Nonlinear Simulation Analysis Of Laterall Resistance Of Wood Frame Shear Wall Structure

With the development of economy and society,many countries have begun to realize the serious impact of the serious consumption of resources and the increasing pollution of the environment on the ecology and human beings.Therefore,Western governments,including the United States and the European Union,have begun to vigorously promote green building.China has also introduced a series of policies to promote the development of green building.Wood has the advantages of natural renewable,good physical performance,excellent processing performance and so on.It is a kind of high quality ecological building material with broad development prospect and can replace the traditional building materials.Wood structure has a long history in China,but the research on modern new type of wood structure is still lack of systematicness,and the simulation analysis of wood frame shear wall structure is rarely studied.In this paper,two groups of four-story wood-frame shear wall models are established by using VFEAP program.The effects of characteristic stiffness(initial shear sharing ratio)and axial compression ratio are considered in the two groups of models.Considering that the initial shear sharing ratio of the frame is 4.2%,8.0% and 11.3%,respectively,the model of the stiffness eigenvalue group was analyzed by finite element simulation,and the load-displacement curve,floor displacement curve,interstorey displacement Angle curve,stiffness degradation curve and shear redistribution curve were obtained.The results show that the larger the stiffness characteristic value(the initial shear sharing ratio of the frame)is,the higher the ultimate bearing capacity and displacement of the wood-frame shear wall structure are,and the smaller the displacement Angle between floors is.The shear redistribution phenomenon of the structure weakens with the increase of the floor,but strengthens with the increase of the stiffness characteristic value.The maximum axial compression ratios of the frame(shear wall)in the axial compression ratio group are 0.17(0.11),0.24(0.15)and 0.36(0.16),respectively.The finite element analysis shows that the larger the axial compression ratio is,the smaller the ultimate load and displacement of the wood-frame shear wall structure will be,the larger the displacement Angle of the floor frame will be,and the stronger the shear redistribution phenomenon will be.After the above research,a case study of the actual test of a wooden beam is carried out,and the results show that the finite element method presented in this paper has a good simulation effect.Based on the finite element simulation analysis of the timber frame-shear wall structure,it can be seen that the characteristic stiffness value and axial compression ratio have significant effects on the lateral resistance of the structure.This study enriches the theory of wood structure and can provide reference for the research and development of wood structure in the future.