IMPROVING EARTHQUAKE RESISTANCE IN RC BUILDINGS VIA STEEL BRACING MEMBERS

Öz

In this study, the effect of retrofitting with steel bracing members on the seismic behavior of reinforced concrete buildings was examined. A reinforced concrete building with low concrete strength was modeled for the numerical study. This modeled building was strengthened with steel X-braced members to create a total of two buildings. To evaluate the seismic behavior of the modeled buildings, incremental dynamic analyses were performed using static pushover analysis and 11 different earthquake records. Due to the symmetrical structure of the modeled buildings, a total of 220 analyses were carried out simultaneously in the x and y directions. As a result of the analysis, the capacity curves of the existing building and the strengthened building with steel bracing members, maximum responses, inter-storey drifts, and fragility curves according to the damage status were obtained. As a result of the analysis, it was determined that the maximum response of the building strengthened using X steel cross members increased significantly compared to its current state, while the damage to the structural elements was significantly reduced.

Anahtar Kelimeler

• RC buildings
• Pushover analysis
• Incremental dynamic analysis
• Fragility curve
• Inter-storey drift

ÇELİK DESTEK ELEMANLAR İLE BETONARME BİNALARDA DEPREM DAYANIKLILIĞININ ARTIRILMASI

Öz

Bu çalışmada, çelik çapraz elemanlarla güçlendirmenin betonarme binaların deprem davranışına etkisi incelenmiştir. Sayısal çalışma için düşük beton dayanımına sahip betonarme bir bina modellenmiştir. Modellenen bu bina X çelik çapraz elemanla güçlendirilerek toplam iki bina oluşturulmuştur. Modellenen binaların deprem davranışını değerlendirmek için statik itme analizi ve 11 farklı deprem kaydı kullanılarak artımlı dinamik analizler yapılmıştır. Modellenen binaların simetrik yapısı nedeniyle x ve y yönlerinde eş zamanlı olarak toplam 220 adet analiz yapılmıştır. Analiz sonucunda mevcut binanın ve çelik çapraz elemanlarla güçlendirilen binanın kapasite eğrileri, maksimum tepkileri, göreli kat ötelemeleri ve hasar durumlarına göre kırılganlık eğrileri elde edilmiştir. Yapılan analiz sonucunda, X çelik çapraz elemanlar kullanılarak güçlendirilen binanın mevcut durumuna göre maksimum tepkisinin dikkate değer şekilde arttığı, bununla birlikte yapısal elemanlarda oluşan hasarın ise önemli ölçüde azaldığı tespit edilmiştir.

Anahtar Kelimeler

• Betonarme binalar
• İtme analizi
• Artımsal dinamik analiz
• Kırılganlık eğrisi
• Göreli kat ötelemeleri

Kaynakça

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