Study On Mechanical Behavior Of Bonded Sliding Stress Concrete Joints

The steel reinforced concrete structure has existing steel members,reinforced steel and concrete components.The steel reinforced concrete structure has advantages that other structures cannot match.Steel reinforced concrete has a high bearing capacity.At the same time,the seismic energy-consuming capacity is also outstanding.The steel-concrete structure is very suitable for buildings with high seismic requirements.In the steel reinforced concrete frame,the node is an important part of the structure.It links the beams and columns in the structure.Ensure that the internal forces in the structure can be smoothly transmitted.In steel reinforced concrete structures,the interaction between steel and concrete has always been a hot topic of research.The study of the relationship between the bonding of steel and concrete has important implications for the further study of the mechanical properties and bearing capacity of steel reinforced concrete joints.This article uses ANSYS software to establish the finite element model for the steel reinforced concrete frame joints.And in this paper,a non-linear(corresponding unit is Combination 39)spring-performance unit is used to simulate the interaction between the concrete in the frame joints and the profile steel in the frame joints.Then ANSYS software was used to perform nonlinear finite element analysis on the ultimate load-carrying capacity of steel and concrete frame joints in one direction.In the first case,the bond slip properties between the two materials are included in the model when the concrete and steel are modeled;in the other case,the bond slip between the concrete and the steel is not considered during the modeling.At the same time,with reference to the existing one-way static loading experiment of steel reinforced concrete frame joints,the existing experiments were simulated by ANSYS,and the parameters of the spring unit were systematically summarized,the modeling method was summarized,and the results of the finite element model and the existing experimental results were compared.The rationality of the ANSYS finite element model,the use of two models to further study the ultimate bearing capacity of steel reinforced concrete frame joints under different material strength.Through the research,it was shown that the maximum horizontal thrust force that the steel reinforced concrete frame joints can withstand when considering the bonding between concrete and steel is not considered in the finite element simulation.It is the maximum that the steel reinforced concrete frame joint can bear when considering the bonding between concrete and steel.Horizontal thrust is large.The difference between the finite element simulation value and the actual experimental value considering the bonding effect is smaller than the finite element simulation value considering the bonding effect.The finite element simulation value considering the bonding effect is closer to the actual situation.The greater the strength of concrete,the greater the strength of steel,considering the bonding of concrete and steel and regardless of the bonding of concrete and steel,steel reinforced concrete frame joints can withstand the maximum horizontal thrust greater.