Yumuşak Kat Etkisine Sahip Betonarme Bir Yapının Sürtünme Tipi Sönümleyicilerle Güçlendirilmesi

Abstract

Bu çalışmada, Türkiye Bina Deprem Yönetmeliği 2018 (TBDY 2018) kapsamında yumuşak kat özelliği taşıyan mevcut bir betonarme yapının deprem performansının belirlenmesi ve sürtünme tipi sönümleyici kullanılarak güçlendirilmesi ele alınmıştır. Çalışma kapsamında, planda her iki yönde üç açıklıklı olarak tasarlanan yapı beş kattan oluşmaktadır. Zaman tanım analizleri sonucunda, referans yapının kolonlarının %87,5’inin TBDY 2018 hasar sınırlarını karşılamadığı; ayrıca yumuşak kat düzensizliği nedeniyle zemin kat ηki değerlerinin ortalamasının sınır değerden %310 oranında daha fazla olduğu tespit edilmiştir. Bu sorunu çözmek amacıyla yapının zemin katına X ve Y yönlerinde ikişer adet sürtünme tipi sönümleyici eklendiğinde, kolonlardaki hasar durumlarının TBDY 2018 sınır şartlarını sağladığı ancak ηki değerleri ortalamasının %130 oranına düştüğü tespit edilmiştir. Sönümleyici sayısı her yön için dörde çıkarılıp kayma yükü kapasiteleri arttırıldığında ise hasar gözlenmemiş ve yumuşak kat düzensizliği ortadan kalkmıştır.

Keywords

• Yumuşak Kat düzensizliği
• Sürtünme tipi sönümleyici
• Betonarme yapı

Seismic Retrofitting of a Reinforced Concrete Structure with Soft-Story Irregularity Using Friction-Type Dampers

Abstract

This study investigates the seismic performance of an existing reinforced concrete building with a soft-story irregularity in accordance with the Turkish Building Earthquake Code 2018 (TBEC, 2018), and its retrofitting using friction-type dampers. Within the scope of the study, the building, designed with three spans in each direction in the plan, consists of five stories. As a result of the time-history analyses, it was determined that 87.5% of the columns in the reference structure did not meet the damage limits specified in TBEC 2018. Furthermore, due to the soft-story irregularity, the average ηki values at the ground floor exceeded the limit value by 310%. To address this issue, two friction-type dampers were added in both the X and Y directions at the ground floor. It was found that the damage levels in the columns satisfied the TBEC 2018 limit requirements; however, the average ηki values were reduced only to 130%. When the number of dampers was increased to four per direction and their shear capacities were enhanced, no damage was observed, and the soft-story irregularity was eliminated.

Keywords

• Soft Story Irregularity
• Friction Type Damper
• Performance Based Design

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