The Seismic Performance Analyslis Of Short Leg Shear Wall In Concrete Structure

As a unique structural system in our country,the short leg shear wall structure is widely favored by engineering applications due to its diverse forms and flexible layout.With the development of science and technology in all aspects of our country,the technology of ordinary short leg shear walls has become increasingly mature,and a new type of short-limbed shear wall with built-in steel short-leg shear walls has emerged.The placement of section steel in the wall limb has an important effect on its own seismic performance index.Considering that the earthquake will generate uncertain seismic forces when it comes,it will produce undetermined directional effects on different types of steel reinforced concrete short-limb shear walls.In this paper,finite element software is used to numerically simulate the short-leg shear wall in the form of L-shaped cross section,and to study the performance changes of different types of wall legs under the action of earthquake.In this paper,the ordinary reinforced concrete short leg shear wall with Lshaped section is designed,and the I-shaped steel is placed at the end of the wall limb and three short leg shear walls with solid web steel are arranged on the wall limb.Firstly,the numerical simulation of the three short leg shear walls is carried out by using the finite element analysis software ABAQUS to analyze the stress of the three short leg shear walls under monotonic load and low cycle repeated load Force performance and its seismic performance are studied;Then,the influence of different axial compression ratio and concrete strength grade on the seismic performance of the built-in solid belt steel short leg shear wall is analyzed and compared.The simulation results show that adding steel to the ordinary short leg shear wall can improve the bearing capacity of the wall limb,improve the deformation capacity of the wall limb,and benefit the seismic performance of the structure;the axial compression ratio of the wall limb is important for the seismic performance of the solid web steel short leg shear wall When the axial compression ratio increases,the bearing capacity of the wall limb will increase,while the deformation capacity and energy consumption capacity of the wall limb will decrease with the increase of the axial compression ratio.In the structural design,in order to make the structure more earthquake resistant,the axial compression ratio can be controlled within the range of 0.2-0.3.The concrete strength is one of the important factors affecting the built-in solid web steel short leg shear wall,with the increase of the concrete strength As a result,the bearing capacity,ductility and energy dissipation capacity of the short leg shear wall become larger and lower.Therefore,the seismic effect of different factors should be considered in the actual structural design.