BEHAVIOR OF THE LIGHTENED REINFORCED SOIL PANELS FILLED WITH POLYSTYRENE FOAM

Öz

Heavy precast reinforced concrete panels, which are used against the effects of active lateral earth pressure and surface stability on inclined or vertical slopes, cause serious problems during both transportation to the construction site and installation. The use of lighter elements in the production phase reduces the requirement of workmanship and increases the speed of application in addition to the ease of installation in site. Therefore, the experimental behavior of real-sized reinforced concrete specimens and lightweight specimens were investigated, which have been produced with hollow sections via expanded polystyrene foam (EPS). The load-displacement changes of specimens were presented after the completion of in-plane diagonal shear tests (panel tests) and three-point bending tests on mentioned specimens in specially designed experimental setups. EPS foam included specimens are lighter than steel-reinforced ones around 13%, which showed similar behavior in bending tests, but different failure modes stood out in panel tests. It is clearly seen that the total cost of conventional reinforced concrete panels can be reduced by a usage of alternative lightweight composite panels. As a result of the study, an alternative unique product was proposed to the conventional facing members used in mechanically stabilized earth walls and reinforced soils.

Anahtar Kelimeler

• Precast Panel
• Reinforced Soil
• Facing Member
• Lightweight Panel
• Eps Foam

KÖPÜK DOLGULU HAFİFLETİLMİŞ DONATILI ZEMİN PANELLERİNİN DAVRANIŞI

Öz

Eğimli veya dik arazilerdeki yanal toprak basıncı ve yüzey duraylılığı gibi etkilere karşı kullanılan ağır prekast betonarme paneller hem şantiyeye iletim hem de yerleştirme sırasında ciddi sorunlara neden olmaktadır. Üretim aşamasında daha hafif elemanların kullanılması arazideki montaj kolaylığına ek olarak işçilik gereksinimini azaltmakta ve uygulama hızını arttırmaktadır. Bu sebeple çalışma kapsamında, gerçek boyutlu donatılı beton numuneler ve genişletilmiş polistren köpük (EPS) elemanlar yardımıyla boşluklu kesitlerle üretilen hafif numunelerin deneysel davranışı incelenmiştir. Özel olarak tasarlanan deneysel düzeneklerde söz konusu numuneler üzerinde düzlem içi diyagonal kesme testleri (panel testleri) ve üç noktalı eğilme testleri gerçekleştirildikten sonra yük - deplasman değişimleri sunulmuştur. Çelik donatılı numunelere kıyasla yaklaşık %13 mertebesinde daha hafif olan EPS köpüklü numuneler eğilme testlerinde benzer davranış sergilerken, panel testlerinde farklı göçme durumları ön plana çıkmaktadır. Alternatif hafif kompozit panellerin kullanılmasıyla konvansiyonel donatılı beton panellerin toplam maliyetinin düşürülebileceği açıkça görülmektedir. Çalışma sonucunda mekanik stabilize donatılı duvarlarda ve donatılı zeminlerde kullanılan konvansiyonel kaplama elemanlarına alternatif özgün bir ürün önerilmiştir.

Anahtar Kelimeler

• Prekast Panel
• Donatılı Zemin
• Kaplama Elemanı
• Hafif Panel
• Eps Köpük

Kaynakça

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