Explore chapters and articles related to this topic
Seismic response of an unreinforced masonry building with structural irregularity; Blind prediction by means of pushover analysis
Published in Jan Kubica, Arkadiusz Kwiecień, Łukasz Bednarz, Brick and Block Masonry - From Historical to Sustainable Masonry, 2020
A. Aşıkoğlu, G. Vasconcelos, P.B. Lourenço, A. Del Re
Seismic behavior of masonry buildings highly dependent on the direction of the horizontal loading due to the fact that the resistance capacity of the loadbearing walls in the in-plane direction is considerably higher than its out-of-plane direction. Furthermore, there are several factors affecting the failure mechanisms, such as the geometry, quality of the masonry materials and boundary conditions. The damage on unreinforced masonry buildings can be observed as different forms, such as cracks in structural walls and spandrels, partial collapse, partial disintegration of the walls, cracks at the corners and intersections. The structural walls suffer vertical cracks at the corners and in the middle portion of the walls when subjected to seismic motion in the orthogonal direction of the walls. Once the seismic action is parallel to the in-plane of the walls, horizontal and diagonal cracks due to bending and shear occur, respectively.
Effect of retrofitting on the structural factors for seismic assessment of unreinforced masonry structures: a review
Published in Australian Journal of Structural Engineering, 2019
S. Dadras Eslamlou, M. J. Masia, Y. Z. Totoev, A. W. Page
Unreinforced masonry buildings are vulnerable to damage and/or collapse under seismic loading. These structures perform poorly during earthquakes for a range of different reasons such as high mass and stiffness, low tensile strength of the materials used in the structure, lack of adequate wall to wall and wall to floor/roof connections and in some cases, particularly for heritage masonry structures, poor construction quality due to the lack of skilled engineers and design standards. Therefore, retrofitting of URM buildings is an obvious solution for this issue as it can increase the load resistance of the walls of the structure, improve the performance of the structure during earthquakes, increase the ductility of the structure and prevent total collapse of the masonry building during intense shakes, or at least delay the collapse time if the partial collapse of the structure is unavoidable (Smith and Redman 2009; Meguro et al. 2005).