Non-linear Finite Element Analysis Of The Strengthened RC Columns With Special Shape Based On ANSYS

One main mission for structural engineering is the maintaining for existing structures and the reinforcement and the repair for destroyed structures.Reinforced concrete structure with special-shaped columns is used more and more widely with the satisfactory architectural functions in engineering application.Specially shaped column structure is a new type of structure and there are not enough research on reinforcement of specially shaped column,so it is necessary to take further research,especially for columns with irregular section.With the development of the concrete finite element method,nonlinear analysis with element for reinforcement of specially shaped column is reliable.On one hand,the budget of the experiment and both the time and the labor can be cut with FEM,on the other hand,it's a reference for engineering application.With finite element analysis software-ANSYS,the behavior of reinforcement of specially shaped columns has been analyzed in this paper.It begins with the review of development of specially shaped column and strengthening technology of concrete,and presents a detail instruction about application of finete element software in field of structural engineering.The main tasks in this paper are:(1) By comparing the differences of section feature and mechanical properties between specially shaped column and common rectangular colum,this paper sums up the pros and cons of some reinforcement methods applied in reinforcing RC columns with special shape.From the analysis results,it has good performances while applying wet-enclosing steel and CFRP reinforcement methods in RC columns with special shape.(2) Nonlinear simulation analysis is performed to study the behavior of wet enclosing steel reinforced RC-L columns with finite element software-ANSYS.Some valuable formations can be gained,such as the distribution chart of crack of concrete at some time,the strain distribution of steel and concrete,and the loading-stress curve.Compared with the analysis results and obtained that it has a good performance to reinforce RC column with special shape by wet-enclosing steel reinforcement method.(3) Nonlinear simulation analysis and modal analysis is performed to study the behavior of CFRP reinforced RC-L columns with finite element software-ANSYS.From the finite element analysis results,the vertical bearing capacity and displacement capacity are both enhanced after reinforcement.It has certain creativity that simulation analysis of reinforced RC columns with special shape based on ANSYS.This paper's simulation analysis and results provide reference for further innovation research and engineering application.