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A platform for research: civil engineering, architecture and urbanism
Effect of FRP Strengthening Intervention on the Seismic Fragility of Substandard RC Buildings
Rapid urbanisation and population growth have increased the exposure of existing buildings to seismic risk in earthquake prone regions. The need to address the growing demand for a low-cost building stock has also led a large proportion of residential buildings in developing countries to be constructed with substandard materials, insufficient designs and poor construction practices. As a result, such building stock is vulnerable against earthquakes. However, obtaining accurate vulnerability curves representing the actual behaviour of these structures can be a challenging task. This study aims to develop analytical vulnerability curves for typical substandard RC buildings in Turkey by considering common deficiencies of Turkish building stock. To this end, an existing 4-storey substandard RC building located in Turkey, is selected as a case study example. OpenSees software is employed to develop the realistic model of the structure by considering the effects of various parameters, such as steel grade, concrete strength, transverse rebar spacing, and axial load level on the vulnerability of the structure. In addition, to assess the efficiency of FRP strengthening intervention, upgraded fragility curves are obtained by applying external retrofitting on the structure using CFRP sheets. The results show that the vulnerability curves are highly sensitive to the reinforcing steel grade and concrete strength. It is also observed that the seismic vulnerability was reduced up to 85% and 45% for slight and collapse damage limit states, respectively, by using 3 layers of CFRP. The results of this study should prove useful for the vulnerability assessment and strengthening of substandard RC buildings.
Effect of FRP Strengthening Intervention on the Seismic Fragility of Substandard RC Buildings
Rapid urbanisation and population growth have increased the exposure of existing buildings to seismic risk in earthquake prone regions. The need to address the growing demand for a low-cost building stock has also led a large proportion of residential buildings in developing countries to be constructed with substandard materials, insufficient designs and poor construction practices. As a result, such building stock is vulnerable against earthquakes. However, obtaining accurate vulnerability curves representing the actual behaviour of these structures can be a challenging task. This study aims to develop analytical vulnerability curves for typical substandard RC buildings in Turkey by considering common deficiencies of Turkish building stock. To this end, an existing 4-storey substandard RC building located in Turkey, is selected as a case study example. OpenSees software is employed to develop the realistic model of the structure by considering the effects of various parameters, such as steel grade, concrete strength, transverse rebar spacing, and axial load level on the vulnerability of the structure. In addition, to assess the efficiency of FRP strengthening intervention, upgraded fragility curves are obtained by applying external retrofitting on the structure using CFRP sheets. The results show that the vulnerability curves are highly sensitive to the reinforcing steel grade and concrete strength. It is also observed that the seismic vulnerability was reduced up to 85% and 45% for slight and collapse damage limit states, respectively, by using 3 layers of CFRP. The results of this study should prove useful for the vulnerability assessment and strengthening of substandard RC buildings.
Effect of FRP Strengthening Intervention on the Seismic Fragility of Substandard RC Buildings
Lecture Notes in Civil Engineering
Ilki, Alper (editor) / Çavunt, Derya (editor) / Çavunt, Yavuz Selim (editor) / Khoshkholghi, Soheil (author) / Ozdemir, Zuhal (author) / Hajirasouliha, Iman (author) / Pilakoutas, Kypros (author)
International Symposium of the International Federation for Structural Concrete ; 2023 ; Istanbul, Türkiye
2023-06-03
10 pages
Article/Chapter (Book)
Electronic Resource
English
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