This paper presents fragility functions for clay brick unreinforced masonry (URM) buildings that were developed using the data of damage and earthquake intensity by the September 24, 2019, Mirpur, Azad Jammu and Kashmir earthquake. These data were collected through reconnaissance surveys in the affected region. The intensity of the earthquake ranged from V to VII on the Modified Mercalli Intensity scale in the surveyed areas. The damage to clay brick piers of bridges was caused by compression or shear-compression forces applied by the vertical seismic forces. Most of the damaged URM buildings showed in-plane wall cracking with very few cases of out-of-plane wall failure. The damage in these buildings was influenced by both the ground motion’s horizontal component and ground motion amplification due to site conditions. The damage types to the URM buildings in the surveyed areas were classified into five damage grades and these data were employed to propose fragility curves for clay brick URM buildings.
Bibliographical noteFunding Information:
The authors wish to acknowledge the logistical support provided by the staff members at Mirpur University of Science & Technology, Azad Jammu and Kashmir, during the surveys and data collection for the presented studies in this paper. Professor Humberto Varum acknowledges the financial support provided by Project POCI-01-0145-FEDER-007457—CONSTRUCT—Institute of R&D in Structures and Construction, funded by Fundo Europeu de Desen-volvimento Regional (FEDER) funds through COMPETE2020— Programa Operacional Competitividade e Internacionalização (POCI)—and by national funds through FCT (Fundação para a Ciência e a Tecnologia).
© 2023 American Society of Civil Engineers.
- Building and Construction
- Civil and Structural Engineering
- Reliability and Quality
- Brick masonry
- Damage grades
- Earthquake intensity
- Fragility curve
- Building typology
- Masonry pier