First-order approximation towards empirical seismic vulnerability assessment of low-cost unreinforced masonry buildings in South Africa
AbstractThe 5 August 2014 Orkney earthquake in South Africa caused significant damage to low-cost unreinforced masonry buildings. After the earthquake, post-earthquake surveys were conducted to assess damage and deduce the intensity experienced by these buildings. During these surveys, only building...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2024-12-01
|
| Series: | Geomatics, Natural Hazards & Risk |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/19475705.2023.2300837 |
| _version_ | 1797361291922243584 |
|---|---|
| author | Thando Nqasha Zeenat Khoyratty Mulemwa Akombelwa Mayshree Singh Andrzej Kijko |
| author_facet | Thando Nqasha Zeenat Khoyratty Mulemwa Akombelwa Mayshree Singh Andrzej Kijko |
| author_sort | Thando Nqasha |
| collection | DOAJ |
| description | AbstractThe 5 August 2014 Orkney earthquake in South Africa caused significant damage to low-cost unreinforced masonry buildings. After the earthquake, post-earthquake surveys were conducted to assess damage and deduce the intensity experienced by these buildings. During these surveys, only buildings that were reported as damaged were investigated. This study conducted an empirical seismic vulnerability assessment using data collected from those surveys. However, for a comprehensive assessment, the data should include all buildings in the study area. Hence in this study, a first-order approximation was applied to gather sufficient data to construct fragility curves for low-cost unreinforced masonry buildings in South Africa. The damage probability matrix technique was used for fragility curve construction. The fragility curves were constructed using the intensity and damage data, statistical models, and model fitting techniques. The fragility curves obtained in this study predicted comparable but slightly lower damage compared to other curves for unreinforced masonry buildings of similar typology. Although the method applied was able to produce fragility curves comparable with other studies, it is recommended that in order to get a reliable fragility curves all the buildings in the study area should be investigated including those that suffered little to no damage. |
| first_indexed | 2024-03-08T15:51:45Z |
| format | Article |
| id | doaj.art-79cd48efc7114de79a66f48019bf8d99 |
| institution | Directory Open Access Journal |
| issn | 1947-5705 1947-5713 |
| language | English |
| last_indexed | 2024-03-08T15:51:45Z |
| publishDate | 2024-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Geomatics, Natural Hazards & Risk |
| spelling | doaj.art-79cd48efc7114de79a66f48019bf8d992024-01-09T04:41:18ZengTaylor & Francis GroupGeomatics, Natural Hazards & Risk1947-57051947-57132024-12-0115110.1080/19475705.2023.2300837First-order approximation towards empirical seismic vulnerability assessment of low-cost unreinforced masonry buildings in South AfricaThando Nqasha0Zeenat Khoyratty1Mulemwa Akombelwa2Mayshree Singh3Andrzej Kijko4School of Civil Engineering, Surveying and Construction, University of KwaZulu Natal, Durban, South AfricaSchool of Civil Engineering, Surveying and Construction, University of KwaZulu Natal, Durban, South AfricaSchool of Civil Engineering, Surveying and Construction, University of KwaZulu Natal, Durban, South AfricaSchool of Civil & Environmental Engineering, University of the Witwatersrand, Johannesburg, South AfricaNatural Hazard Centre, Pretoria University, Pretoria, South AfricaAbstractThe 5 August 2014 Orkney earthquake in South Africa caused significant damage to low-cost unreinforced masonry buildings. After the earthquake, post-earthquake surveys were conducted to assess damage and deduce the intensity experienced by these buildings. During these surveys, only buildings that were reported as damaged were investigated. This study conducted an empirical seismic vulnerability assessment using data collected from those surveys. However, for a comprehensive assessment, the data should include all buildings in the study area. Hence in this study, a first-order approximation was applied to gather sufficient data to construct fragility curves for low-cost unreinforced masonry buildings in South Africa. The damage probability matrix technique was used for fragility curve construction. The fragility curves were constructed using the intensity and damage data, statistical models, and model fitting techniques. The fragility curves obtained in this study predicted comparable but slightly lower damage compared to other curves for unreinforced masonry buildings of similar typology. Although the method applied was able to produce fragility curves comparable with other studies, it is recommended that in order to get a reliable fragility curves all the buildings in the study area should be investigated including those that suffered little to no damage.https://www.tandfonline.com/doi/10.1080/19475705.2023.23008372014-Orkney earthquakeunreinforced masonry buildingsearthquake damagefragility curves |
| spellingShingle | Thando Nqasha Zeenat Khoyratty Mulemwa Akombelwa Mayshree Singh Andrzej Kijko First-order approximation towards empirical seismic vulnerability assessment of low-cost unreinforced masonry buildings in South Africa Geomatics, Natural Hazards & Risk 2014-Orkney earthquake unreinforced masonry buildings earthquake damage fragility curves |
| title | First-order approximation towards empirical seismic vulnerability assessment of low-cost unreinforced masonry buildings in South Africa |
| title_full | First-order approximation towards empirical seismic vulnerability assessment of low-cost unreinforced masonry buildings in South Africa |
| title_fullStr | First-order approximation towards empirical seismic vulnerability assessment of low-cost unreinforced masonry buildings in South Africa |
| title_full_unstemmed | First-order approximation towards empirical seismic vulnerability assessment of low-cost unreinforced masonry buildings in South Africa |
| title_short | First-order approximation towards empirical seismic vulnerability assessment of low-cost unreinforced masonry buildings in South Africa |
| title_sort | first order approximation towards empirical seismic vulnerability assessment of low cost unreinforced masonry buildings in south africa |
| topic | 2014-Orkney earthquake unreinforced masonry buildings earthquake damage fragility curves |
| url | https://www.tandfonline.com/doi/10.1080/19475705.2023.2300837 |
| work_keys_str_mv | AT thandonqasha firstorderapproximationtowardsempiricalseismicvulnerabilityassessmentoflowcostunreinforcedmasonrybuildingsinsouthafrica AT zeenatkhoyratty firstorderapproximationtowardsempiricalseismicvulnerabilityassessmentoflowcostunreinforcedmasonrybuildingsinsouthafrica AT mulemwaakombelwa firstorderapproximationtowardsempiricalseismicvulnerabilityassessmentoflowcostunreinforcedmasonrybuildingsinsouthafrica AT mayshreesingh firstorderapproximationtowardsempiricalseismicvulnerabilityassessmentoflowcostunreinforcedmasonrybuildingsinsouthafrica AT andrzejkijko firstorderapproximationtowardsempiricalseismicvulnerabilityassessmentoflowcostunreinforcedmasonrybuildingsinsouthafrica |