he internal axial force and bending moment acting on a cross-section of a 10" diameter concrete column is 12 kips and 3 kip-ft, respectively. What is the maximum compressive stress on the cross-section to the nearest psi?

Find the minimum required area of the steel bearing plate so that the stresses are not exceeded.

2.9 A beam cross section is a rectangle 16"x18". Calculate its section modulus and maximum bending stress for a bending moment of M = 40 ft-kips. Concrete maximum tension strength is 360 psi. Determine if this beam would crack under the indicated bending moment.

A standard brick (dimensions 8 in. x 4 in. x 2.5 in.) is compressed lengthwise by a force P, as shown in the figure. 8 in. 4 in. 2.5 in. If the ultimate shear stress for brick is 1,753 psi and the ultimate compressive stress is 4,300 psi, what force Pmax is required to break the brick? (Enter the magnitude in Ib.) Ib

Maximum strain in concrete taken for design is 0.0040 while strain in deformed bar is calculated with an offset at 0.0015. A beam has an effective depth of 550 mm and is reinforced with Fe415 steel. What would be the value of limiting neutral axis depth (in mm) for this beam?

the last part is where I'm having trouble..

Calculate the uniform load w (in addition to the beam weight) that will cause the section shown to begin to crack if used as a 28-ft simply supported beam. Use normal weight concrete with L=4000 psi. f = 60,000 psi, E₁=29,000 ksi, and the reinforced concrete weight = 150 lb/ft³. 4 in. 28 ft 4 in. 22 in. 30 in. 2 in. 2 in. 3 #9 ● ||—12 in—-|

The end block of a post-tensioned beam is 100 mm x 150 mm. A prestressing cable consisting of 7 wires of 6 mm dia strand and stressed to 800 MPa has to be anchored at the center of the block. The anchorage plate is 75 mm x 75 mm. If the concrete mix is M45 and the permissible bending stress in M. S. steel plate is 165 MPa, determine the thickness of the anchorage plate.

Help 35 minutes