The Effect of Different Methods of Filling the Openings Located in the Peripheral Tube by Steel Plate Shear Walls on the Seismic Behavior of Tall Steel Framed Tube Buildings

نوع: Type: thesis

مقطع: Segment: masters

عنوان: Title: The Effect of Different Methods of Filling the Openings Located in the Peripheral Tube by Steel Plate Shear Walls on the Seismic Behavior of Tall Steel Framed Tube Buildings

ارائه دهنده: Provider: Mohammadreza Shayganihonar

اساتید راهنما: Supervisors: Mostafa Moghadasi (Ph.D)

اساتید مشاور: Advisory Professors:

اساتید ممتحن یا داور: Examining professors or referees: Dr Ferydoon Rezaei - Dr Amir reza Sameti

زمان و تاریخ ارائه: Time and date of presentation: 2023 - jan 30

مکان ارائه: Place of presentation: Seminar 2

چکیده: Abstract: High-rise buildings are the result of population increase, expansion of cities and development of urbanization. With the invention of tubular structural system in tall buildings by Fazlur Khan, the design and implementation of tall buildings underwent a serious transformation. Despite the passing of years and the creation of new structural systems, the tubular system is always the focus of design engineers due to its high structural efficiency, simplicity in implementation and no need for advanced equipment. One of the main disadvantages of the tube system is the existence of the phenomenon of shear lag in this system, which limits the maximum use of the stiffness and resistance capacity of the structure, and this reduces the efficiency of the system, and finally, the cross-section capacity is not used optimally. In this research, the effect of different methods of filling the openings located in the peripheral tube by means of steel plate shear walls on the seismic behavior of tall steel framed tube buildings has been investigated. 27 buildings have been analyzed for this research. The buildings are arranged in three heights of 24, 37, and 50 floors, and in each height, eight patterns are used to represent the changes in height and patterns. The models are designed in three dimensions and based on the 4 edition of the 2800 standard, and then their seismic behavior has been evaluated using static and dynamic nonlinear analyzes in Sap 2000 software. In this research, the effect of different methods of filling the openings located in the peripheral tube by means of steel plate shear walls on parameters such as floor drift ratio, lateral displacement and base shear in step such as target displacement in nonlinear static analysis (pushover) and on parameters such as The drift ratio of the floors, the maximum displacement of the center of mass of the roof and the maximum values of the base shears under the effect of different earthquakes were investigated in the nonlinear dynamic analysis (nonlinear time history). In all the models of this research, the values of the drift ratio of the floors are within the range suggested by code of practice. From the results of the analysis of the models, it can be concluded that The use of steel plate shear walls in the outer wall of the tube system reduces the shear lag. The type of arrangement of shear walls in the outer wall of the tube system has a great effect on reducing shear lag. It was also observed that with the increase in height, adding a shear wall does not have much effect on reducing the shear lag, but adding a shear wall in the 24-story model has a significant effect on reducing the shear lag. Among the models of this thesis, TSP4Tt and TSP4X models have the best performance in the field of seismic parameters, respectively. Of course, in models 24 floors, with 24TSP2Tt and 24TSP2X models The use of two shear walls in each direction has had an acceptable performance

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