Çift yönlü deprem yüklemeleri altında eksentrik binalar için yapısal hasarlara karşı bina performansını artırmak için farklı çapraz destek profilleri yerleşimlerinin analizi: Bir vaka çalışması

Çapraz Destek Profilleri (ÇDP), günümüzde özellikle eksantrik binaları deprem esnasında burulmaya karsı korumak için kullanılan yöntemlerden biridir. Bu yöntem, aktif / pasif Ayarlı Kütle Damperleri (AKD) gibi karmaşık kontrol sistemlerine kıyasla, mevcut ve yeni binalar için daha iyi bir sismik korumaya katkıda bulunmak için yaygın olarak kullanılır. Çünkü yapımı kolaydır ve uygulaması diğer yöntemlere göre daha ucuzdur. Bu nedenle, bu araştırmada, önceden belirlenmiş en iyi üç ÇDP yerleşimleri seçilerek, iki yönlü sismik yükler altında sismik analizleri, 1940'da El Centro, 1994'te North-Ridge ve Kocaeli 1999 deprem dataları altında yapılmıştır. Elde edilen sonuçlara göre ÇDP'ler yapıya yerleştirilirken Durum 3’teki gibi doğru bir mühendislik tasarım perspektifi ile birlikte yapıda burulma tepkilerini (yaklaşık olarak %30 ile %50 arasında) azaltarak yapı planındaki eksantrikliği önemli ölçüde ortadan kaldırabilirken, doğru tasarım vizyonu ile yerleştirilmeyen ÇDP'ler yani Durum 1 ve Durum 2’da olduğu gibi burulma etkilerini bazı yükleme durumları için azaltacak kadar başarılı olamamışlardır. Bu nedenle, yapısal tepkileri en aza indirmek için ÇDP’leri yapıya entegre etmek, doğru mühendislik perspektifi ile yapılmalıdır. Aksi takdirde ÇDP’ler yapıdaki burulma düzensizliği etkilerini azaltmadığı gibi binada burulmadan dolayı oluşabilecek yapısal hasar olasılığının da artmasına neden olabilmektedir.

Analysis of different cross-frame placements to enhance torsional irregular buildings against structural failure under earthquake bidirectional loadings: A case study

Cross bracing frames (CFs) are employed as traditional passive energy dissipating devices, which are placed into the moment-resisting frames of the Benchmark building picked for analysis purposes. These devices are widely used, easy to construct, and inexpensive to contribute better seismic protection for existing and new buildings than complex control systems like active/passive Tuned Mass Dampers (TMDs) and so on. Therefore, in this research, the best three-predetermined CFs placements are selected. The time history analyses are made under bi-directional seismic loads such as two orthogonal excitations of El Centro in 1940, North-Ridge in 1994, and Kocaeli, Turkey in 1999. In conclusion, obtained results find out that while CFs placements into the structure can be significantly eliminating the eccentricity in the structure plan by dissipating especially torsional responses (approximately between 30% and 50% decrease) with a right engineering design perspective like Case 3, they cannot be successful enough to reduce the torsional responses without the right design vision such as Case 1 and Case 2. Therefore, Integrating CFs placements to the structure for minimizing the structural response is not always comprehensive to make the structure durability against torsional irregularity unless placed with the right engineering decision.

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