Assignment(1):- QI-For the rectangular reinforced concrete section shown in fig(1) .Answer the following:- Calculate the moment capacity of the section, so that the allowable stress in steel and concrete not exceed to 0.5fy and 0.45fe respectively? (neglect the steel in compression)? Use d=420 mm f=25Mpa, fy=420Mpa 3aYear- 2021 3#16 Fig.(1) #10 500mm 3#25 280mm
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- 4. A reinforced concrete T-beam has the following properties: Flange width, bf = 1,350 mm Width of web, bw = 300 mm Gross depth, h = 500 mm Effective depth, d = 420 mm Concrete strength, f’c = 21 MPa Steel strength, fy = 415 MPa a. If the beam is reinforced with 3-20-mm-diameter bars at the bottom (in single layer), determine the resulting depth of rectangular stress block at ultimate stage. = ____ mm (2 decimal places) b. What is the condition of failure? = ____ (Balanced, Tension controlled, Compression controlled, Transition) c. Calculate the design moment strength of a typical interior beam. = ____ kN⋅m (whole number)Topic: Singly Reinforced Concrete A simply supported concrete beam 6m long is reinforced with four-28mm diam. tension barss. The beam has a width of 300mm and overall depth of 400m. The steel covering to the centroid of the reinforcements is 70mm, fc’= 30 MPa and fy= 418 MPa. A. Draw the stress diagram. B. Compute for the Ultimate capacity of the beam Note: Don’t conclude compression bars.A reinforced concrete T-beam has the following properties: Flange width, bf = 1,350 mm Width of web, bw = 300 mm Gross depth, h = 500 mm Effective depth, d = 420 mm Concrete strength, f’c = 21 MPa Steel strength, fy = 415 MPa 10. If the beam is reinforced with 3-20-mm-diameter bars at the bottom (in single layer), determine the resulting depth of rectangular stress block at ultimate stage. = mm (2 decimal places) 11. What is the condition of failure? = (Balanced, Tension controlled, Compression controlled, Transition) 12. Calculate the design moment strength of a typical interior beam. = kN⋅m (whole number)
- The steel framework is used to support the reinforced concrete cinder, as shown in Figure 2. (Hint: see table ). The thickness of the slab is 4 inches, and the slab carries a uniform live loading of 300 lb/ft2. Sketch loading.The column is constructed from high-strength concrete and eight A992 steel reinforcing rods. The column is subjected to an axial force of P=210 kip. Each rod has a diameter of 1 in.in. For A992 steel, Est=29.0(103)ksi, and for high-strength concrete, Ec=4.20(103)ksi. Determine the average normal stress in the concrete and in each rod. (Please type answer no write by hend)the rectangular beam having a dimension of b= 320mm, h=460mm with 4pcs-28mm diameter reinforcing bars, determine the following a) cracking moment if fr =3.4MPa, b) stressed if moment (M)=42kN-m and n=9
- Problem 4. A reinforced concrete beam having a simple span of 8m is reinforced for tension with 25mm dia bars (As = 1963 mm2). The beam has a width of 350mm and an effective depth of 690 mm. Use f'c = 20.7 MPa, fy = 414 MPa. a. Determine the location of the neutral axis measured from the top outermost compression fiber of the section. Ans.: Blank 1 mm b. Determine the ultimate moment capacity of the beam. Ans.: Blank 1 kN.m. c. Determine the safe uniform live load (in kN/m) that the beam could carry. Assuming weight of concrete is 24 kN/cu.m. Ans.: Blank 1 kN/mHelp me how to design the REINFORCED CONCRETE BEAMS WITH IRREGULAR CROSS SECTION as shown infigure 1 using the following parameters:F’c = 3,500 Psi Fy=Grade 40 Stirrups = Φ10mmMu = 200 Kn-M All Concrete cover = 30mm Es=200,000 Mpa Find the following: AC area of compression concrete stress block in mm. Assume z = 0.85dEff a height of compression concrete stress block in mm. c distance from the neutral axis to outermost compression fiber in mm. z actual moment arm for Mu=ØTz in mm. As actual area of tension steel in sq.mm. N quantity of Ø20mm steel rebars ЄS Actual Strain of steel ЄY Yield Strain of steel Check if the beam is singly reinforced concrete in the designed then concludeCheck: ЄY < = > ЄS Draw the Working Drawings of the x-section.STRENGTH OF MATERIALS. Please show the complete solutions. Rate will be given. Answer in 3 decimal places! The plate shown is fastened to the fixed member by eight 16-mm diameter rivets. Compute the polar moment of inertia, J. Determine the value of the loads P so that the maximum shearing stress in any rivet does not exceed 80 MPa. If P = 8200 N, what is the maximum and minimum shearing stress developed in the rivet.
- A reinforced concrete beam has a width of 300 mm and a total depth of 500 mm. It is reinforced with 6-28 mm Øbars in two layers such that the effective depth is 419 mm. fc’ = 27.6 MPa, fy = 414.7 MPa, Es = 200 GPa. a)Compute the depth of the compression block b)Compute the stress of steel c)Compute the ultimate moment capacity of the beamA reinforced concrete T-beam has the following properties: Flange width, bf = 1350 mm Width of web, bw = 300 mm Gross depth, h = 500 mm Effective depth, d = 420 mm Concrete strength, f'c = 21 MPa Steel strength, fy = 415 MPa If the beam is reinforced with 3-20-mm-diameter bars at the bottom (in single layer), determine the resulting depth of rectangular stress block at ultimate stage (mm, 2 decimal places). What is the condition of failure? (Balanced, Tension controlled, Compression controlled, Transition). Calculate the design moment strength of a typical interior beam (kN-m, whole number).A reinforced concrete beam, b by h with tensile reinforcement of 6-25mm diameter bars is simply supported on a clear span of 12m. Given: fc = 12 MPa fs = 140 Mpa wc = 24 kN/m3 n = 12 b = 331 mm h = 602 mm d = 582 mm determine the ff. 1. Compute the moment capacity of concrete in kN-m. 2. Compute the moment capacity of steel in kN-m. 3. Aside from the uniformly distributed self-weight of the reinforced concrete, what will be the maximum two equal concentrated loads it can carry that will be located at its third points in kN?