Bu çalışmada, yapısal analizlerde sıklıkla kullanılan yayılı ve yığılı plastisite yöntemlerinin, yapıların doğrusal olmayan davranışı üzerindeki etkileri incelenmiştir. Yayılı plastisite yönteminde, kesit davranışını daha gerçekçi biçimde temsil eden integrasyon sayısı ve mafsal boyu gibi parametrelerin; yığılı plastisite yönteminde ise etkin kesit rijitliklerinin sistem davranışına olan etkileri değerlendirilmiştir. Beş katlı bir çerçeve sistem üzerinde gerçekleştirilen sayısal analizler sonucunda, küçük hücrelerden oluşan kesitlere sahip eleman sayısının (dolayısıyla integrasyon sayısının) azaltılmasının taban kesme kuvvetlerinde %12’ye, göreli kat ötelemelerinde ise %20’ye varan değişimlere sebep olduğu belirlenmiştir Ayrıca, yığılı plastisite modellerinde eleman etkin kesit rijitliklerinin değişmleri durumunda, taban kesme kuvvetlerinde %47’ye, maksimum göreli ötelemelerde ise %90’a ulaşan oranlarda farklılıklar gözlenmiştir. Dokuz farklı model üzerinde yapılan karşılaştırmalar sonucunda, periyot, kat ötelemesi, donatı uzaması–beton kısalması, plastik dönme değerleri, analiz süreleri ve taban kesme kuvvetleri gibi parametrelerde farklılıklar elde edilmiştir. Elde edilen bulgular, her iki yöntemin farklı analiz koşullarında yapısal davranış üzerinde önemli etkiler yarattığını ortaya koymaktadır.
TBDY 2018 Doğrusal Olmayan Analiz Yığılı Plastisite Yayılı Plastisite Etkin Kesit Rijitliği
This study investigates the effects of widely used distributed and lumped plasticity methods on the nonlinear behavior of structures. In the distributed plasticity approach, the influence of parameters such as the number of integration points and the plastic hinge length which allow a more realistic representation of sectional behavior was evaluated, whereas in the lumped plasticity approach, the effects of effective section stiffness on the overall system response were examined. Numerical analyses conducted on a five-story frame system revealed that reducing the number of elements with small sectional (fiber) divisions and consequently the number of integration pointsled to variations of up to 12% in base shear and up to 20% in interstory drift ratios. Furthermore, in lumped plasticity models, variations in effective section stiffness resulted in differences of up to 47% in base shear and up to 90% in maximum interstory drift. Comparative analyses of nine different models demonstrated variations in key structural parameters such as period, story drift, reinforcement elongation–concrete shortening, plastic rotation, analysis duration, and base shear. The findings indicate that both modeling approaches have a significant influence on structural behavior under different nonlinear analysis conditions.
Tbdy 2018 Nonlinear Analysis Lumped Plasticity Distributed Plasticity Effective Section Stiffness
| Primary Language | Turkish |
|---|---|
| Subjects | Reinforced Concrete Buildings, System Identification in Civil Engineering, Structural Dynamics |
| Journal Section | Research Article |
| Authors | |
| Submission Date | September 8, 2025 |
| Acceptance Date | November 16, 2025 |
| Publication Date | December 31, 2025 |
| DOI | https://doi.org/10.65520/erciyesfen.1779914 |
| IZ | https://izlik.org/JA79LK34SE |
| Published in Issue | Year 2025 Volume: 41 Issue: 3 |
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