Page 210 - Çevre Şehir İklim İngilizce - Sayı 4

An Evaluation on Damage Assessment Works in
Kahramanmaraş Earthquake

Interior. In classification of these buildings according to their construction
techniques, wooden, mixed or unidentified bearing systems are indicated as
others (“2023 Kahramanmaraş and Hatay Earthquakes Report”, 2023).

Table-5 Percentages of Load-Bearing Systems of Buildings in the Earthquake Zone (%)
Reinforced
Concrete Steel Masonry Prefabricated Other
Building 86.7 2.4 3.5 3.6 3.9
Apartment 95.4 0.4 1.3 0.6 2.3
While the methods of damage assessments were defined for reinforced
concrete and masonry buildings, experts were assigned for the buildings
that differ or have specific features in terms of construction technology (for
example, steel, prefabricated, seismic insulators, etc.).
In addition, the Turkish Building Earthquake Regulation, which entered into
force in 2019, provides the necessary rules and minimum conditions for the
design and construction of all public and private buildings and building-type
structures, all or parts of which will be reconstructed, modified, extended, as
well as for the evaluation and strengthening of the performance of existing
buildings under the impact of earthquakes. According to this regulation,
the design earthquake, which will be based on the design of new buildings,
corresponds to the severe earthquake defined in 1.2.1. For buildings with a
Building Significance Coefficient I = 1, defined in Section 2, Table 2.3, the
probability of exceeding the design earthquake within a 50-year period is
10%. Earthquakes with different exceeding probabilities are defined in Section
7 in order to be taken into account in the assessment and reinforcement of
existing buildings (Turkish Building Earthquake Regulation, 2018).
Looking through the earthquakes centered in Kahramanmaraş, it was seen
that the largest ground acceleration was 0.664 (g)=0.664×9.81=6.51 m/s2 and
the highest acceleration that can occur in a building was 2 (g)=2×9.81=19.62
m/s2. At the same coordinate points on the earthquake hazard maps of
Türkiye, the maximum ground acceleration is estimated as 0.375 (g) and the
maximum building acceleration is projected as 1.075 (g) in the values based
on the design. The realized value of 0.664 (g) is significantly greater than
the design acceleration value of 0.375 (g). As a result of multiplying these
accelerations by the weight of the building, the earthquake force expected
to affect/affected the structure is determined. Due to these accelerations,
damage has also occurred to the structures that are under construction in
the region. For assessing such buildings, a Circular on Incomplete Buildings
in Zones of Disaster Affecting the Public Life was published by AFAD on
19.02.2023. According to the circular, in order to assess the condition of

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