Finite Element Analysis On Seismic Performance Of Large-size High-strength Concrete Short Column By Steel Mesh Constraint

In the era of continuous development of science and technology,the scale of urban construction is constantly expanding,and the height is constantly refreshed,and the requirement for building materials is also increasing.In order to meet the needs of urban construction,concrete materials are constantly developing and innovating,and new concrete materials are being widely used in urban construction.Among them,the large size and high strength concrete materials with its great advantages such as high capacity to become the development trend of building materials in the future.But at the same time,the disadvantage of its poor ductility and brittleness is also obvious,therefore,finding out a scientific and reasonable design method to improve the ductility of high strength concrete structural members is a problem that the engineering construction industry is constantly exploring,which is concerned by the engineering community.At present,there are two measures to take the high strength concrete,one is the structure itself of the high strength constraints,that is,to increase the strength of the concrete constraints,so that it is more reasonable stress and to avoid premature brittle failure,the other is the seismic strengthening method,through the reasonable technical means,to strengthen the high strength concrete and reinforcement treatment.On the basis of fully analyzing and grasping the measures of high strength concrete,this paper puts forward a new method of-steel plate mesh method,which is used to restrain the high strength concrete.The solid model was established by the finite element software ABAQUS on the basis of the test of the large size ordinary concrete short columns,finite element analysis of large size ordinary concrete short columns under low reversed cyclic loading,study and analysis the bearing capacity and seismic behavior of large size ordinary concrete short columns with different damage states.And then using ABAQUS finite element analysis software to analysis large size and high strength failure characteristics and seismic performance of reinforced concrete short columns and the constraints of large size high strength steel net failure characteristics and seismic performance of reinforced concrete short columns.Based on the correctness of the large size ordinary concrete short column finite element model and the characteristics of strong brittleness of high-strength concrete,ABAQUS software simulation was used to analyze the seismic performance of the large size steel net constraints high-strength concrete short columns,reveal the destruction mechanism of large size high strength concrete short column under the effect of XPM constraint,and study the steel mesh on damage characteristics of large size high strength concrete short column,bearing capacity,hysteresis property,energy dissipation and seismic performance.Through the analysis of the steel mesh constraints of large size high strength concrete short column simulation: compared to large size ordinary concrete and high strength concrete short column,plate mesh is slightly different,and there is no premature brittle failure and the failure rate is small;Due to the constraint of steel plate mesh,the disadvantages of large size and high strength concrete are overcome,and the existence of steel mesh network can effectively improve the seismic performance of high strength and high strength concrete short columns.