Seismic Behavior Of Slit Reinforced Concrete Wall In Frames

The results of seismic damage shows that,collapse of buildings is the main reason causing casualties and property losses.For multi-story reinforced concrete frame structure,the damage of infilled wall is the direct reason.It will significantly improve the resistant capability of the whole structure to collapse and reduce the losses,it can not only improve the structure of the collapse resistance,but also can reduce some property losses and casualties,if equipped with a small amount of reinforced concrete wall be used to replace the traditional masonry wall.And,it is damaged ahead of the main structure,having the effect of protection for the main frame structure.The main function of "infilled wall" is "partition",not affecting the force condition of main body structure.We should not affect the design of "strong column and weak beam" in the frame structure as far as possible.On the basis of the team’s existing research work,this paper carries out further research and exploration.The main work includes:1.Two plain concrete specimens with different length of vertical joints were designed to study the effects of length of vertical joints on horizontal bearing capacity,ductility and energy dissipation capacity of the specimens.2.In order to protect the columns on both sides of the wall,two specimens corresponding to two different wall stiffness weakening schemes were designed to determine a reasonable form of vertical joint opening.3.Four ribbed specimens were designed to study the influence of distribution form and length of ribbed bars on fracture development,bearing capacity,ductility and energy dissipation capacity.The results show that:1.The initial stiffness,horizontal bearing capacity,energy dissipation capacity and deformation capacity of concrete wall specimens with open vertical joints are easily affected by the ratio of reinforcement and the form of reinforcement.2.This method can not only effectively reduce the cracks in the frame column,but also enhance the ductility and energy dissipation of the specimen.3.The longer the vertical slots are,the lower the horizontal bearing capacity and energy dissipation capacity are;But plastic deformation capacity is better.