Etriyesiz Dış Kiriş-Kolon Birleşim Bölgesi için Kesme Dayanımı Tahmini

Çerçeve türü yapıların sismik yük altında sünek davranış sergilemesi kiriş-kolon birleşim bölgelerinin depremdenkaynaklı olarak açığa çıkan reaksiyon kuvvetlerini sağlıklı bir şekilde aktarmasına bağlıdır. Ancak yüksekkesmeye maruz kalan birleşim bölgelerinde etriye sıklaştırması yapılırken çeşitli sorunlarla karşılaşılmakta ve busebeple de etriyeler gerektiği gibi yerleştirilememektedir. Sonuç olarak pek çok yapıda kiriş-kolon birleşimbölgesinde yetersiz etriye miktarı sebebi ile hasarlar meydana gelmektedir. Mevcut çalışmada, etriyesiz dış kirişkolon birleşim bölgelerinin kesme dayanımlarının belirlenmesi amacıyla yapılmış olan deney verileri derlenmişve bu verilere bağlı olarak birleşim bölgesinin kesme dayanımına etki eden temel parametreler belirlenmiştir. Buparametreler: efektif birleşim bölgesi genişliği, beton silindir basınç dayanımı, eksenel kuvvet oranı ve kiriş efektifalanının kolon efektif alanına oranıdır. Söz konusu parametrelerden yola çıkılarak etriyesiz dış kiriş-kolon birleşimbölgelerinin kesme dayanımını hesaplamak amacıyla bir denklem önerilmiştir. Önerilen denklem literatürde yeralan ve aynı amaçla üretilmiş denklemlerin sonuçları ile karşılaştırılmıştır. Önerilen denklemin diğer denklemsonuçlarına kıyasla deney sonuçları ile daha uyumlu sonuçlar verdiği görülmüştür.

Shear Strength Prediction for Exterior Beam-Column Joint

The ductile behavior of frame structures under seismic load is due to the healthy transfer of which reaction forces generated by the earthquake in the beam-column joints. However, in the joint areas which are exposed to high shear, various problems are encountered while concentrating the stirrups and therefore the stirrups cannot be placed properly. As a result, damages occur in many structures due to insufficient amount of stirrups in the beam-column joint areas. In the present study, the experimental data which was made in order to determine the shear strength of the external beam-column joint areas without stirrups were compiled and the basic parameters affecting the shear strength of the joint area were determined. These parameters are: the effective joint area width, the concrete cylinder compressive strength, the axial force ratio, and the ratio of the effective area of beam to the column effective area. Based on these parameters, an equation has been proposed in order to calculate the shear strength of the external beam-column joint areas without stirrup. The proposed equation has been compared with the results of the equations produced in the literature for the same purpose. It was found that the proposed equation gave results more consistent with the results of the experiments compared to the results of other equations.

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