Analysis Of Mechanical Behavior Of Reinforced Masonry Structure With External Reinforcement

Masonry structure owning to the relatively low cost,easy to local materials,the better of the fire resistance,good thermal insulation properties and construction operation is simple and so on,which is widely used in countries around the world.But the masonry structure,especially the integrity of the structure without ribs is poor,bearing capacity is relatively low.When the mortar strength is low,the seismic performance that lacks of seismic construction measures is poor.The ability to resist earthquakes is weak,whether it can be used reasonably after the earthquake,whether it can meet the requirements of the existing norms after the seismic strengthening,and it still need to be improved.In China's housing construction the brick masonry structure still occupies a large proportion,but the brick structure of the tensile,bending and shear strength are low,in the event of seismic load can easily lead to brittle damage.Reinforcement of brick masonry with reinforced concrete mortar surface layer can improve the seismic performance of brick masonry structure.Therefore,it is of great practical significance to study the seismic strengthening of reinforced concrete masonry reinforced concrete mortar.And it can be more reasonable to save resources.In this paper reinforced concrete masonry structure is reinforced by reinforced concrete,and the finite element analysis software is used to simulate and analyze the mechanical properties of masonry building before and after reinforcement.Some conclusions are obtained and the theoretical reference is made for practice.The main work of this paper is as follows.1.In this paper the finite element software is used to simulate the prototype structure,and the force behavior of the ribbed masonry wall is analyzed from the side of the open door and the window.The displacement of the skeleton is obtained under different load.This graph reflects the relationship between displacement and force.According to the Mises stress in the masonry model,the ultimate bearing capacity of the ribbed masonry wall is analyzed from the loading scheme-displacement monotonic loading,displacement cycle loading,monotonic loading and periodic loading.The damage location and degree of the masonry structure are determined.2.Based on the finite element model of a wall in the masonry structure,the structural behavior of the structural column-ring beam on the masonry structure is analyzed under the four conditions of horizontal displacement load,horizontal force load,displacement cycle loading and periodic loading And analyzes the relationship between the displacement and the load in the limit state.As well as the influence of material strength,aspect ratio and vertical stress on the ultimate bearing capacity of the wall.3.The stress-strain distribution law of the model under the horizontal load is calculated and compared with the thickness of the reinforced mortar,the spacing of the steel mesh,the strength of the mortar,and the strength of the mortar,The influence of the aspect ratio and the vertical compressive stress on the bearing capacity of the masonry structure.The corresponding suggestions are given.