Finite Element Analysis Of The Influence Of Shear Wall On The Mechanical Behavior Of The Joint Of The Column And Beam

At present,the common structure of reinforced concrete frame shear wall has been widely existed in our country.Frame shear wall structure with a large frame structure can be used for the use of space,a variety of flat surface layout and shear wall structure of the strength and stiffness of the lateral force.Frame shear wall structure of shear wall arrangement is more flexible,according to the structure and function of the building demand,frame shear wall structure there are often monolithic shear wall layout,and nodes as a force transfer hub of the building structure,morphology of damage in the earthquake disa ster of ductility and aseismic capacity of the whole building has a important influence.In this paper,the mechanical behavior and failure mechanism of the shear wall,frame column and frame beam are studied in this paper.This paper not only considers the influence of the plate's stress on the nodes,but also considers the influence of the plate boundary condition,which is different from that of the previous research nodes which do not consider the plate or the.Analysis of the shear wall nodes are influenced by the mechanical properties of,seven node models were built to analyze the stress performance of the wall column beam joint.With the same reinforcement rate of different thickness of shear wall and the same shear wall with different thickness of the reinforcement was set up five wall beam column node model,using ABAQUS software simulation analysis and the simulation results comparison of and simulation analysis results and with two pieces of vertical shear wall node model are compared and analyzed.After the analysis of the results,the damage area of the beam end of the wall column beam is strengthened,and the finite element analysis is carried out on the model.Through the above simulation analysis,the following conclusions are drawn:(1)The reinforcement node model analysis,from the beam end 200mm-600 mm zone configuration reinforced net can not only improve the energy performance of the node,the ductility of the structure has a certain growth(2)Through the comparative analysis of the hysteresis loop and the energy dissipation curve,the thickness of the shear wall is larger or smaller,the energy consumption of the node has been reduced.The thickness of the shear wall is less than the ductility,energy consumption is reduced,the thickness of the shear wall is smaller,the bearing capacity of the joint is reduced,and the energy consumption is reduced.(3)The horizontal reinforcement ratio of the shear wall reinforcement is larger,it will speed up the compression damage of the beam which is t he same as the displacement loading direction,the strength of the column is increased and the energy dissipation capacity of the node model is reduced.(4)Nodes arranged two pieces of shear wall,load displacement of shear wall damage is serious,positive beam and side beam damage degree decreased significantly,damage levels due to asymmetric arrangement increases at the bottom of the column,the column end may form plastic hinges.(5)Through the simulation and analysis of the plastic hinge,the plastic hinge is formed at the end of the beam,which is about 400mm-600 mm at the end of the beam.The increase of wall thickness of shear wall and the reinforcement ratio of shear wall are likely to accelerate the damage of structural members,and reduce the safety performance of the building structure.