Situation 3: A6 m long fix-ended concrete beam has a width of 310 mm and an overall depth of 480 mm. The beam is reinforced with 4-28 mm diameter bars at the bottom and 2-28 mm bars on top. Steel cover measure from the center of the bar is 70 mm. f'c- 28 Mpa and fy-415 Mpa. Total dead load including beam weight is 22 kN/m. Assuming the analysis is Doubly-reinforced beam. 7. Determine the depth of compression block in mm. 8. Determine design ultimate moment of the section if reduction factor is 0.90. 9. Determine the additional concentrated live load can carry at the midspan.

1/ Calculate maximum deflection of the beams  (This was solve it) 2/ Check the suitability of the section assuming the code limitation of L/240. 3/ If maximum deflection doesn’t meet the code requirement, propose your solution

A 300mm x 425 rectangular beam is reinforced for tension only with 4-28mm bars. The beam has a concrete cover of 40mm and a stirrup of 10mm diameter bar. The beam carries a live load and a dead load (without its self-weight). Given that unit weight of concrete is 24kN/ cu.m f'c = 21 MPa and fy = 414 MPa, calculate the additional concentrated live load as shown in the figure.

If column AB is made from high strength pre-castconcrete and reinforced with four 20 mm diameter A-36steel rods, determine the maximum allowable floorloadings P. The allowable normal stress for the highstrength concrete and the steel are (ϭallow)con = 18 MPaand (ϭallow)st= 170 MPa, respectively.