Study On Seismic Behavior Of Short-Leg Shear Walls With Different Cross-Sections

With the continuous emergence of high-rise buildings,short-leg shear wall structure also arises at the historic moment.In order to study the seismic behavior of short-leg shear walls with different cross sections,12 short-leg shear walls were designed.the large-scale finite element analysis software ABAQUS was used to simulate the failure of the specimens under monotonic load and cyclic load.The main tasks are as follows:(1)this paper simulates the failure process of a “—”shaped,“T” shaped and “L”shaped common short-leg shear wall under monotonic load when the ratio of height to thickness,reinforcement ratio,concrete strength and reinforcement grade are the same.by analyzing stress moire pattern and load displacement curve,it is found that diagonal compression zone is formed at the loading point and fixed end of each component.the difference of bearing capacity of common short-leg shear wall is not large when the section form is different,but the ductility of common short-leg shear wall is the worst.(2)in this paper,“—”shaped,“T” shaped and “L” shaped short-leg shear walls with built-in section steel are simulated.under the condition of the same steel ratio,through the failure simulation of specimens under monotonic load,it is found that the bearing capacity of common short-leg shear walls with different cross-section forms is lower than that of short-leg shear walls with built-in section steel;The stress distribution and ductility of short-leg shear wall with built-in section steel are uniform.The bearing capacity of l-shaped short-leg shear wall with built-in section steel is the highest,t-shaped is the second,and the bearing capacity of I-shaped section is the lowest.(3)in this paper,the failure of “—” shaped,“T” shaped,“L” shaped ordinary short-leg shear wall and built-in steel short-leg shear wall under low cyclic loading is simulated,and the hysteretic curves of each component are analyzed.it is found that the base shear force of ordinary short-leg shear wall with different cross-section forms is larger at the initial stage of loading.after repeated cyclic loading and unloading,the base shear force decreases and tends to be stable.The hysteretic curves of short-leg shear walls with built-in steel sections are full,the energy dissipation capacity of the members is stronger,the peak value of the curve skeleton is larger,and the bearing capacity is higher.The load displacement curve of short-leg shear wall is straight in the process of loading and unloading.The hysteretic curves of the specimens are basically symmetrical when loaded in the positive and negative directions.The hysteretic curve of short-leg shear wall with steel embedded init is close to that of steel plate shear wall.In this paper,the finite element analysis software ABAQUS is used to simulate the failure modes of common short-leg shear wall and built-in steel short-leg shear wall under seismic load,and the influence of section form and steel on the seismic performance of short-leg shear wall is studied,which provides a reference for architectural engineering design.