A rectangular concrete beam 250 mm wide and 600 mm deep is pre-stressed by means of 16 high tensile wires, each of 7 mm diameter, located at 200 mm from the bottom face of the beam at a given section. If the effective pre-stress in the wires is 700 MPa, what is the maximum sagging bending moment (in kNm) (correct to 1-decimal place) due to live load that this section of the beam can withstand without causing tensile stress at the bottom face of the beam? Neglect the effect of dead load of beam.

A rectangular concrete beam 250 mm wide and 600 mm deep is pre-stressed by means of 16 high tensile wires, each of 7 mm diameter, located at 200 mm from the bottom face of the beam at a given section. If the effective pre-stress in the wires is 700 MPa, what is the maximum sagging bending moment (in kNm) (correct to 1-decimal place) due to live load that this section of the beam can withstand without causing tensile stress at the bottom face of the beam? Neglect the effect of dead load of beam.

Steel Design (Activate Learning with these NEW titles from Engineering!)

6th Edition

ISBN:9781337094740

Author:Segui, William T.

Publisher:Segui, William T.

Chapter9: Composite Construction

Section: Chapter Questions

Problem 9.1.3P

See similar textbooks

Similar questions

ASAP NEED RIGHT COMPLETE SOLUTION !!! Determine the design compressive strength (kN)
Determine the prestressing steel area required for the precast concrete T-beam. Use the following data: Total moment = 250 kN-m Effective stress fse= 862 MPa Allowable concrete stress = f.=11 MPa Consider zero stress at the bottom of the beam I=3673x106 mm4 A=103125 mm² Eccentricity = 271.6 mm Centroid of steel is located at 100 mm from the bottom of the beam. Select one: a. 591.97 mm b. 789.29 mm 2. C. 443.98 mm 2. d. 986.61 mm
The maximum permissible load on a steel bar of 20 mm dia when the factor of safety is 1.8 and the ultimate stress is 495 MPa is (a) 863.9 kN (c) 8.639 KN (b) 86.39 kN (d) 0.86 kN
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
A prestressec concrete beam 300 mm wide and 600 mm deep is prestressed using 5 high tension bors f 12 mm o provide at 220 mm from the soffit of the beam. The effective stress in the steel is 800 N/ m Find the bending that niust be applied to the section to just auoid tension at the soffit of the beam.
The cross section of the simply supported pre-tensioned concrete beam has a width of 300mm and a total depth of 500mm. The beam has straight cables with initial prestress force of 964kN and a final prestress force of 624kN after five years. The concrete is uncracked, with a modulus of elasticity of 27 646 MPa. The cables are placed 400mm below the top most fiber of the beam. The superimposed dead load and live load are 12kN/m and 8kN/m respectively. Assume concrete weights 23.5kN/m^3. Spab of beam=9m. A. Determine the deflection immediately after the cable are cut. B. Determine the deflection after 5 years.
1) A rectangular reinforced concrete beam with dimensions b = 14 in, d = 25 in, and h = 28 in is reinforced with three No. 10 bars. Material strengths are fy = 60000 psi and fc' = 5000 psi. a. Find the cracking moment based on the uncracked transformed section b. Determine the maximum moment that can be carried without stressing the concrete beyond 0.45fc' or the steel beyond 0.6fy. Hint: Assume maximum compressive stress in the concrete to be 0.45fc' and check whether the maximum steel stress reaches 0.6fy. This way you can check which one is reached first C. Find the nominal moment capacity of the beam
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
The T-beam has the following properties: flange thickness = 125 mm flange width = 1000 mm web width = 500 mm web height = 350 mm f'c = 28 Mpa a) Calculate the stresses in concrete at uncracked stage under 200 kN-m. b) Calculate the cracking moment. c) Determine the balanced steel area and balanced ultimate moment. The steel is placed 80 mm from its cg up to extreme fiber with yield strength of 414 MPa.
S Maximum strain in extreme fibre of concrete and in tension steel of Fe 415 grade (E = 2 x 105 N/mm²) in a balance section in limit state of flexure are respectively (a) 0.0035 and 0.0031 (b) 0.0035 and 0.0038 (c) 0.002 and 0.0042 (d) 0.002 and 0.0038
The end block of a post-tensioned beam is 100 mm x 150 mm. A prestressing cable consisting of 7 wires of 6 mm dia strand and stressed to 800 MPa has to be anchored at the center of the block. The anchorage plate is 75 mm x 75 mm. If the concrete mix is M45 and the permissible bending stress in M. S. steel plate is 165 MPa, determine the thickness of the anchorage plate.
The T-beam has the following properties: flange thickness = 110 mm flange width = 700 mm web width = 400 mm web height = 250 mm f'c = 28 Mpa a) Calculate the stresses in concrete at uncracked stage under 100 kN-m. b) Calculate the cracking moment. c) Determine the balanced steel area and balanced ultimate moment. The steel is placed 80 mm from its cg up to extreme fiber with yield strength of 414 MPa. NOTE: Please answer the question correctly, if you are not sure about the answer(s) please skip the question. Please box the final answer(s) Thank you