Çelik Yapıların İlerlemeli-Aşamalı Göçme ve Dayanıklılık Analizi

Yıl 2025, Cilt: 40 Sayı: 2, 429 - 444, 02.07.2025

Jülide Yüzbaşı

https://doi.org/10.21605/cukurovaumfd.1694613

Öz

Bu çalışma, Uygulamalı Elemanlar Yöntemi (AEM) kullanılarak beş katlı, üç boyutlu bir çelik moment taşıyıcı çerçevenin ilerlemeli göçme davranışını incelemektedir. Model, geçmişte ABD'de bulunan mevcut çok katlı bir çelik yapıyı, gerçekçi geometrik ve yapısal özellikleriyle temsil etmektedir. Yapısal sistem, rijit kiriş-kolon birleşimleriyle tam moment aktarımı sağlayan bağlantılardan oluşmaktadır. Taşıyıcı sistemin geometrisi, boyuna yönde yedi, enine yönde üç açıklıktan oluşmakta olup, açıklık genişlikleri düzensiz ve kat yükseklikleri değişkendir—bu durum, gerçekçi bir yüksek yapı düzenini yansıtmaktadır. Üç kritik kolon kaybı senaryosu modellenmiştir: (1) kısa kenarın ortası, (2) uzun kenarın ortası ve (3) birinci kattaki köşe kolonu. AEM, yüksek derecede doğrusal olmayan davranışları simüle etmek için kullanılmıştır. Uzun kenarın ortasındaki kolonun kaldırılması en büyük yer değiştirmelere yol açmıştır. Bu durum kolon konumunun ilerleyici göçme hassasiyeti ve yapısal dayanıklılık üzerindeki belirleyici etkisini ortaya koymuştur.

Anahtar Kelimeler

Çelik yapılar , İlerlemeli-aşamalı göçme , Depremler , Doğrusal olmayan dinamik analiz , Katı cisimler mekaniği

Progressive Collapse and Robustness Analysis of Steel Structures

Öz

This study investigates the progressive collapse behavior of a five-story, three-dimensional steel moment-resisting frame using the Applied Element Method (AEM). The model represents an existing multi-story full-scale steel structure located in the United States once, incorporating realistic geometric and structural characteristics. The structural system comprises rigid beam-to-column connections, ensuring full moment transfer across joints. The frame geometry includes seven spans in the longitudinal direction and three spans in the transverse direction, with non-uniform bay widths and varying story heights, reflecting a realistic high-rise configuration. Three critical column removal scenarios were modeled: (1) the middle of the short side, (2) the middle of the long side, and (3) a corner column at the first story. AEM was adopted to simulate highly nonlinear phenomena. Removing the middle column on the long side resulted in the highest displacements, underscoring the critical influence of column location on progressive collapse vulnerability and robustness.

Anahtar Kelimeler

Steel structures , Progressive collapse (PC) , Earthquakes , Nonlinear dynamic analysis (NDA) , Solid mechanics

Kaynakça

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