Given are the following: Unit weight of concrete = 24 kN/m³ f'c = 35 Mpa fse = 820 MPa fpu = 1350 MPa = 1200 mm? Aps fpy = 1050 MPa Beam is a simple span and have a length of 30m. Use bonded tendons as prestressed reinforcement. A. Determine the depth of the compression block (mm) B. Determine the nominal moment strength (kN-m)

Given are the following: Unit weight of concrete = 24 kN/m³ f'c = 35 Mpa fse = 820 MPa fpu = 1350 MPa = 1200 mm? Aps fpy = 1050 MPa Beam is a simple span and have a length of 30m. Use bonded tendons as prestressed reinforcement. A. Determine the depth of the compression block (mm) B. Determine the nominal moment strength (kN-m)

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Three high-strength concrete poles, with an effective cross- sectional area of 40, 000m * m ^ 2 and a length of 2 m, support a stiff steel plate. The center post is 1 mm shorter than the others before the load P is applied. If the concrete's allowed compressive stress is 20 MPa, calculate the maximum load that can be carried. E = 30GPa for concrete
Given are the following: 300 Unit weight of concrete = 24 kN/m3 f'c = 28 Mpa fse = 850 MPa fpu = 1350 MPa Aps = 750 mm? fpy = 1280 MPa Beam is a simple span and have a length of 24m. Use unbonded tendons as prestressed reinforcement. A. Determine the value of fps (MPa) B. Determine the nominal moment strength (kN-m) 750 850
4. Analyze the beam shown below given fe' = 3500 psi and fy= 60,000 psi: (a) Use d = 22 in. (effective depth of tension reinforcement), assuming the compression steel yields at the ultimate stage, calculate the reinforcing ratio of flexural reinforcement. (b) Is the beam underreinforced or overreinforced? Show reasons to your answer. (c) Calculate the nominal flexural strength of the section: M,? (d) Determine the design capacity of the section: øMn.
A beam having a width of 500 mm and a total depth of 800mm is reinforced with 6-32mm dia bars. Compressive strength of concrete is 28 MPa and yield strength of reinforcing bars is 420MPA. 640 mm 800 mm 6 #32 C 80 mm 80 mm Determine the following: 1. depth of the compression block 2. strain in the tension reinforcement 3. moment reduction factor 4. nominal moment capacity 5. ultimate moment capacity 6. actual steel ratio 7. minimum steel ratio 8. maximum steel ratio 9. Tension force 10. Compression force
A rectangular beam has a width of 285 mm and an effective depth of 520mm. It is reinforced with 4 – 36 mm ø bars having fy = 430 MPa. If he compressivestrength of the concrete is 28MPa, find the following a. Location of the neutral axis from the top of the beam.b. Stress of the steel.c. Ultimate capacity of the beam?
Determine the required tension steel area of the T beam with given properties below. Width of flange bf = 500 mm Width of web bw = 340 mm Thickness of flange tf = 140 mm Effective depth d = 350mm Effective concretee covering d' = 75mm Compressive strength of concrete fc' = 34.5 MPa Yield stress of steel bar fy = 375 MPa Mu = 415 kN-m As = _________ mm2
Design the slab reinforcement if the maximum positive moment is Mup=wul2/11 . and the maximum negative moment is Mun=wul2/10. Include the design for S&T bar. Given: length = 10.9 m span = 3m Wu= 8.572 kPa Slab thickness = 150 mm f'c = 28 MPa fy= 414 MPa main bar = 10 mm s&t bar = 8mm
A reinforced concrete beam has a width of 300 mm and an effective depth of 618 mm. Compressive reinforcement will be placed at d' = 60 mm, f'c = 28 MPa and fy = 415 MPa. Use Ø = 0.9 for flexure and load combination of U= 1.2DL + 1.6LL. Reference: NSCP 2015. a. Calculate the steel ratio for a balanced section, phal- b. Calculate the maximum steel ratio for a tension-controlled section, pmax. d. c. If the beam is to support a bending moment of 240 kN-m from dead load and 195 kN-m from live load, determine the required design flexural strength of the section. If the beam is to support a bending moment of 240 kN-m from dead load and 195 kN-m from live load, determine the number of 28 mmø bars required as tension reinforcement.
DO NOT ROUND OFF IN BETWEEN SOLUTIONS.
Use USD method.
Problem 2: A reinforced concrete beam has a width of 300 mm and a total depth of 550 mm. Effective cover to centroid of tension bars is 60mm. Compressive reinforcement (if required) will be placed at d’ = 60mm. f’c = 21 MPa and fy = 415 MPa. The Follow 2010/2015 NSCP provision and use ? = 0.90 for flexure. a.) Determine the required area of steel reinforcement, As, if the beam carries a factored moment of 79 kN-m. b.) Determine the required area of steel reinforcement, As, if the beam carries a factored moment of 193 kN-m. c.) Determine the required area of steel reinforcement, As, if the beam carries a factored moment of 402 kN-m.