Finite Element Analysis Of Steel-polyvinyl Alcohol Hybrid Fiber Cored Concrete Shear Wall

Nowadays,with the advancement of science and technology,the development of the construction industry is also prospering.How to improve the performance of high-rise building structures to meet people’s increasing housing demand has become an important research content of domestic and foreign scholars and researchers in recent years.Reinforced concrete shear walls have greater rigidity,can significantly reduce structural lateral displacement,and have good seismic performance.Therefore,such shear walls are widely used in urban construction.Steel bars and concrete are still the main components of building components.Although concrete shear walls have superior compressive resistance,their high self-weight and poor ductility have always been very serious problems in the field of construction engineering.Many scholars at home and abroad have proposed The metal fiber or organic fiber with good ductility is mixed into the shear wall to prove whether it has a positive effect on its ductility.On the other hand,holes are reserved inside the wall to reduce the weight of the wall,and it can also achieve the effect of heat preservation and energy saving.So far,there are relatively few researches on hybrid fiber reinforced concrete shear walls,and there are few results of nonlinear finite element analysis of fiber reinforced concrete shear walls.This paper performs a nonlinear finite element analysis of a mixed fiber hollow concrete shear wall based on previous studies,discusses the influence of the different content of hybrid fiber on the seismic performance of the shear wall,and hopes that it will have a certain impact on the actual engineering in the future.s help.This paper uses the finite element software ABAQUS to establish various proportions of the steel and PVA hybrid fiber concrete hollow shear wall model,and compares and analyzes the skeleton curve of the shear wall,failure pattern and seismic performance,and the change of different parameters on one-way nappe when loading the damage form of shear wall stress behavior,ductility,bearing capacity,etc.The main research contents are as follows:(1)The test specimen of the core-filled shear wall with reserved holes in the existing literature is referred to as the simulation object,and the model is modeled on this basis,the finite element analysis result is output,Then,the bearing capacity data obtained from the test is compared and analyzed with the simulation data.Checking the effectiveness of modeling process and software analysis.(2)5 pieces of hollow shear wall model,one piece of shear wall is common concrete shear wall,a comparative analysis of hybrid fiber but the other four slices of shear wall is joining the different proportion of shear wall,to reciprocating load test,Perform simulation analysis of various shear wall failure modes,skeletal curves,ductile performance,and more.The results show that the ductility of the hollow shear wall is better as the number of blended fibers increases within a certain range.The mechanical properties were also improved,and the optimum mixing ratio of the mixed fibers was determined.(3)Based on a hybrid fiber hollow concrete shear wall model in Chapter 3,the loading mode is changed to monotonic pushover loading,and whether the performance of the shear wall will be affected when the axial compression ratio,reinforcement ratio and hole ratio are changed respectively is discussed.The reasonable selection range of axial compression ratio is obtained from the analysis data.The axial compression ratio is proportional to the bearing capacity of the shear wall.Increasing the reinforcement of the wall increases the bearing capacity and improves the deformation capacity of the shear wall.Increasing the cavity ratio can improve the ductility of the wall,but reduce the bearing capacity,which can meet the seismic requirements.(4)The normal section bearing capacity and yield displacement of the hybrid fiber hollow concrete shear wall are calculated theoretically,and the results are compared with the simulation values.The results show that the calculation accuracy is proved within the reasonable error range.