Abstract
Yüz ölçümünün büyük bölümü I. derece deprem kuşağı üzerinde bulunan ülkemizde bu duruma
karşı yapılacak en önemli hazırlık, hayatlarımızı sürdürdüğümüz yapıların depreme dayanıklı
olmasını sağlamaktır.
Yapıların depreme dayanıklı olmasında mevcut yönetmeliklere uygun projelendirilmesi ve projesine
uygun inşa edilmesi en önemli etkenlerdir. Bununla birlikte yönetmeliklerin yeni gelişmeler
gözönüne alınarak değişmesi sebebiyle önceki yönetmelikler esas alınarak inşa edilen binaların
incelenmesi gerekebilmektedir. Bu kapsamda mevcut binaların taşıma kapasitelerinin arttırılması
için bazı çalışmalar yapılmaktadır. Bu çalışmaların tamamı güçlendirme olarak
adlandırılmaktadır.
Güçlendirme yerleşim alanlarının tümünde uygulanması gerekebilecek bir ihtiyaçtır. Her yerleşim
alanında kullanılan malzemeye bağlı olarak güçlendirme uygulamaları da çeşitlilik göstermektedir.
Türkiye'deki mevcut yapıların büyük çoğunluğu betonarme bina olup yeni yapılan binaların
çoğunluğu da betonarme olarak inşaa edilmektedir.
Bu çalışmada, deprem güvenliği yetersiz betonarme bir bina için Sta4CAD programı yardımıyla
farklı güçlendirme önerileri sunulmuş ve her öneri için maliyet analizi OSKA yaklaşık maliyet
hesaplama programı ile yapılmıştır. Bu önerilerden elde edilen sonuçlar birbirleriyle ve mevcut
binadan elde edilen sonuçlarla kıyaslanmıştır. Bu kıyaslmaların sonucunda; bina dış akslarına ve
iç akslarına perdelerin yerleştirildiği güçlendirme önerisinin rijitlik ve maliyet açısından daha
uygun sonuçlar verdiği tespit edilmiştir.
Keywords
Comparison of Different Retrofitting Proposals for a Reinforced Concrete Building with Inefficient Earthquake Safety
Abstract
The big portion of our country is in the earthquake
zone and the most important preparation against to
this situation is to construct the earthquake-resistant
buildings.
The most important parameter for earthquakeresistant
buildings is to construct them in
accordance with existing specifications. However;
we know that the specifications are continually
updated depending on the novel developments.
Therefore, the buildings constructed by using
previous specifications should be also investigated
again. In that context, some applications have been
used to increase the strength of existing buildings
are called as retrofitting.
Retrofitting is a necessity and its applications may
be various by using different materials. Most of the
existing buildings in Turkey have been constructed
as reinforced concrete and this tradition is valid for
the currently constructed buildings.
Among the important factors in the emergence of
retrofitting necessity of existing buildings are the
time-dependent corrosion of the buildings, concrete
produced in unsuitable conditions, performing the
checks insufficiently during the construction,
consolidation on the building foundation,
modification in occupancy of structural system,
adding new structural members subsequently,
removing some members from building and
changing of design specifications.
Pulling down the existing buildings and rebuilding
of them may be inappropriate for economic reasons.
Therefore, retrofitting could be preferred providing
that reasonable cost. According to ‘Specification for
Building to be Built in Seismic Zone (2007)’, the
probability of occuring a high-intensity earthquake
for the existing buildings during their service life is
so high. For this reason, retrofitting necessity could
be inevitable for the structural safety.
There are lots of articles and theses in the subject of
retrofitting of reinforced concrete structures. Some
studies could be summarized as follows:
Ghobarah et al. (2000) investigated the earthquake
performance of an existing office building. They
obtained the performance curve by using non-linear
pushover analysis.
Çetinkaya N. (2002) examined the retrofitting and
strengthening of reinforced concrete structures
using FRP (fiber retrofitting polymer) composite
materials. It is demonstrated that the retrofitting and
strengthening by using FRP increased the load
carrying capacity of members of structures.
Rocha et al. (2004) presented different numerical
simulations for retrofitting of reinforced concrete
frame structures and the results obtained from the
numerical simulations are compared to the results
obtained from the experimental studies.
Hueste and Bai (2007) investigated the earthquake
performance of five-story reinforced concrete office
structure constructed in 1980s. Three different
retrofitting proposals such as adding of shear walls,
jacketing of columns, binding of plastic zone of
columns by using steel plates are used to increase
the earthquake performance and the results of these
applications are compared to each other. The
comparisons showed that the most appropriate
proposal is the adding of shear walls.
Gürol K.B. (2007) evaluated different retrofitting
strategies for reinforced concrete structures with
inefficient earthquake structures. The influence of
each retrofitting strategies to structure behaviour is
investigated by using experimental studies existed in
the literature. In addition, application details are
given for the proposed strategies.
In this study, various retrofitting proposalsare
presented for a building with inefficient earthquake
safety by using Sta4CAD structural analysis
software and the cost analyses for each proposalare
calculated by using OSKA approximate costanalysis
software.
The results obtained from these proposals are
compared to eachother and the existing structure.
The results showed that the retrofitting proposal
including shear walls both outer and inner axes
yielded more appropriate solution in terms of
strength and cost.
Details
| Other ID | JA25AY63KA |
|---|---|
| Journal Section | Articles |
| Authors | |
| Publication Date | December 1, 2015 |
| Submission Date | December 1, 2015 |
| Published in Issue | Year 2015 Volume: 6 Issue: 2 |