Probabilistic risk assessment of an existing RC building strengthened with steel bracings
Document Type
Conference Proceeding
Publication Date
2022
Department/School
Engineering Technology
Publication Title
Proceedings of the 10th International Conference on Behaviour of Steel Structures in Seismic Areas: STESSA 2022
Abstract
Turkey is one of the earthquake-prone countries that experienced strong earthquakes in 1999. The last devastating earthquake hit Northwest part of the country, called as Marmara Earthquake, close to Istanbul. After these experienced earthquakes, various strengthening techniques have been applied to increase the seismic response of existing buildings against earthquake loads in seismically prone regions. These techniques aim to improve the lateral resistance of existing buildings by adding new elements such as steel bracing or shear walls. Braced members are one of the widely used approaches and practices for fast responses. They are used to increase the structural capacity under earthquake loads. The present study investigates a real, existing 7-story reinforced concrete (R/C) building located in Istanbul, Turkey as a case study. With seismic assessments, strengthening for existing buildings with steel bracings was evaluated. The selected building was designed according to the 1975 Turkish Seismic Code and strengthened according to the current 2007 Turkish Design Code. The construction of strengthening is currently completed, and the building is occupied in one of the high demanding regions in Istanbul, Turkey. Steel bracings were preferred to strengthen the project to gain the usage area. Strengthening with steel bracing also decreased disturbance faster than other supporting methods. The research determined the nonlinear structural behavior of a representative existing and strengthened reinforced concrete (R/C) building. Pushover curves were plotted for the existing and strengthened building models. Lateral displacements, story displacements, and plastic hinge rotations were calculated for the building. Then, probabilistic risk assessment was carried out by plotting the probability of exceedance curve for the building.
Recommended Citation
Korkmaz, K. A. (2022). Probabilistic risk assessment of an existing RC building strengthened with steel bracings. In F. M. Mazzolani, D. Dubina, & A. Stratan (Eds.), Proceedings of the 10th international conference on behaviour of steel structures in seismic areas (pp. 465–472). Springer International. https://doi.org/10.1007/978-3-031-03811-2_48
Comments
K. A. Korkmaz is a faculty member in EMU's School of Engineering.