Study On Seismic Performance Of Reinforced Wall Frames

In 2016,China's anti-earthquake design specifications were revised to significantly increase the seismic design values.When the original structure of seismic performance can not meet new requirements,it is necessary to reinforce the original structure.At present,in the method of adding an anti-lateral force system to reinforce the frame as a whole,the reinforcing substructures are attached to the original structure and cannot be subjected to independent forces.Based on this status quo,this paper proposes the use of wall frame as an independent reinforcement of the overall reinforcement system.This structural system has good energy dissipation performance.It can form a beam hinge mechanism under earthquake to avoid the occurrence of large shear cracks and Brittle destruction situation.In this paper,the study of wall frame shear wall is not only for the needs of engineering design,but also provides a theoretical basis for the further development of relevant specifications.As a universal environment-friendly building material,steel has been widely used in the field of structural reinforcement because of its good plasticity and tensile,bending and torsion resistance,and its short installation period.As a widely used traditional reinforcement method,the outsourcing steel is still used in the current reinforcement field.It has the advantages of simple construction,low workload,small changes in the cross-sectional dimensions of the components,less weight increase,and significant increase in bearing capacity.,The stiffness and ductility of the components have some advantages.This article envisages the use of wall-framed shear walls that are used for reinforcement to enclose steel profiles to increase the bearing capacity and stiffness.This article uses the finite element software ABAQUS to study this.The main research object of this paper is the wall frame shear wall structure,and take one of the spans to study its seismic performance,focusing on the width of the pilaster,the overall height of the wall frame,and the steel rate of the outer wall steel frame.Item influence factors.The work that this article carries out mainly has the following aspects:(1)The development history and research status of the wall frame shear wall are briefly introduced,and the shear mechanism of the concrete structure is introduced.The nonlinear finite element method was used to analyze the shear bearing capacity of the wall frame shear wall.The finite element model was established according to the test.The data was compared with the experimental data,and the true reliability of the finite element simulation was proved..(2)Designing components for different influencing factors of wall frame shear wall structure,and loading and analysis of nine models of ordinary wall frame and 36 models of external steel wall frame are studied.The different influences of the frame structure lay a certain foundation for the further study of the wall frame structure.(3)According to the calculation formula of shear bearing capacity of open-hole shear walls studied by previous researchers,and combining the simulation results of simulated samples in this paper,data fitting was performed to obtain the shear capacity calculation formula of wall-type frame shear walls.(4)According to the research results of this paper,some suggestions for the seismic design of the wall shear wall structure are proposed.(5)Summarizing and summing up the research results,discovering the deficiencies in existing research,and summing up and looking forward.To provide a theoretical basis for the application of wall frame as an independent reinforcement system in actual seismic reinforcement.