Field Applications For Risk Assessment Methods of Urban Transformation Law No. 6306: A Case Study Of Beyoğlu

Abstract

One of the most important risks in Turkey is the high seismic activity in the region. Therefore, identification of high risk structure inventory under earthquake conditions as a priority and reinforcement or demolishing/renovation within the scope of disaster risk planning is a priority subject. In this respect, Law no. 6306 of Transformation of Areas under the Disaster Risks and issued in 2013 includes highly important information and methodology regarding identification of risk level for either individual structures of or an area including numerous structures. The first of the methodology included in the appendices of the application instructions of this law describes regulations on identification of risk level of an individual structure and the second methodology regarding prioritization of risk level via expedited assessment of numerous structures within an area/region. Increase in probability of occurrence of an earthquake in cities such as Istanbul where numerous structures exist increases the necessity of conducting rapid assessment of earthquake risk of numerous structures and conducting necessary studies required for planning of renewal at regions where level of risk is higher. One of the most important risks in Turkey is the high seismic activity in the region. Therefore, identification of high risk structure inventory under earthquake conditions as a priority and reinforcement or demolishing/renovation within the scope of disaster risk planning is a priority subject. In this respect, the Regulation on the Implementation of Law no. 6306 includes highly important information and methodology regarding identification of risk level for either individual structures of or an area including numerous structures. The first of the methodology included in the appendices of the application instructions of this law describes regulations on identification of risk level of an individual structure and the second methodology regarding prioritization of risk level via expedited assessment of numerous structures within an area/region. Increase in probability of occurrence of an earthquake in cities such as Istanbul where numerous structures exist increases the necessity of conducting rapid assessment of earthquake risk of numerous structures and conducting necessary studies required for planning of renewal at regions where level of risk is higher. For this purpose, it is necessary to correlate the assessment methodologies of individual structures and of many structures in a rapid manner as explained in the Regulation on the Implementation of Law no. 6306 for studies of assessment of risk level for these areas and of prioritization. Therefore, in this study a new method is formed and proposed herein which combines the application of these two methodologies. This new methodology is applied at total of 5561 structures located in 6 different neighbourhoods of Okmeydanı region of Beyoğlu district (i.e., Fetihtepe, Kaptanpaşa, Keçeci Piri, Kulaksız, Piri Paşa and Piyale neighbourhoods) and one of the most comprehensive studies on application of the Law has been conducted. The method is developed as a general methodology that can be applied to identify risk status of any region based on superstructure distribution. The methodology supports the rapid assessment and detailed assessment methodologies given respectively in “Annex-A” and Annex-2 of the Regulation on the Implementation of the applicable law, and set forth based on scientific literature.