering examples have adopted the method of setting part of the masonry wall in the masonry structure as the shear wall.At present,the finite element analysis of this method is less,and mainly focuses on the seismic performance of the whole structure.In order to further understand the co-working process of masonry walls and shear walls in composite structure,so as to provide some reference for the design of such structures.The article firstly obtains the main measures used in designing the composite structure based on the existing literature.Then,the model of composite structures is established by ABAQUS,and the effects of different factors on the distribution and variation of wall forces in composite structure are discussed.Finally,the loading displacement corresponding to different levels of earthquakes is obtained based on the interlayer displacement angle.The deformation and destruction processes of three types of working conditions under different displacement conditions are analyzed.The main conclusions are as follows:(1)The layout of the wall has a significant impact on the mechanical performance of the composite structure.When the stiffness difference between the masonry wall and the shear wall is large,the horizontal forces of various types of walls can be distributed according to the respective stiffness under the symmetrical arrangement.If the asymmetric arrangement is adopted,the walls cannot be well coordinated,which should be avoided in practical engineering.(2)The structural column can improve the mechanical performance of the composite structure to a certain extent.The setting of structural columns can improve the bearing capacity of the wall in the composite structure and slow down the decline of the bearing capacity of the wall in the late loading stage,which is of great significance for ensuring the ductility of the structure and fully exerting the wall performance.(3)After adopting equal stiffness measures,the deformation of the composite structure can meet the requirements of the specification under small and medium earthquakes,and the walls can work well together,but this method is no longer applicable under large earthquakes.(4)Increasing the opening size of the shear wall properly helps to reduce the stiffness gap between walls.After adopting this method,the deformation of the structure can meet the specification requirements under different levels of earthquakes.The two types of walls can work better under the load,and the performance of all kinds of walls can be fully utilized.