Stress distribution as a cause of industrial steel chimney root section failure

Abstract

Ovaj rad razmatra iniciranje otkaza korene sekcije industrijskog čeličnog dimnjaka visine 60 m. Prsline nastale u čeličnoj strukturi spoljašnjeg plašta dimnjaka značajno su uticale na integritet strukture. Izvršena je analitička i numerička analiza pojave prslina. Analiza metodom konačnih elemenata ukazala je na postojanje zona sa visokom koncentracijom napona. Identifikovane zone poklopile su se sa mestima na kojima je došlo do iniciranja prslina. Rezultati analize razjasnili su uzroke otkaza i omogućili izradu programa sanacije i dalje mere održavanja dimnjaka.This paper has studied failure initiation of the root section of 60 m tall industrial steel chimney. Cracks that occurred in steel wall of the wind shield have significantly influenced integrity of the structure. Analytical and numerical analysis of failure occurrence was performed. Location of extreme stress values in the steel structure were identified numerically by finite element method. Identified locations coincided with the location of the cracks initiation. The results of analysis identified causes of the failure initiation and allowed expression of the recommendation for root redesign and further maintenance procedures

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