Nonlinear Simulation Analysis On Lateral-resisting Performance Of RC Frame-shear Wall Structure Considering Torsional Effect

he structure will undergo torsional deformation under earthquake action.In China’s seismic codes,the analysis of the torsional action of the RC frame-shear wall structure is carried out by considering the one-way accidental eccentric earthquake action and the two-way earthquake action.This paper mainly studies the lateral resistance of the RC frame-shear wall structure considering the torsion effect,and for this purpose,three new indexes related to its lateral resistance are added:torsion effect coefficient,torsion angle between layers and torsional stiffness between layers.By changing the thickness of the shear wall,three RC frame-shear wall structures with the same plane size but different torsional effect coefficients were used as comparative structures.Different two-way seismic action and one-way accidental eccentric earthquake action were applied to the structure to form 15 Compare models.The finite element simulation of the three-dimensional solid degradation virtual laminated element theory is adopted.From the model’s load-displacement curve,the development process of the interlayer displacement angle,the change characteristics of the interlayer torsion angle,the degradation of the structure’s lateral resistance and torsional rigidity Based on the process and the process of shear force redistribution,the lateral resistance of the structure considering torsion effect is studied.In the process of comparison,the difference between the two-way earthquake action and the one-way accidental eccentric earthquake action,and the influence of the torsional coupling effect on the lateral resistance of the structure in the two-way earthquake action are analyzed,and the corresponding shear redistribution percentage is given.The above research results can provide reference and reference for the seismic design of RC frame-shear wall structure considering torsion effect.In the course of the research,it is clear that the torsion effect coefficient is an important index for analyzing the lateral resistance of the structure considering the torsion effect,and at the same time,the torsion angle and the torsional stiffness between layers are proposed as two new indicators to evaluate the torsional performance of the structure.That is to say,the torsion effect coefficient should be introduced for the redistribution of shear force of the RC frame-shear wall structure considering the torsion effect;the torsion angle between layers is an important indicator for judging the torsion irregularity and seismic deformation.