Vulnerability Assessment of Buildings Based on Rapid Visual Screening and Pushover: Case Study of Gyor, Hungary

Abstract

The process of carrying out an earthquake risk assessment of a town can provide important data for authorities and disaster management to better understand risks to many buildings rather than a single building. This is even more important in the case of moderate seismic areas where any mitigation measures to be taken should be justified by seismic risk determination. Moderate seismicity does not necessarily equate to moderate damage from earthquakes. Vulnerability to earthquakes even increases with extending urban areas. Seismicity in the Pannonian Basin is moderate compared to seismicity of surrounding areas, nonetheless, reports of major earthquakes in Hungary often refer to heavy building damage and liquefaction (e.g. 1763 Komarom earthquake). Gyor was chosen to be the examined area for seismic risk analysis because it is the most important city of northwest Hungary with a large number of monumental buildings and a complex geological and geographical settings. In order to make the best use of limited resources usually characteristic to moderate seismic zones, the presented method used existing soil data, rapid visual screening of buildings, a limited number of field tests and free, but sophisticated, software. This paper focuses on the results of vulnerability analysis of buildings; however, it considers the results of seismic hazard and local site effects based on response analysis with more than 6000 realizations. Vulnerability of the buildings with different structural types were evaluated based on a rapid visual screening of 5000 building. Vulnerability based on visual screening was compared to a pushover analysis of the typical constructions. As one would expect, since the hazards and vulnerabilities were not uniformly distributed in the city districts of Gyor, there were zones of higher and lower risk. These results can then serve as useful tools for decision makers and can be applied directly to risk management plans.

Seismic Vulnerability Assessment in Ranau, Sabah, Using Two Different Models

“…The existence of buildings is signaling the existence of population in the area and are directly related to potential human and economic damage in case of an earthquake episode. A high number of seismic activities that occurred near the settlement area indicate how highly the community in the study area is exposed to seismic vulnerability [77,78].…”

Damage Identification of Small Houses in Different Seismic Regions

“…The degrees of damage are described quite clearly in (Lang, 2002;Lang, 2004;Okada, 2000). Many studies have been carried out (Corsanego, 1994;Okada, 2000;Giovinazzi, 2004;Kegyes-Brassai, 2007), etc. focusing on the vulnerability of existing buildings.…”

Application of Support Vector Machine Modeling for the Rapid Seismic Hazard Safety Evaluation of Existing Buildings

“…Extensive research in incorporating several methodologies into RVS, for instance, statistical methods [10,11], Artificial Neural Network (ANN) [12][13][14], Multi-criteria decision making [15], and type-1 [16][17][18][19] and type-2 [20] fuzzy logic systems are performed constantly to update and increase the efficacy of vulnerability screening. There are other methods for the damage identification techniques of buildings with the use of superior quality optical satellite images [21,22], and seismic vulnerability evaluation of the school buildings constructed by industrialized building schemes [23] or seismic vulnerability assessment of school buildings through RVS and compared with the results of their pushover analysis [24], which demonstrates the variation of efforts in seismic vulnerability assessment of structures. The significance of parameters and the optimum number for parameter selection has been used effectively by Morfidis and Kostinakis [25].…”