Research On Dynamic Characteristics Of Tall Frame-Shear Wall Structures

In this paper, the dynamic characteristics of frame-shear wall structures are analyzed, via the model of the project called SUNSHINE-NEW-LAND, a building in Suzhou. Dynamic characteristic is one of the most important performance index of the tall building. The conceptual design codes of the structure which owns reasonable dynamic performance are set forth, that is rational schematic design, favorable building type and reasonable element design. Based on series of models, the dynamic characteristics of frame-shear wall structure with variable shear wall stiffness are studied. Considering the main four factors of the shear wall, that is wall ratio, hole ratio, concrete strength grade and the shear wall height, which influence the behavior on tall frame-shear wall structures, designing different models and using the Microsoft of PMSAP for calculation, the paper gains groups of internal force, displacement, earthquake force and natural period of vibration. By the results of the models with different wall ratio, hole ratio, concrete strength grade, the law of natural period of vibration and maximum displacement are studied, the practical formulas are worked out through mathematical statistics, regression analysis and linear fitting. By the abundant results of the models with different shear wall heights, the conclusion that the shear wall can be interrupted above the point of inflection is put forward. But the different interruption ratios have different reconstruct measures. When the interruption ratio is 50% approximately, we can design proper transfer floor stiffness to meet the demand of the right code. When the interruption ratio is more than 50% and even up to 100%, we can increase the section size of the frame beam on the floors where the shear wall is interrupted.