Loading...

Nonlinear Static and Dynamic Analyses of Steel Moment Resisting Frames with Re-Centering Rocking Wall, Considering Elimination of The Residual Drift

Dehghanian, Seifollah | 2022

194 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54903 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Rahimzadeh Rofooei, Fayaz
  7. Abstract:
  8. This research describes a numerical investigation on a lateral load resisting system comprising of a pin-supported rocking concrete wall coupled with steel moment resisting frames (MRF) models with different support conditions. Two 4 and 8-story structural models are considered for case study analyses with hinged, half-clamped, and clamped support conditions. Fluid viscous dampers (FVDs) are added to the combined system to provide supplemental energy dissipation under the rocking action of the wall. This study aims to compare the efficiency of the proposed system on shear force distribution, residual drift reduction, decreasing the absolute accelerations, as well as comparison of the support conditions of the MRF model. The results of nonlinear static and dynamic analysis using OPENSEES program show that retrofitting the steel frame with rocking wall (RW) results in decreasing the maximum absolute accelerations and inter-story drifts. Post-tensioned rocking wall (PTRW) coupled with viscous dampers has a significant effect on mitigating the residual drifts and nonlinear behavior of the MRF model. Redistribution of story shears indicates that RW as a rigid element transfers the large shears from weak stories to the stories with more lateral stiffness. Therefore, it has an efficient performance in avoiding concentration of shear force and lateral drift in weak stories. Base shear, absolute accelerations and energy absorption capacity are the main parameters which have considerable difference in accordance with support conditions, especially in the case of low-rise building
  9. Keywords:
  10. Nonlinear Static Analysis ; Nonlinear Dynamic Analysis ; Residual Drift ; Inverted Pendulum ; Moment Steel Frames ; Self-Centering ; Nonlinear Time History Analysis ; Post-Tensioned Rocking Wall

 Digital Object List

 Bookmark

No TOC