question archive A concrete beam with a rectangular section, 150mm wide and 300mm deep is stressed by 3 cables, each carrying an effective force of 200 kN
A concrete beam with a rectangular section, 150mm wide and 300mm deep is stressed by 3 cables, each carrying an effective force of 200 kN
Subject:Civil EngineeringPrice: Bought3
A concrete beam with a rectangular section, 150mm wide and 300mm deep
is stressed by 3 cables, each carrying an effective force of 200 kN. The span of the beam is 12m. the first cable is parabolic with an eccentricity of 50mm below the centroidal axis at the center of the span and 50mm above the centroidal axis at supports. The second cable is parabolic with zero eccentricity at the supports and 50mm eccentricity below the centroidal axis at the center of span. The third cable is straight with a uniform eccentricity of 50mm below the centroidal axis. If the beam supports a uniformly distributed live load of 6 kN/m and Ec = 38 kN/mm2. The density of concrete is 25 kN/m3 . Estimate the instantaneous deflection at the following stages. a. Prestress + self weight of the beam. b. Prestress + self weight + live load
