Research on the Physical Inter-story Drift Ratio and the Damage Evaluation of RC Shear Wall Structures

Based on the analysis of the lateral displacement mode and the deformation composition of shear wall structures, the inter-story displacement is divided into physical inter-story displacement and non-physical inter-story displacement. Then, the calculation method of the physical inter-story displacement of a shear wall in the elastic stage and simplified calculation methods in the elastic-plastic stage are given. On this basis, the proportion of the shear and bending deformations of the shear wall structure are analysed using Perform-3D finite element (FE) software. The variation law of the section rotation angle, the inter-story drift ratio, and the physical inter-story drift ratio along the height of the coupled shear wall and wall limb shear wall structure are analysed. Subsequently, a new dual control damage index of the deformation and energy is proposed, and the damage of the structure is evaluated. The results show that the inter-story drift ratio of the shear wall structure should be controlled by the physical inter-story drift ratio, and the shear displacement should not be ignored in the calculation of the inter-story displacement. The proposed dual control damage index of the deformation and energy can better reflect the damage of the structure.