In this study, A finite element model has been proposed for U section beams which represents minor axis bending. After than mesh size effect on load carrying capacity of steel U section beams has been investigated. The first part of this study based on to verify the experimental study which obtained from literature. Material models and stages of modelling explained respectively. Mesh density, the finite element model results in the real test is how effectively it has been emphasized in reaching.Bu ?al??mada, zayyf eksende e?ilme davrany?y sergileyen U kesitli kiri?lerin e?ilme davrany?ynyn sonlu eleman modeli olu?turulmu? ve ?elik U kesitli kiri?in yük ta?yma kapasitesinin nümerik hesabynda sonlu eleman ??züm a?ynyn etkisi ara?tyrylmy?tyr. Literatürden U kesitli kiri?lerle ilgili yapylmy? zayyf eksende e?ilme deney sonu?laryna ula?ylmy?tyr. Elde edilen deney verileri, bu ?aly?mada olu?turulan sonlu eleman modellerinin do?rulanmalarynda kullanylmy?tyr. Bu nedenle ?aly?mamyzda ?ncelikle bu deneysel ?aly?ma hakkynda bilgi verilmi?tir. Sonrasynda sonlu eleman modelleme a?amalary anlatylmy? ve bu ?aly?manyn ana konusu ve modellemenin son a?amasy olan ??züm a?y yo?unlu?u üzerinde durulmu?tur. ??züm a?y yo?unlu?unun, sonlu eleman modelinde ger?ek deney sonu?laryna ula?mada ne kadar etkin oldu?u vurgulanmy?tyr.
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