Elasto - Plastic Time - History Analysis Of Frame - Shear Structure Considering Shear Effect

Frame shear wall structure combines the advantages of the framework and shear wall structure. The structure has flexible arrangement. The story lateral stiffness and lateral load-bearing capacity is stronger than frame structures’. The seismic behavior of frame shear wall structure reduces the damage of construction, widely used in real life. It is very important for the analysis of seismic performance of frame shear wall structure.This article makes some appropriate changes to the model of fiber method and the finite element flexibility method. The traditional fiber model of the beam and column elements only consider the axial force and bending moment at the section of structures. The analysis of shear wall structure use the fiber model considering shear effect. The iterative process of frame shear wall structure use Newton-Rapson method. The iterative process of the negative stiffness structures uses Riks method. Using precise time integration method solves the dynamic time-history analysis for structures. The seismic performance of the structure analyzed by the program GFORT that written by FORTRAN language.Two Frame shear wall structures are designed in this paper, one is single span and four stories, the other is two span and four stories. There are two methods, separately using the GFORT program and the finite element software Ansys, to analyze the structures dynamic time-history analysis. Through two results of the structural displacement time history curves, the results show that the rationality of the program GFORT is validated. The two span and four stories structure under minor, moderate and major earthquake action is analyzed to get the structures’ top displacement, story lateral, story drift angle and base shear by the program. The results validate the model satisfies the seismic design requirements. The seismic analysis is discussed with different damping ratio of the model. Seismic capacity of the building enhance along with the damping ratio increase appropriately. The frame shear wall structure with regular shape does not consider the effect of torque. The tests indicate that the result of the comparison of displacement responses to earthquake loading in single and double propagation directions is not too distinctive.