Loading...

Evaluation of the Effects of the Flanges on the Strength and the Failure Modes of Masonry Walls

Enami Alamdari, Babak | 2020

450 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53289 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Mohtasham Dolatshahi, Kiarash
  7. Abstract:
  8. Most of the previous studies as well as codes regarding unreinforced masonry walls overlook the effects of perpendicular walls – called flanges – on their behavior; in reality, these transversal walls significantly affect ultimate strength, stiffness, drift capacity, and most importantly the failure modes. In this thesis, numerical finite element modeling was employed in order to investigate the impact of flanges on unreinforced masonry walls subjected to gravity loads and lateral pushover excitation. Moreover, a sensitivity analysis was conducted concerning the effect of different boundary conditions and axial load ratios on failure mode and crack pattern of the flanged walls. First, the numerical model was validated through reproducing the results of a series of actual experimental tests carried out by other researchers. Afterward, models of flanged walls with I- and C-shaped flange configurations were created and analyzed with the program Abaqus. Ultimately, a nonlinear genetic optimization was performed to propose new equations for ultimate strength and stiffness of unreinforced masonry flanged-walls with regard to different failure modes and boundary conditions. The extracted equations were then compared to those available in American Society of Civil Engineers (ASCE 41) code, showing a remarkable higher accuracy
  9. Keywords:
  10. Numerical Modeling ; Nonlinear Optimization ; Masonry Buildings ; Transversal Walls ; Failure Modes ; Cyclic Loading

 Digital Object List

 Bookmark

No TOC