Construction Damage Analysis After Izmir Earthquake


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Kağıt S., İpek C.

INTERNATIONAL SYMPOSIUM ON ENGINEERING NATURAL SCIENCES AND ARCHITECTURE, Kocaeli, Turkey, 20 - 21 May 2021, pp.27-31

  • Publication Type: Conference Paper / Full Text
  • City: Kocaeli
  • Country: Turkey
  • Page Numbers: pp.27-31

Abstract

Most of the lands (95%) in our country have earthquake risk due to active faults. The Izmir earthquake occurred on October 30, 2020 at 14.51, off the epicenter of Seferihisar, Izmir offshore (17.26 km) in the Aegean Sea at a depth of 16.54 km in the size of Mw 6.6 (AFAD), 6.9 (kandilli Observatory). The Izmir earthquake significantly increased the stress on existing faults, especially around Kusadasi. The earthquake was felt in neighboring countries and caused serious damage to historical buildings on the Greek island of Somos. In the Izmir earthquake, damage was determined in 22 thousand buildings and 141 thousand independent areas, and it was determined that the number of seriously damaged emergency and collapsed buildings was 180. As the demolition and reconstruction of buildings damaged by the earthquake involves high economic costs, the tendency towards building strengthening methods has increased.In this study, the geometry of a heavily damaged building in Izmir flagged district for earthquake damage reasons of the heavily damaged buildings and the bearing element damage level were graded and examined to determine the damage level. The building was built before the 1999 Kocaeli earthquake. The construction technology of the 1970s was used, and it was observed that the stirrup spacing in concrete and reinforcements (flat iron) was rather weak in beams and columns. Building information from the damage assessment report: bearing system, curtain and frame system and carrier system behavior coefficient 7, 8 floors (Z + 7), floor area 140 m2 in total 1278.2 m2, local ground class ZE building dominant period (s) 1356.46 and maximum ground safety tensile 27.38 t / m2. In particular, according to the 2018 Turkey earthquake existing Directing cause collapse of the carrier element structural analysis carried out in detail the structure has been put heavy. These are: Inadequate material and section properties, incorrect design according to regulations, short column work, soft storey, irregular bearing systems, insufficient horizontal rigidity and insufficient strength have been found to constitute a significant part of the damage reasons. Keywords-2018 Turkish Earthquake Code, damage analysis, building safety, reinforced construction structure, earthquake