Paper Title
Structural Analysis of Persian Brick Masonry Domes Stiffened by FRP Under Monotonic Loads

Abstract
In order to investigate the structural behavior of Persian brick masonry domes, three types of semi-circular, (drop, ordinary and raised) four-centered and (drop, ordinary and raised) pointed domes have been studied. The three-dimensional non-linear finite element method using the ANSYS code has been used for analysis. Domes with different thicknesses and spans have been subjected to monotonic concentrated loads up to local failure. Vulnerable zones have been stiffened by FRP strips. Stiffened domes have been again subjected to monotonic loads until local failure. Appropriate failure criteria have been used for prediction of brick and FRP failure. In this paper, Obtained results indicate that increasing the distance between FRP strips and steel plates reduces the value of failure load. For concentrated loads at the two-third of dome height, the best pattern for all domes is placing the FRP strips around the steel plate. In most cases, FRP strips at the left and right sides of the steel plate provide a larger failure load than FRP strips at the top and bottom of the steel plate; with an exception in raised pointed domes. For concentrated loads at the one-third of dome height, the best pattern for all domes is again placing FRP strip around the steel plate. FRP strips at the left and right sides of the steel plate provide a larger failure load than FRP strips at the top and bottom of the steel plate; with an exception in ordinary and raised pointed domes. Keywords - Non-linear structural analysis, Persian brick masonry domes, FRP strips, Stiffened, Monotonic load.