Finite Element Analysis Of Seismic Performance Of Adobe Brick Wall Reinforced By Mesh Composite

In recent years,domestic earthquakes have occurred frequently,Due to economic and geographical restrictions,The adobe masonry houses were seriously damaged in previous earthquakes.To reduce the impact of earthquake damage on people’s lives,It is a general trend to carry out seismic design and transformation.GFRP(New Glass Fiber Composite Reinforced Material)is a high-performance composite material that has been widely used.It has the advantages of light weight,high strength,easy construction,strong corrosion resistance and not easy to change the structure.It has been used as a reinforcing material in brick masonry,But there is very little research on adobe masonry houses,And GFRP is of great significance for improving and optimizing the actual design,construction and economic efficiency of adobe masonry buildings.Therefore,this research mainly takes GFRP as the research object to carry out numerical analysis around the seismic performance of the mesh material reinforced adobe wall.Firstly,the compressive tests of adobe bricks,mud test blocks and adobe masonry are carried out.Analyze the relationship between compressive strength and elastic modulus of the three;Secondly,a brief description of the ABAQUS software,Determine the modeling method of the adobe wall,the constitutive relationship of each component and the contact method;Subsequently,the influence of the mesh material reinforced adobe wall on its seismic performance was explored by the method of first configuration and then the fiber ratio;Finally,the influence of the size of the opening,the aspect ratio and the vertical compressive stress on the seismic performance of the mesh material-enhanced adobe wall is analyzed.Combining the above experimental research,numerical simulation and theoretical analysis,the following conclusions are drawn:(1)The expression between compressive strength and elastic modulus is obtained by overall fitting the three compressive test data,The main line is that the compression deformation of the adobe masonry is equal to the deformation of the adobe brick plus the deformation of the mud.The theory derives the relationship between the three compressive strengths and the relationship between the elastic modulus.(2)Laying a mesh material with a certain fiber distribution ratio in the horizontal mortar seam of the adobe wall can increase the bearing capacity,deformability and improve the failure mode of the adobe wall.And when the configuration method is one-brick configuration,When the fiber distribution rate is about 0.338,The enhancement effect is good.(3)As the opening of the hole becomes larger,The bearing capacity of the wall is reduced,Stiffness decreases,However,the displayed plastic deformation capacity has been improved.The reinforced adobe wall with smaller height and width has higher lateral bearing capacity,The plasticity demonstrated is strong.The vertical compressive stress has a greater influence on the connection of each component of the structure,The larger the value,The utilization rate of mesh material increases,The tensile properties of the mesh material are fully utilized.