Research On Axial Compression Performance Of RC Column Strengthened With Ribbed Steel Tube Self-compacting Concrete

Along with the rapid development of construction industry,facing the whole country at present a large number of use fixed number of year of close to design houses,many buildings exist post-disaster restoration function change site protection,therefore,seeking a good reinforcement method is very important.In this paper,numerical simulation and experimental research are combined to optimize a reinforcement method based on the concrete filled steel tube reinforcement method The RC column strengthened with self-compacting concrete of ribbed steel tube is characterized by the combination of the advantages of self-compacting concrete and ribbed steel tube,which can better solve the problems of restricted section size and excessive construction difficulty in some current engineering practice.In order to study the axial compression performance of RC column strengthened with ribbed steel tube self-compacting concrete,the following work and conclusions are completed:1.The research status of RC column reinforced with ribbed steel tube self-compacting concrete is introduced in detail.The process of test and numerical simulation is analyzed,and the accuracy of numerical simulation is verified by the test curve.2.Designed eight specimens,including a strengthened RC column,an enlarged cross section method is used to RC column,six RC columns strengthened with ribbed self-compacting concrete filled steel tube,analyzes the different parameters of the self-compacting concrete strength steel tube wall thickness different ways of strengthening rib plate opening interface treatment on the properties of reinforced column axial compression By experiment shows: the original column strengthened with ribbed self-compacting concrete filled steel tube,the bearing stiffness ductility are promoted,and lift.3.Establish 23 finite element models,mainly analyze rib size,self-compacting concrete strength,steel pipe wall thickness,reinforcement method,slenderness ratio,cross-section size,rib opening and ribbed steel pipe self-compacting concrete reinforced RC column axial compression The impact of performance is mainly obtained by load-displacement curve,failure form and stress distribution,energy dissipation,ductility and axial compression performance indicators.The analysis shows that: rib size,self-compacting concrete strength,steel pipe wall thickness,reinforcement method,slenderness ratio,and cross-sectional size have a greater influence on the bearing capacity of reinforced columns;as the rib size and steel pipe wall thickness increase,the energy consumption coefficient increases,The increase in self-compacting concrete strength,slenderness ratio,cross-sectional size,and rib openings decreases;with the increase in rib size,steel pipe wall thickness,cross-section size,and rib openings,it increases,but for the cross-sectional size The ductility coefficient of self-compacting concrete will slow down or decrease if the increase of the opening of the rib exceeds a certain amount,while the ductility coefficient of the self-compacting concrete increases with the increase of the slenderness ratio.