Fikret MEHDİ, Adem DOĞANGÜN, Yasin FAHJAN

YÜKSEK BİNALARIN DİNAMİK TEPKİ ANALİZİ İÇİN DALGA YAYILIMININ İRDELENMESİ

Bu çalışmanın amacı, sismik dalga yayılımı olgusunu dikkate almanın yüksek binaların dinamik tepkisi üzerindeki etkisini sayısal olarak araştırmaktır. Bir çekirdek duvar ve bir çerçeve, dalga yayılımı olgusu göz önünde bulundurularak ve göz ardı edilerek sismik yükleme altında analiz edilmiştir. Analiz edilen her iki sistem için eğilme momenti, kesme kuvveti, eksenel kuvvet ve katlar arası ötelenme değerlendirilmiştir. Farklı katlardaki dinamik tepki için genlik Fourier tepki spektrumları da tartışılmıştır. Her biri kırk altı katlı, her iki sistem de sabit tabanda enine ve boyuna sismik dalgalara maruz bırakılmıştır. Sonuçlar, dalga yayılım fenomeni göz önüne alındığında, katlar arası sürüklenme, kesme kuvveti ve eğilme momentinde hafif bir azalma sağladığını göstermektedir. Dalga yayılım olgusunun dikkate alınmasının, özellikle üstteki üçüncü bölümün katlarındaki çekirdek duvar için eksenel kuvveti önemli ölçüde arttırdığı bulunmuştur. Bu makalenin ana katkısı, kategorize edilemeyen ve her farklı detayın farklı bir tepkiyi tetikleyebileceği "kod dışı" binalar olan yüksek binalarda dalga yayılımı olgusunu dikkate almaya yönelik büyük ihtiyacı vurgulamaktır. Daha da önemlisi, dalga yayılım fenomeninin temel fiziğini doğru bir şekilde yakalamak ve analizi hassas bir şekilde gerçekleştirmek için standart analiz ve tasarım mühendislik yazılımlarını yükseltme ihtiyacıdır.

Anahtar Kelimeler:

Dalga yayılımı, basınç dalgası, kayma dalgası, deprem dalgası, yüksek yapılar, sayısal modelleme

Wave Propagation Approach for Dynamic Response Analysis of High-Rise Buildings

This paper numerically investigates the impact of considering the seismic wave propagation phenomenon on the dynamic response of high-rise buildings. A core wall and a frame are analyzed under seismic loading considering wave propagation phenomenon and ignoring it. The bending moment, shear force, axial force, and inter-story drift for both analyzed systems are evaluated. The amplitude Fourier response spectra for the dynamic response at different stories are discussed as well. Forty-six stories each, both systems are subjected to transverse and longitudinal seismic waves at the fixed base. The results show that considering the wave propagation phenomenon yields a slight decrease in the inter-story drift, shear force, and bending moment. It is found that considering wave propagation phenomenon increases the axial force significantly, especially for the core wall at the floors of the top third part. It is worth pointing out that high-rise buildings cannot be categorized, and every single different detail can trigger a different response. Thus, the main contribution of this paper is to highlight the drastic need to consider wave propagation phenomenon in such "out of code" buildings. The more important is a need to upgrade the standard analysis and design engineering packages to accurately capture the essential physics of the wave propagation phenomenon and perform the analysis precisely.

Keywords:

Wave propagation, compression wave, shear wave, earthquake wave, high rise buildings, and numerical analysis.,

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