Vol.3, No 2, 2005 pp. 137 - 143
UDC 624.011.1:624.042(045)=20

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OPTIMAL DESIGN OF TIMBER BEAM
Dragoslav Stojić, Srđan Živković
University of Niš, Faculty of Civil Engineering and Architecture, Serbia and Montenegro

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Abstract. In modern timber structures a large number of beams are loaded with bending. Contemporary engineering practice has shown that the effect of tangential stress and deflection of beams are not controlled during the design of this kind of beams. This could produce negative consequences in structure behavior during the exploitation. Using optimal design procedure in this article, the member is designed for bending in two planes. The following criteria must be observed: normal bending stress, shear stress and maximal deflection.
Key words: timber structures, bending, optimal design

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OPTIMALNO DIMENZIONISANJE NOSAČA OD DRVETA U savremenim drvenim konstrukcijama veliki broj nosača je opterećen na pravo savijanje. Dosadašnja inženjerska praksa je pokazala da se, veoma često, prilikom dimenzionisanja ovakvih nosača u praksi ne kontrolišu uticaji tangencijalnih napona i ugiba nosača, što može izazvati negativne posledice na ponašanje konstrukcije za vreme njene eksploatacije.
Koristeći proceduru optimizacije, ovaj rad razmatra štap pod takvim opterećenjem. Pri tome je korišćen uslov iskorišćenja dopuštenih normalnih napona savijanja, smičućih napona i maksimalnog ugiba.