EGE 8th INTERNATIONAL CONFERENCE ON APPLIED SCIENCES, İzmir, Turkey, 2 - 04 June 2023, pp.1-12
The Eastern Anatolian Fault Zone (EAFZ), which is one of Turkiye's two main active fault
systems, experienced two of the largest and most destructive earthquakes last century on Feb.
6th, 2023. The epicentres were close to Kahramanmaras, in the districts of Pazarcik and Elbistan,
at local times of 04:17 and 13:24, and the corresponding magnitudes were Mw7.7 and Mw7.6,
respectively. The earthquakes' depths were 8.6km and 7.0km, respectively. Many buildings
were damaged but did not collapse in the Pazarcik earthquake. However, nine hours later some
of heavy damaged buildings collapsed in the Elbistan earthquake. This study (i) briefly presents
seismotectonic features of the earthquake region, and (ii) presents damages on reinforced
concrete buildings with on-site investigations due to the following subsequent earthquakes in
the EAFZ. The use of plain round rebar, a lack of stirrup tightening in the column-beam joint,
poor construction quality, the presence of a soft/weak ground story, low concrete strength,
pounding effects, underestimating the requirements for earthquakes, and the building's
foundation flipping over were the general causes of collapses.