Скачать с ютуб DESIGN OF SLENDER REINFORCED CONCRETE COLUMN IN EUROCODE в хорошем качестве

DESIGN OF SLENDER REINFORCED CONCRETE COLUMN IN EUROCODE

#StructuralEngineering #StructuralDesign #Column #SlenderColumn #Reinforced #ReinforcedColumns #Eurocode #Eurocode2 #BSEN1992-1-12004 #CivilEngineering #BuildingDesign #Design #Codedesign Columns are defined as structural elements that carry loads in compression. Usually they carry loads in compression and bending moments as well about one or both axes of the cross sections. Two types of columns can be classification according to EC2. A short column is one in which the ultimate load at a given eccentricity is governed only by the strength of the materials and the dimensions of the cross-section. A slender column is one in which the ultimate load is governed not only by the strength of the materials and the dimensions of the cross section but also by the slenderness, which produces additional bending moment due to lateral deformations. For eccentrically loaded the short columns behavior will follow the linear path until intersect the interaction diagram. For eccentrically loaded slender columns, the column will follow a non-linear path until intersects the interaction diagram. This means that, due to the non-linear effects the actual moment on the column is greater than the linear moment. In designing eccentrically loaded slender columns, the second-order effects are very important parameters Slender columns can be defined as columns with small cross sections compared to their lengths. Generally, slender columns have lower strength when compared to short columns, for a constant cross section, increasing the length causes a reduction in the strength.The slenderness of a column may result in the ultimate load being reduced by lateral deflections of the column caused by bending. This effect is illustrated in Fig. 1 for a particular case of an initially straight column with bending in single curvature caused by load N applied with equal eccentricity e=ee+ei at both ends. The bending deformation of the column causes the eccentricity of the load at the critical section to become (e + e2), where e2 is the additional eccentricity due to lateral deflection at that section. Hence, the maximum moment increases to N (e + e2). This is commonly referred to as the P-Δ effect. A short column is defined as one in which the ultimate load is not reduced by the bending deformations because the additional eccentricities Δ=e2 are negligible. A slender column is defined as one in which the ultimate load is reduced by the amplified bending moment caused by additional eccentricity.