У раду се приказује анализа оптерећења далеководног носивог двосистемског стуба напонског нивоа 110kV према Европским Нормама. С обзиром на специфичност оптерећења које дјелује на далеководни носиви стуб велика труд се мора посветити анализи оптерећења и усвајању случајева оптерећења. Анализирана конструкција је решеткасти челични стуб висине 41,50m са три пара конзола. Након тога, приказује се и дискутује поређење резултата добијених према Европским Нормама са резултатима добијеним према Југословенским стандардима.
This paper presents the procedure for the experimental determination of the horizontal deflection of a point due to the horizontal force effects on the model made of Plexiglas with proportionally the same geometry as the numeric example applied in works of several authors for the analysis of the tall building cores. This examination offers the experimental analysis possibility of the reinforced-concrete core on effects of the horizontal load of seismic forces and the wind. These results are compared with the results obtained by FEM showing significant agreement.
Experimental research on axially compressed columns made from reinforced concrete (RC) and RC columns strengthened with a steel jacket and additional fill concrete is presented in this paper. A premade squared cross-section RC column was placed inside a steel tube, and then the space between the column and the tube was filled with additional concrete. A total of fourteen stub axially compressed columns, including nine strengthened specimens and five plain reinforced concrete specimens, were experimentally tested. The main parameter that was varied in the experiment was the compressive strength of the filler concrete. Three different concrete compression strength classes were used. Test results showed that all three cross-section parts (the core column, the fill, and the steel jacket) worked together in the force-carrying process through all load levels, even if only the basic RC column was loaded. The strengthened columns exhibited pronounced ductile behavior compared to the plain RC columns. The influence of the test parameters on the axial compressive strength was investigated. In addition, the specimen failure modes, strain development, and load vs. deformation relations were registered. The applicability of three different design codes to predict the axial bearing capacity of the strengthened columns was also investigated.
УВОДВећ годинама постоји тежња да се својства дрвета као инжењерског материјала побољшају, да се смањи његова анизотропија и остала непожељна својства. Развијају се нови производи на бази дрвета а термичком и хемијском модификацијом мењају се физичко-механичке карактеристике дрвета.Захваљујући бољем познавању дрвета као материјала, примени савремених дрвених конструкција и употребом квалитетних спојних средстава дрво се све више примењује у изградњи модерних архитектонских грађевина (спортских објеката, стамбених зграда, мостова...). Конструктивни елементи савремених дрвених конструкција базирани су првенствено на савременим производима од дрвета као што су лепљено ламелирано дрво и унакрсно ламелирано дрво.
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