Effect of The Steel Wired Mesh On the Shear Behavior of RC Beams

Yıl 2019, , 477 - 487, 31.01.2019

Serhat Demır

https://doi.org/10.29130/dubited.461843

Öz

Ferro-cement made of steel wired mesh and cement mortar is a method using for strengthening of existing
reinforced concrete structures. In this study, the effects of the steel wired mesh on the shear behavior of reinforced
concrete beams were investigated experimentally. For this purpose, three reinforced concrete beams having
150x300x2000 mm dimensions and different reinforcements were produced and subjected to four point bending
tests. As a result, steel wired mesh improved the cracking mechanism of the beam by reducing the number of large
cracks while increasing minor cracks. However, the use of steel wired mesh has caused early strength loss of the
cracked beam. In the case of the usage of steel wired mesh in addition to the stirrups as shear reinforcement, the
load bearing capacities, initial stiffness and displacement ductility of the reinforced concrete beams have
significantly increased.

Anahtar Kelimeler

Steel wired mesh, Four point bending test, Reinforced concrete beam

Çelik Tel Örgülerin Betonarme Kirişlerin Kesme Davranışına Etkisi

Öz

Çelik tel örgülerin çimento hamuruyla birlikte uygulanması neticesinde meydana gelen ferro-çimento, mevcut
betonarme yapı elemanlarının güçlendirilmesinde kullanılan bir yöntemdir. Bu çalışmada ise, çelik tel örgülerin
kesme donatısı olarak kullanılmasının betonarme kirişlerin davranışlarına etkileri deneysel olarak araştırılmıştır.
Bunun için 150*300*2000 mm ebatlarında ve farklı donatı düzenine sahip üç adet betonarme kiriş üretilerek dört
nokta eğilme testine tabi tutulmuştur. Sonuçta, çelik tel örgülerin kirişin çatlama mekanizmasını iyileştirerek geniş
çatlakları azaltıp kılcal çatlakları artırdığı görülmüştür. Ancak, kesme donatısı olarak yalnızca çelik tel örgü
kullanımı çatlamış kirişte erken dayanım kaybına neden olmuştur. Kesme donatısı olarak etriyelere ilaveten çelik
tel örgülerin kullanılması durumunda ise betonarme kirişlerin yük taşıma kapasiteleri, başlangıç rijitlikleri ve
yerdeğiştirme süneklikleri önemli oranda artmıştır.

Anahtar Kelimeler

Çelik tel örgü, Dört nokta eğilme deneyi, Betonarme kiriş

Kaynakça

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