TECHNICAL PAPER Analysis of RC structures with different design mistakes under explosive based demolition Hakan Özmen 1 | Kurtulus ¸ Soyluk 2 | Özgür Anil 2 1 Ph. D. Student, Department of Civil Engineering, The Ministry of Environment and Urbanization, Ankara, Turkey 2 Prof. Dr., Department of Civil Engineering, Gazi University, Ankara, Turkey Correspondence Özgür Anil, Department of Civil Engineering, Gazi University, Ankara, Turkey. Email: oanil@gazi.edu.tr Abstract Most of the RC buildings in Turkey have reached the end of their economic lifespan, so urban transformation studies have been accelerated in recent years. Considering the fact that these buildings do not meet the construction regula- tions and have structural defects in terms of earthquake resistance is concluded the necessity of renewal of this building stock. For this reason, it is needed to study the explosive based demolition technique, which have been widely used in the future in Turkey. The aim of this study is to analyze the structural behavior of buildings planed for demolition by using explosive materials and demonstrating the effect of structural faults on the demolition process. In this context, the effect of structural defects on structural behavior is investigated under explosive based demolition for a typical RC framed building model. Within the scope of the study, it is aimed to investigate the effects of design errors frequently encountered in reinforced concrete structures during the demolition of the building using explosives. The main objective of the study is to determine the effects of design errors, which may be present in the building on important results such as demolition of reinforced concrete structures that are planned to be demolished in two different types using an explosive inside or towards a selected direction, distribution of the parts scattered after demoli- tion and the demolition time. In this way, it is aimed to prevent accidents or unwanted demolition patterns that may occur in demolition works of reinforced concrete structures with design errors. A 12-storey square building in plan with 6x6 axles (5 m axle opening) is selected as a structural system. The selected structure has been designed with Ide Static Structural Analysis Pro- gram. The same structure is also modeled with extreme loading for structures (ELS) program for low concrete strengths, reinforcement defects, and locally located structural defects considering inside and side demolition used explo- sives. All building models have been subjected to the same blast planning. It is observed that reduced the concrete strength and reinforcement faults shorten the time of destruction of buildings scheduled for demolition by using Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors’ closure, if any, approximately nine months after the print publication. Received: 18 September 2019 Revised: 17 November 2020 Accepted: 27 November 2020 DOI: 10.1002/suco.201900367 Structural Concrete. 2020;1–25. wileyonlinelibrary.com/journal/suco © 2020 fib. International Federation for Structural Concrete 1