PROBLEM: A simply supported beam has a width of 300 mm and an effective depth of 330 mm. It is reinforced at the bottom with a steel reinforcement area of 2464 mm?. Assuming steel covering to the centroid of the reinforcement is 70 mm. fc' = 34 MPa, and fy = 415 MPa. DETERMINE: • Ultimate Moment (Singly Reinforced) • Ultimate Moment (Doubly Reinforced) if the beam is reinforced with steel area of 1232 mm? (Compression Bars) at the top in addition to the existing steel area of 2464 mm2 (Tension Bars) at the bottom.

PROBLEM: A simply supported beam has a width of 300 mm and an effective depth of 330 mm. It is reinforced at the bottom with a steel reinforcement area of 2464 mm?. Assuming steel covering to the centroid of the reinforcement is 70 mm. fc' = 34 MPa, and fy = 415 MPa. DETERMINE: • Ultimate Moment (Singly Reinforced) • Ultimate Moment (Doubly Reinforced) if the beam is reinforced with steel area of 1232 mm? (Compression Bars) at the top in addition to the existing steel area of 2464 mm2 (Tension Bars) at the bottom.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

The cross section of the beam in Figure reinforced in negative by 4#25 and transverse stirrups No.10 @ 150 mm along the beam. The longitudinal reinforcement bars are epoxy coated. Determine the required development length for the bars. If, f.'= 20 MPa and f,=400 MPa. 75 mm 4 # 25 550 mm + 450 mm -
Question 22 A concrete floor slab 100 mm thick is cast monolithic with concrete beams 2.0 m on centers. The beams have a span of 4 m and have a web width of 250 mm, an effective depth of 400 mm and overall depth of 500 mm. The tensile reinforcement consists of 6-ϕ32 mm bars in two rows. Use material strengths f’c = 21 MPa and fy = 415 MPa. Calculate the ultimate bending moment strength of the T-beam in kN·m.
QUIZ A tensile-reinforced d=500mm to the center of the bars, which are placed all in one row. If fy=42QMPA and fek=35MPA, find the nominal flexural strength Mn equivalent stress block. beam has b=300mm and ck using rectangular (a) Two D-25 bars (b) Two D-32 bars (c) Three D-32 bars 3. 2022-03-31
6- For a simply supported beam with b=300 mm and d=500 mm, if f = 63MPA, f, = 280MPA and the net tensile strain is greater than 0.005, then the maximum steel ratio equals. . (a) 0.0406 (b) 0.0310 (c) 0.0287 (d) 0.0180 (e) None
A tensile-reinforced beam has b= 350 mm and d= 550 mm to the center of bars which are placed all in one row. If fy =420 Mpa and f'c = 35Mpa, find the nominal flexural strength Mn for: (a) As two No. 25 bars, = (b) As two No.32 bars, (c) As = three No. 32 bars.
A beam, which is rectangular, has a base of 250 mm, and d = 575 mm. The beam is singly reinforced, where the recorded strain in the steel is 0.005, and the strain in the concrete is 0.003. fc' = 20.7 MPa, fy = 414.6 MPa. Note: As is not Given b) Determine the value of "As"
Pith-obl A reinforced concrete beam has a width of 300mm and an effective depth of 600mm. Compressive reinforcement (if required will be placed at d'=60mm. f'c=27.5 MPa and fy=415 MPa. Use NSCP 2015. The beam is to support a factored bending moment of 670 kN-m, a) Determine the area of steel required as tension reinforcement if the minimum strain in the extreme tension steel is permitted to be 0.004 b) Determine the area of steel required as tension reinforcement if the minimum strain in the extreme tension steel is limited to 0.005 c) Determine the number of 28mm bars required as tension reinforcement if the reduction factor, -0.90
Seatwork The beam shown is prestressed by using a bonded (stress relieved tendons) with a specified tensile strength of prestressing tendons strength fpu=1350 MPa, fc'=35 MPa. The area of prestressed reinforcement in tension zone Aps=1000 mm?. The specific yield strength of prestressing tendons sd, foy=1160 MPa. а. What is the value of the stress in prestressed reinforcement at nominal strength (Aps) b. What is the value of the depth of the compression block. С. What is the ultimate moment capacity of the prestressed beam. 0.85fc' 430 NA |(d-a/2) · A=1000 T=Ap.Sps 250
Determine the largest weight W that can be supported by the two wires AB and AC. The allowable working stresses are 180 MPa for AC and 120 MPa for AB. The cross-sectional area of AB is 500 mm2 and that of AC is 300 mm2. Show the solution. Correct answer is 60.23kN
Design of Beam in Flexure Use Working Stress Method Fc=10 MPa Fs=120 MPa n=12 Bar Diameter = 20 mm Take b=d/2
A beam carrying an allowable actual moment of -38 KN- m is reinforced as shown. If the the concrete is normal weight and f'c = 25MPa and fy = 420MPa. Determine the following: a. The cracking moment of the beam. b. The transformed moment of Inertia. c. The actual tension steel stress. d. Check the stress if it is correct by force checks. mm www.009 4-020 О 140 mm 300 mm 170 mm * 170 mm: ww.08 ✓ 60 mm
A concrete floor slab 100 mm thick is cast monolithic with concrete beams 2.0 m on centers. The beams have a span of 4 m and have a web width of 250 mm, an effective depth of 400 mm and overall depth of 500 mm. The tensile reinforcement consists of 6-ϕ32 mm bars in two rows. Use material strengths f’c = 21 MPa and fy = 415 MPa. Calculate the ultimate bending moment strength of the T-beam in kN·m. A. 640 B. 701 C. 778 D. 711