30" Design the reinforcement for the T-beam in the middle which carries a live load of 200 lb/ft². The length of the beam is 25 ft. In your design assume concrete with a compressive strength of 3,000 psi density 150 lb/ft³ and Grade 60 Steel. יי27 12" 10'-0" 12" 10'-0" 12"
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- Situation: A beam has a width of 300 mm and total depth of 600 mm strength f'c-36 MPa. Steel yield strength fy=415 MPa The section is to be reinforced for tension only and the effective concrete cover is 65 mm. Which of the following most nearly gives the value of our balanced steel ratio? a. 0.00370 b. 0.03456 C. 0.02860 d. 0.03522 Which of the following most nearly gives the value of our balanced distance of the cuter most fiber of compression fiber to our neutral axis? a. 313.256 mm b. 354.68 mm C. 333.333 mm d. 322.435 mm Which of the following most nearly gives the value of our balanced depth of compression block? a. 248.412 mm b. 266.2676 mm C. 301.478 mm d. 281.261 mmA doubly reinforced concrete beam of size 250 mm x 500 mm overall depth is reinforced with 2-12 mm dia. bars in compression zone and 3-20 mm dia. bars in tension zone, each at an effective cover of 40 mm. The grade of concrete and steel are M20 and Fe415 respectively. The strain in compression steel will be [Take stress in compression steel as 345 MPa]Figure 2 shows a simply supported beam and the cross section at midspan. The beam supports a uniform service (unfactored) dead load consisting of its own weight plus 1.4 kips/ft and a uniform service (unfactored) live load of 1.5 kips/ft. The concrete strength is 3500 psi, and the yield strength of the reinforcement is 60,000 psi. The concrete is normal-weight concrete. Use load (Table 5.3.1) and strength reduction factors from AC1318-14. For the midspan section shown in Fig. P4-1b, compute Mn and show that it exceeds Mu. @ (b) 3 No. 9 bars WD = 1.4 kips/ft plus weight of beam 1.5 kips/ft WL H 12 in. 20 ft TT 21.5 in. 24 in. + Figure 2.
- 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 psiThe 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-aPrinciple of Reinforced/ Pre-stressed Concrete. Please provide clear written solution. Thank you! Calculate the magnitude of a uniformly distributed load (in addition to the beam’s) which will cause the beam section to begin to crack if it has a simple span of 6m. The beam is made of normal-weight concrete with fc’ = 28 MPa.
- 1.2m 10 cm O 7cm -7cm O This concrete beam has four A-35 steel rods of one centimeter diameter and a square cross section. It experiences a compressive axial load of 200kN. You must calculate the stresses developed in the two components in the figure.Find the ultimate moment of resistance for the rectangular section reinforced as shown below. material strengths: Concrete Reinforcement Width of section Reinforcement fcu= 30-MPa fy:= 450-MPa b:= 280 mm d:= 510 mm d':= 50-mm 2 A, 2410-mm A's:= 628-mm 2 b A', Hi AsA rectangular beam 250 mm wide, 500 mm deep is reinforced at the bottom with 4-20-mm-diameter bars and at the top with 2-16-mm bars. Concrete cover to bar centroid at the top is 80 mm and at the bottom is 70 mm. Use concrete strength f'c = 21 Pa and steel yield strength fy = 415 MPa for 20-mm bars and fy = 275 MPa for 16-mm bars Determine the limiting tensile steel ratio for a tension controlled condition in positive or negative bending with the given material strengths.
- a concrete floor slab 100mm thick is cast monotholic with concrete beams 2.0 m on centers. the beams have a span of 4.0m, web width of 259 mm and overall depth of 50 mm. the tensile reinforcement consists of 6-⌀20 mm bars in two rows with 25mm vertical clear spacing. use material strengths f'c=21MPa and fy=415MPa. calculate the ff considering a T-geometry: 1. effective flange width of an interior beam in mm 2. depth of uniform stress block at ultimate stage in mm to the nearest whole number 3. tensile steel strain compatible strain of 0.003A rectangular beam 250mm wide, 500 mm deep is reinforced at the bottom with 4-20-mm-diameter bars and at the top with 2-16-mm bars. Concrete cover to bar centroid at the top is 80mm and at the bottom is 70mm. Use concrete strength f’c=21 MPa and steel yield strength fy=415MPa for 20-mm bars and fy=275MPa for 16mm bars. Determine the limiting tensile stress ratio for a tension controlled condition in positive or negative bending with the given material strengths.38 A rectangular beam 250 mm wide, 500 mm deep is reinforced at the bottom with 4-20-mm-diameter bars and at the top with 2-16-mm bars. Concrete cover to bar centroid at the top is 80 mm and at the bottom is 70 mm. Use concrete strength f’c = 21 MPa and steel yield strength fy = 350 MPa for 20-mm bars and fy = 230 MPa for 16-mm bars. Determine the nominal moment capacity in kN∙m of the beam in positive bending. Write the answer in 2 decimal places only.