Page 252 - Çevre Şehir İklim İngilizce - Sayı 4

General Properties and Seismic Performance of High Risk Buildings in
Our Country

expected largest earthquake with severe damage without collapsing.
Engineering quality and vision, such as the correct selection of the
system, the accurate design of the building and strict compliance
with shop drawings are among the factors that determine whether a
building can survive after a severe earthquake.
• Especially in Hatay and Adiyaman-Gölbaşı provinces, the growth of
ground-induced earthquake movement with soft soil effects and sudden
loss of strength in the ground have been observed (ODTÜ 2023, ITU
2023, BOU 2023). Such effects, of course, have the potential to overturn
the buildings designed according to the earthquake regulations in
case of having shallow foundation. It is noticeable that the damage
is relatively less, especially in buildings with basements. In addition,
suggesting the ground effects as the main factor may not be considered
as a sound argument since the soil, drilling, laboratory experiments and
geotechnical reports that were mandatory before the construction of
these buildings must have determined this possible hazard. However,
failure to fully determine the ground effects and characteristics at the
design stage may lead to soil amplification and soil-related damage in
areas with a special ground condition as is here.
• Buildings constructed before 2000 (buildings designed before 1998)
are expected to be designed according to the 1975 regulations. The
earthquake design forces specified in this regulation are significantly
lower than those given in the earthquake regulations of 1998 (ABYBHY
1998), 2007 (ABYBHY 2007) and 2019 (TBDY 2018). In addition, this
regulation does not contain the terms such as strong column weak
beam, shear checks on joints etc. that were included in the world
earthquake engineering after 1980-1990s. For this reason, there will
be flaws in the buildings designed at the limits according to the 1975
regulations, compared to the current regulations. However, people and
entities engaged in predictive engineering and contracting may have
designed high-strength, earthquake-resilient buildings between 1970-
1998, and such buildings may display sufficient performance. Of course,
the buildings constructed before 2000 which were not subjected to
proper engineering services are directly inadequate. In the light of this
information, it is expected that the buildings before 2000 will perform
poorly due to design flaws and inadequacies.
• One of the major problems encountered in the design of buildings
started to be constructed after the 2000s is actually the unconscious
use of software that automatically gives all the dimensions and
reinforcement details after drawing the building plan, which is called a

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