3rd: A simply supported 12-m span beam, 300-mm wide by 550-mm deep, is pre- stressed by straight tendons with Aps = 774 mm² located 70 mm from the bottom at an initial prestress of 1.10 GPa. What maximum service uniform live load can the beam support in addition to its own weight if allowable tensile stress in concrete 0.5 x

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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3rd: A simply supported 12-m span beam,
300-mm wide by 550-mm deep, is pre-
stressed by straight tendons with Aps = 774
mm² located 70 mm from the bottom at an
initial prestress of 1.10 GPa. What maximum
service uniform live load can the beam
support in addition to its own weight if
allowable tensile stress in concrete 0.5 x
square root of f'c is permitted. after 17% loss
Write your answer in 2 decimal places only.
Use fc = 30 MPa unit weight of concrete 24
kN/cu.m. Sign convention is (+) tension, (-)
compression. Indicate the sign in your final
answer.
Transcribed Image Text:3rd: A simply supported 12-m span beam, 300-mm wide by 550-mm deep, is pre- stressed by straight tendons with Aps = 774 mm² located 70 mm from the bottom at an initial prestress of 1.10 GPa. What maximum service uniform live load can the beam support in addition to its own weight if allowable tensile stress in concrete 0.5 x square root of f'c is permitted. after 17% loss Write your answer in 2 decimal places only. Use fc = 30 MPa unit weight of concrete 24 kN/cu.m. Sign convention is (+) tension, (-) compression. Indicate the sign in your final answer.
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