BİTİŞİK NİZAM YAPILARIN ÇARPIŞMASINI ÖNLEMEK İÇİN BİR HEDEF SÖNÜM ORANI VE RÖLATİF DEPLASMAN DÜŞÜNÜLEREK OPTİMUM SÖNÜMLEYİCİ YERLEŞİMİ

Abstract

   Bu çalışmada, bitişik nizam iki yapı arasına, sönümleyiciler çarpışmayı önlemek için optimum olarak yerleştirilir. Optimizasyon problemi için yönetici denklemler zaman tanım alanında türetilir. Hedef sönüm oranı girişimli sistem için bulunur ve sayısal optimizasyon aşamasında aktif kısıtlamalar kullanılır. Sönümleyicilerin sönüm katsayıları tasarım değişkeni olarak seçilir ve sönüm katsayılarının toplamı kısıtlamalar altında minimize edilir. Deprem yükleri altında aday optimum tasarımı test etmek için zaman tanım alanında analizleri ve sayısal optimizasyonu içeren bir algoritma gösterilir. Bütün katlarda rölatif deplasmanların hedef değerlerin altına düşüp düşmediği kontrol edilir. Amaçlanan metodun geçerliliğini göstermek için 4 katlı bitişik nizam kayma çerçeveleri sayısal örnek olarak kullanılır. Bitişik yapıların arasına lineer viskoz sönümleyicilerin uygun yerleri ve sayıları hesaplanır ve onların yapısal davranış üzerindeki etkileri araştırılır.   

Keywords

• Çekiçleme,hedef sönüm oranı,ek sönümleyiciler,optimum pasif kontrol,çekiçlemenin önlenmesi

OPTIMAL DAMPER PLACEMENT TO PREVENT POUNDING OF ADJACENT STRUCTURES CONSIDERING A TARGET DAMPING RATIO AND RELATIVE DISPLACEMENT

Abstract

   In this study, viscous dampers are optimally placed between two adjacent structures with the aim of preventing pounding. Governing equations are derived in time domain for the optimization problem. Target damping ratios are obtained for the coupled system and used as active constraints in the numerical optimization stage. The damping coefficients of the dampers are chosen as design variables, and the sum of the damping coefficients is minimized under the constraints. An algorithm featuring numerical optimization and time history analysis is put forward to test the candidate optimal design under the earthquake loads of interest. The relative displacements are checked at all storey levels to ensure that they remain below the target values. Two 4-storey adjacent shear-building models are used in numerical examples to validate the proposed method. The appropriate number and locations of linear viscous dampers between adjacent structures are determined, and their effects on structural behaviour are evaluated.

Keywords

• Pounding,target damping ratio,added dampers,optimal passive control

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