Effects of infill wall thickness and arrangement on the seismic performance of the reinforced concrete frames

Year 2024, Volume: 9 Issue: 2, 58 - 70, 30.08.2024

Esra Akcan , Esra Mete Güneyisi

https://doi.org/10.46578/humder.1483849

Abstract

In this study, it is aimed to investigate the seismic behavior of the reinforced concrete (RC) frames with and without infill walls having different thickness and arrangement. To this, 3, 4, 5, 6, and 7 story RC frames consisting of 4 and 5 bays were studied. Infill walls were introduced into the frame models by considering four different arrangements over the height of the structure such as full infill frame (FIF), full infill frame with soft story (FI-SSF), exterior bay infill frame (EBIF), and exterior bay infill frame with soft story (EBI-SSF). For each case, four different infill wall thicknesses of 10 to 25 cm were taken into account. Thus, a total of 170 different frame models with and without infill walls were investigated thorough nonlinear static analysis method by means of SAP 2000 program. The infill panels were modeled by utilizing equivalent diagonal compression strut. As a result of the analyses, the capacity curves of the structures, maximum base shear force, initial stiffness, and mechanism of the plastic hinge formation in the structures were determined and comparatively discussed. It was observed that both wall thickness and arrangement have significant impact on the lateral load carrying capacity and hinge formation of the case studied structures, on the other hand, with their compatible choice the greatest seismic performance could be achieved.

Keywords

Infill Wall, Equivalent diagonal compression strut, Reinforced concrete frames, Nonlinear static analysis

Dolgu duvar kalınlığı ve düzeninin betonarme çerçevelerin sismik performansına etkisi

Abstract

Bu çalışmada, farklı kalınlık ve düzenlemeye sahip dolgu duvarlı ve duvarsız betonarme çerçevelerin sismik davranışının araştırılması amaçlanmaktadır. Bunun için 4 ve 5 açıklıktan oluşan 3, 4, 5, 6 ve 7 katlı betonarme çerçeveler incelenmiştir. Dolgu duvarlar, yapı yüksekliği boyunca tam dolgulu çerçeve, yumuşak katlı tam dolgulu çerçeve, dış açıklıklarda dolgulu çerçeve ve yumuşak katlı dış açıklıklarda dolgulu çerçeve olmak üzere dört farklı düzenleme dikkate alınarak çerçeve modelleri oluşturulmuştur. Her bir durum için 10 ile 25 cm arasında değişen dört farklı dolgu duvar kalınlığı dikkate alınmıştır. Böylece SAP 2000 programı kullanılarak dolgu duvarlı ve duvarsız olmak üzere toplam 170 farklı çerçeve modeli doğrusal olmayan statik analiz yöntemiyle incelenmiştir. Dolgu duvar panelleri eşdeğer diyagonal basınç çubuğu kullanılarak modellenmiştir. Analizler sonucunda yapıların kapasite eğrileri, maksimum taban kesme kuvveti, başlangıç rijitliği ve yapılarda plastik mafsal oluşum mekanizması belirlenerek karşılaştırmalı olarak sonuçlar irdelenmiştir. İncelenen yapıların hem duvar kalınlığının hem de çerçeve içerisindeki düzeninin yanal yük taşıma kapasitesi ve mafsal oluşumu üzerinde önemli etkiye sahip olduğu, diğer taraftan bu parametrelerin uyumlu seçimi ile en yüksek sismik performansın elde edilebildiği görülmüştür.

Keywords

Dolgu duvar, Eşdeğer diagonal basınç çubuğu, Betonarme çerçeveler

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