Examination with geographical information system of risky structures according to law no. 6306: Example of Uşak province

Turkey is a high-risk eartquake country due to its geographical location. The loss of life and property in Marmara Earthquake in 1999 and Van Earthquake in 2011 obliged the urban transformation. Legal regulations have been issued for the buildings at disaster risk to turn into earthquake resistant building. With these regulations, the law about Transformation of Areas at Disaster Risk numbered 6306 was entered into force on 31.05.2012. In this thesis, the buildings at risk in Uşak were analyzed within the law of Transformation of Areas at Disaster Risk numbered 6306 by means of Geographic Information Systems (GIS). By the entry into force of Turkey Eartquake Risk Map, Earthquake hazard of each neighborhood and settlement have been changed depending of their proximity and distance to fault line. The buildings at risk in Uşak province pose danger in view of Turkey Eartquake Risk Map. With the context of the thesis Uşak Provincial Directorate of Environment and Urbanization analyzed the records of buildings at risk analyzed from 2013 to 2019. There were 583 destroyed buildings from 19 present central neighborhoods. The range of the buildings at risk in regard to neighbourhood and the relation of this range between building type, building age, number of floors and fault line is evaluated and it is aimed to contribute for next studies. The data from Uşak Provincial Directorate of Environment and Urbanization were processed according to their features, while determining the range according to neighbourhoods. The location of destroyed buildings is determined from their map section, city block and parcel information. The buildings at risk determined their locaiton were analyzed by marking on the map. In this thesis the examples of urban transformation in Turkey and all around the world and the physical, social , economic aspects of urban transformation and execution methods are shortly summarized. The steps from the determination process of the buildings at risk to the agreement and reconstruction are described in application example of Uşak province. Although within the scope of the thesis Uşak province is explained, the existance of non-earthquake resistant buildings is a sad truth of the country. Urban transformation based on the social and economic aspects is most beneficial solution. The application of determination and transformation of the buildings at risk that has been agenda recently is a current approach. It keeps its scientific originality. According to the results of the analysis Ünalan neighboorhood has the most buildings at risk while Elmalidere has the least ones. 473 of 583 buildings at risk are masonry and 110 of those have ferroconcrete bearing system. With a large proportion of 81% buildings with masonry support system were more demolished.According to the data in this study, it seems that the average life of a building is approximately 50 years and the risk factor and the age of the building increase in direct propotion.238 buildings of 583 destroyed ones has 2 floors. 22 of 2-storey buildings have ferroconcrete system type, 216 of then have masonry and wood-mudbrick bearing system type.The most buildings were demolished in 2015 from 2013 to 2018.