In the performance analysis of existing buildings, in ductility control, the fracture type of reinforced concrete elements is classified as "ductile" if bending and "brittle" if shear is shear. While controlling the ductility of reinforced concrete elements in linear performance analysis, if the shear force value taken as the basis is greater than the shear strength, it is considered as brittle, if the shear force value taken as the basis is less than the shear strength, it is considered as a ductile element.
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ICONS
b w = Element body width
d = Element body width
f ck = Characteristic cylinder of concrete
l n = Free height of column between beams, free span ofbeambetween column or curtain faces
V e = Useful height of beam and column
V d = With vertical loads Theshear force under the joint effect of the earthquake effects calculated by takingR a = 1together,
V r =Shear strength of column, beam or wall section
M a = It is the moment value taken as basis in calculation of column shear force at the lower end of the column's stiffness height.
M ü = It is the moment value which is taken as basis in calculation of column shear force at the upper end of the free height of column.
M pi = Moment capacity at the face of the column at the left end i of the beam
M pj = Moment capacity at the column face at the right end j of the beam
( M p ) t = Moment capacity calculated at the base section of the wall
( M d) t = Bending moment under the joint effect of earthquake effects calculated by takingR a = 1together with the vertical loads at the base section of the wall
R a = Earthquake Load Reduction Coefficient
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In the pictures below, column, beam and curtain ductility checks in the evaluation of existing structures with earthquake calculation in line with the ŞGDT approach are shown.
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