4. Given the following data of prestressed rectangular beam Beam dimension; b x h = 300 mm x 600 mm Loads; Super imposed deadload = 5 kN/m, Live load = 15 kN/m Unit weight of concrete = 23 kN/m³ Simple supported beam with a span of 12 m Initial Presstressed = 1750 kN Eccentricity 220 mm Presstress loss at service load = 15% a) Calculate the stress at bottom fiber at end span due to initial presttressing only b) Calculate the stress at the top fiber of the beam at midspan due to the service loads and prestressing force(loss of presstress is 15%) c) Calculate the maximum additional uniform load that the beam can be subjected without producing tensile stress in conrete
4. Given the following data of prestressed rectangular beam Beam dimension; b x h = 300 mm x 600 mm Loads; Super imposed deadload = 5 kN/m, Live load = 15 kN/m Unit weight of concrete = 23 kN/m³ Simple supported beam with a span of 12 m Initial Presstressed = 1750 kN Eccentricity 220 mm Presstress loss at service load = 15% a) Calculate the stress at bottom fiber at end span due to initial presttressing only b) Calculate the stress at the top fiber of the beam at midspan due to the service loads and prestressing force(loss of presstress is 15%) c) Calculate the maximum additional uniform load that the beam can be subjected without producing tensile stress in conrete
Chapter2: Loads On Structures
Section: Chapter Questions
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Please answer asap.using 4 decimal used nscp 2015
Transcribed Image Text:4. Given the following data of prestressed rectangular beam
Beam dimension; b x h = 300 mm x 600 mm
Loads; Super imposed deadload = 5 kN/m, Live load 15 kN/m
Unit weight of concrete = 23 kN/m³
Simple supported beam with a span of 12 m
Initial Presstressed = 1750 kN
Eccentricity 220 mm
Presstress loss at service load = 15%
a) Calculate the stress at bottom fiber at end span due to initial presttressing only
b) Calculate the stress at the top fiber of the beam at midspan due to the service loads and prestressing force(loss of presstress is 15%)
c) Calculate the maximum additional uniform load that the beam can be subjected without producing tensile stress in conrete
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Step 1: Introduce the problem statement
VIEWStep 2: Compute total service load on the beam
VIEWStep 3: Determine the stress at bottom fiber at end span due to initial prestressing only
VIEWStep 4: Determine the bending stress due to service loads
VIEWStep 5: Determine the stress at top fiber at end span due to prestress and service load
VIEWStep 6: Determine the stress at bottom fiber at end span due to prestress and service load
VIEWStep 7: Compute additional load that beam can carry without inducing tension
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