Situation #1: A reinforced concrete beam has a width of 300 mm and an overall depth of 550 mm. The beam is reinforced with five 25-mm diameter bottom bars and two 16-mm-diamter bars, both having fy = 345 MPa. Concrete strength fc' = 24 MPa. The centroid of the bars are located 65 mm from extreme concrete fibers. Unit weight of concrete = 23.5 kN/m3. The beam is simply supported over a span of 6 m and carries a superimposed deadload of 8 kN/m. Use NSCP 2010 1.1 What is the depth of compression block? 1.2 What is the stress of the compression steel? 1.3 What is the nominal capacity of the beam?

A rectangular beam has the dimensions (see Figure) b = 12 in., h - 20 in, and d 17 in. and is reinforced with three No. 9 (No. 29) bars so that As - 3.00 in. The concrete compressive strength fe is 4000 psi, and the tensile strength In bending (modulus of rupture) is 475 psi. The yield point of the steel f, is 60,000 psi. Determine the concrete compression stress at the top fiber caused by a bending moment M- 10 ft-kips. 9- 6.78 in, I= 4067 in, Es= 29000000, E = 3600000 17 in. 20 in. 3 #9 bars (A, - 3.00 in.?) 3 in. -12 in- Select one: a. 390 psi b. 1390 psi c. 200 psi d. 250 psi

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.

A rectangular reinforced concrete beam has a length of 14 m is simply supported atboth ends. The width of beam is 350mm and the overall depth is 550  mm. Determine the area of the steel reinforcements if the beam is to carry a DL = 15kN/m and LL =18kN/m. The concrete strength fc = 25  and steel yield fy = 400 ������. Use 60 mm concretecover.