| The special-shaped column(specially shaped column)is the abbreviation of the special-shaped section column.The so-called "heteromorphic cross section" refers to the difference between the geometric shape of the column section and the common rectangular cross section.A special-shaped column refers to a column with a cross section of a L,T and a cross section,and the height of the limbs of each limb is more than 4.It evolves from shear walls,short shear walls and frame structures,which can be used for reference and different places with their design.Practice has proved that the special-shaped column can effectively avoid the bulge edges and corners of buildings,increase the effective utilization area of the rooms,effectively reduce the weight of the building structure,and make the structural layout of the building more beautiful.Although the special-shaped column has many advantages,experts and scholars have made some achievements in the study of the mechanical properties of special-shaped columns.However,the research on eccentric compression of special-shaped columns is relatively few.In recent years,with the popularization and application of steel reinforced concrete special-shaped column structure system,research on the special-shaped column structure has become a hot research topic in the field of concrete structures at home and abroad,so it has very important significance of Applied Research of columns on the actual project.Due to the wide application of reinforced concrete special-shaped column structure system,the exploration and research of reinforced concrete special-shaped column structure system has become an important research topic.In order to carry out the research on the mechanical properties of reinforced concrete columns under eccentric compression under the action,after the first step of finite element in steel reinforced concrete special-shaped column to establish relevant literature model,analyze and verify the correctness of the model established,on the basis of the above is verified by the simulation and analysis of a large number of different component test factor,focuses on the research on the effects of limb length ratio,eccentricity,concrete strength,limb length ratio of thickness of these four kinds of influence of parameters on the mechanical properties of reinforced concrete special-shaped column of bias.The main contents and conclusions are as follows:1.By using the finite element analysis software ABAQUS,according to the experimental data in relevant literature,the finite element model of reinforced concrete special-shaped columns is established,and the accuracy of the model establishment is verified by verifying the load displacement curve and ultimate bearing capacity after testing.2.In the foundation of analysis verify the correctness of the finite element model,design of the cross-section of steel reinforced concrete special-shaped column,set the relevant parameters of the specimen,determine each condition to test parameters,studied and established the finite element model,different eccentric distance,loading angle,the strength grade of concrete and the ratio of reinforcement of the structure under concrete stress cloud map,steel stress cloud map and load-displacement curves;3.The equivalent stress nephogram,load deflection curve and the change of ultimate bearing capacity and failure modes of special-shaped columns under different working conditions are compared and analyzed.The influence rules of the special-shaped columns under uniaxial biasing pressure under the above four conditions are determined. |
