Detecting and Geolocating City-Scale Soft-Story Buildings by Deep Machine Learning for Urban Seismic Resilience
Publication: Natural Hazards Review
Volume 23, Issue 1
Abstract
Seismic resilience is of great concern and vital importance for cities in earthquake zones. It is not only desirable but also mandatory for the cities to prepare an emergency response plan for possible seismic events. One important task is to identify the seismic vulnerable buildings, e.g., soft-story (SS) buildings. The identified SS buildings can be retrofitted to minimize the risk of possible damage and the mitigation plan can be made accordingly to allocate the needed resources to the vulnerable buildings when earthquake strikes. However, it is time-consuming and costly for structural engineers to identify SS buildings manually by walking through each street. This paper presents an integrated approach for automatically detecting and geolocating SS buildings at a city scale. The approach proceeds in multiple steps, including (1) obtaining a list of addresses of engineer-identified SS buildings in city of Santa Monica, CA; (2) extracting the Google Street View images of the SS buildings; (3) labeling the SS building in the images; (4) training a deep convolutional neural network with the annotated images; and (5) testing the trained model on an independent image data set. The detected SS buildings are geocoded in Google map for users to verify the results quickly and virtually.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are proprietary or confidential in nature and may only be provided with restrictions. Soft-story building information for city of Sana Monica is available at https://gis-smgov.opendata.arcgis.com/datasets/locations.
Acknowledgments
Authors thank Mr. Evan Reis from the US Resiliency Council, who provided more than 2,000 images of soft-story buildings and his valuable insights for the research. The authors also thank Bentley colleagues Raoul Karp, Kaustubh Page, and Jason Chickneas for their help and suggestions on the initiative of the research project.
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© 2021 American Society of Civil Engineers.
History
Received: Nov 20, 2020
Accepted: Oct 27, 2021
Published online: Dec 11, 2021
Published in print: Feb 1, 2022
Discussion open until: May 11, 2022
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