Non-linear static analysis of masonry buildings based on a strut-and-tie modeling |
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| Institution: | 1. Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Calz. Las Americas Nte. S/N, CU, Culiacán de Rosales, Sinaloa 80013, Mexico;2. Instituto de Ingeniería, Universidad Nacional Autónoma de México, Av. Universidad 3000, CU, CP 04510 Ciudad de México, Mexico;3. Escuela de Ingeniería, Universidad Autónoma de Sinaloa, Ciudad Universitaria, Av. Ejército Mexicano y Av. de los Deportes, C.P. 82017, Mexico;1. Departamento del Hábitat y Desarrollo Urbano, Instituto Tecnológico y de Estudios Superiores de Occidente (ITESO), Periférico Sur Manuel Gómez Morín 8585, 45604 Tlaquepaque, Jalisco, Mexico;2. Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Kurfürstendamm 200, 10719 Berlin, Germany;3. Departamento de Ciencias Computacionales, Centro Universitario de Ciencias Exactas e Ingeniería, Universidad de Guadalajara (UdeG), Boulevard Marcelino García Barragán 1421, 44430 Guadalajara, Jalisco, Mexico;1. Department of Obstetrics and Gynecology, Far Eastern Memorial Hospital, Banqiao, New Taipei, Taiwan;2. Department of Obstetrics and Gynecology, National Taiwan University College of Medicine and National Taiwan University Hospital, Taipei, Taiwan;1. Department of Civil and Environmental Engineering, Imperial College London, UK;2. Department of Civil Engineering and Architecture, University of Catania, Italy |
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| Abstract: | This paper presents an analytical method for evaluating the capacity curve of masonry buildings according to non-linear static analysis. This method splits the building into stories, and the vertical structures of each story into masonry panels, which are analyzed individually by a new push-over analysis. The behavior of each panel is reproduced with an evolutive strut-and-tie model, which simulates the uncracked and cracked behavior of the panel subjected to a vertical constant force and a lateral force that increases up to the complete development of the failure mechanism. The strut-and-tie model provides the capacity curve of the panel. The composition of the capacity curves of all the panels of a story provides the capacity curve of this story. The capacity curves of all the stories of the building can be used to obtain either the maximum drift that the building can withstand or the behavior factor of the structure. Either outcome allows the specific dissipation capacity and overstrength of the masonry building to be considered in the seismic analyses, which provides ultimate limit state verifications with more reliability.The proposed method is applied to a school building. The comparison between seismic safety assessed with this method and with a linear dynamic analysis, all other parameters being equal, shows that the latter approach is overly-conservative and misleading. In fact, the specific inelastic capacity, which only the former approach can consider, influences greatly the seismic behavior of the case study. |
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| Keywords: | Masonry buildings Seismic safety Non-linear static analysis Strut-and-tie modeling Dissipation Overstrength Masonry structures |
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