Calculate the corresponding depth of neutral axis from the extreme concrete compression fiber in a reinforced concrete beam 420 deep reinforced with bars 20-mm in diameter enclosed with 10-mm-dia stirrups when the tensile steel strain is 0.008 and concrete compression strain is 0.003.  f'c = 22 MPa.  Express your answer in 2 decimal places only in mm.

A rectangular reinforced concrete beam with width of 250 mm and effective depth of 500 mm is subjected to 150 kN-m bending moment. The beam is reinforced with 4-25 mm o bars. Use alternate design method and modular ratio n = 9. 1. What is the maximum stress of concrete? 2. What is the maximum stress of steel? 3. What is the total compressive force in concrete? b = 250 009=P -0000- b = 250 d-x nA. 4-25 mm Ø ΝΑ

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 stress in the steel caused by a bending moment M = 10 ft-kips. 9 - 6.78 in, I- 4067 in, Es = 29000000, E - 3600000 L17 in. 20 in. 3 #9 bars (A, - 3.00 in.) 3 in. -12 in.- Select one: a. 2525 psi b. 2412 psi C. 2615 psi d. 2817 psi

answer only d and e

A rigid steel plate is supported by three posts of high-strength concrete each having an effective cross-sectional area A = 40,000 mm2 and length L = 2 m (see figure). Before the load P is applied, the middle post is shorter than the others by an amount s = 1.0 mm. The allowable compressive stress in the concrete is 20 MPa and E of concrete is 30 GPa. What is the minimum load P (kN) needed to close the gap? P S

The concrete post is reinforced axially with four symmetrically placed steel bars, each of cross-sectional area 900 mm2. Compute the stress in each material when the 1000-kN axial load is applied. The moduli of elasticity are 200 GPa for steel and 14 GPa for concrete. Compatibiltiy Equation . Ust Bearing |1000 kN plate Steel- Concrete 300 mm 300 mm Section a-a

i need the answer quickly

21. The column of reinforced concrete is loaded with P = 8000 lbs. The modulus of elasticity (E) is 4.2E6 psi and the Poisson ratio is 0.15. 16in 16in What is the normal stress along section b-b? a. -15.625 psi b. -7.81 psi c. -2.60 psi d. -11.04 psi

#2 will answer. Please use correct DECIMAL PLACES and UNITS. Thanks

A rectangular steel block is 75 mm in the x-direction, 50 mm in the y-direction and 100 mm in the z direction. The block is subjected to triaxial loading consisting of three uniformly forces as follows: KN tension in the x-direction, 250 KN compression in the y-direction, and 240 KN tension in the z-direction. If u = 0.3 andE = 200 GPa, Determine the total resulting strain in the x- direction. %3D