Evaluation of Nonlinear Seismic Behavior of Reinforced Concrete Flexural Frames with Special Ductility with and without Viscous Dampers on the Floors Level

Subject Areas : Analysis of Structure and Earthquake

siamak barmaki ¹ , ashkan khodabandehlou ²

1 - Department of Civil Engineering, Urmia branch, Islamic Azad University, Urmia, Iran
2 - Department of Civil Engineering, Urmia branch, Islamic Azad University, Urmia, Iran

Received: 2023-06-22 Accepted : 2023-10-12 Published : 2023-12-04

Keywords: Nonlinear Static Analysis, Viscous damper, Modal strain energy, Reinforced concrete moment frame,

Abstract :

The main goal of this research is to evaluate the nonlinear seismic behavior of special RC moment with and without viscous dampers at the floor level. In this research, 2 high-rise three-dimensional RC building frames of 12 and 16 stories, each frame with 8 models, 4 models with and 4 models without viscous damper at the floor level, located in the area with High seismicity on type 3 soil is considered. In order to seismic analysis of frames with and without viscous dampers, nonlinear static analysis method was used according to the second appendix of Iran earthquake regulations, fourth edition. The initial dimensions of the structural elements of the studied frames and the thickness of the roof slabs have been determined in ETABS-V15 and SAFE2014 software, respectively, and finally, modeling, gravity and lateral loading, and nonlinear static analysis of the studied frames have been performed in the SAP2000-V19 software. The results show that the change in the sections of beams and columns from square to rectangle in frames with and without viscous damper causes an increase in the relative lateral displacement of the floors, as well as an increase in the number of openings along the Y axis (model 1 compared to 3), and an increase in the length of the opening along the Y axis (model 1 Compared to 4), in frames with and without viscous damper, it reduces the absolute lateral displacement of floors.