A prestressed concrete beam 221mm x 703mm has the following service loadings PDL-40 kN PLL=42 kN wDL=9 kN/m wLL=13 kN/m Loss of prestress at service loads is 18 % Throughout the span, the tendons are located 70 mm below the N.A. If the allowable compressive stress is 15.75 MPa and the allowable tensile stress is 2.96 MPa, and considering the point of maximum moment, calculate the required Prestressing force in kN. POL, PL 5m WDL, WLL WLL 16m B

A prestressed concrete beam 221mm x 703mm has the following service loadings PDL-40 kN PLL=42 kN wDL=9 kN/m wLL=13 kN/m Loss of prestress at service loads is 18 % Throughout the span, the tendons are located 70 mm below the N.A. If the allowable compressive stress is 15.75 MPa and the allowable tensile stress is 2.96 MPa, and considering the point of maximum moment, calculate the required Prestressing force in kN. POL, PL 5m WDL, WLL WLL 16m B

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter12: Composite Materials

Section: Chapter Questions

Problem 12.7P: Estimate the transverse tensile strength of the concrete in Problem 12.6.

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Question

I need correct answer

A prestressed concrete beam 221mm x 703mm has the following service
loadings
PDL=40 kN
PLL=42 kN
wDL=9 kN/m
wLL=13 kN/m
Loss of prestress at service loads is 18 %
Throughout the span, the tendons are located 70 mm below the N.A..
If the allowable compressive stress is 15.75 MPa and the allowable tensile
stress is 2.96 MPa, and considering the point of maximum moment,
calculate the required Prestressing force in kN.
POL PL
5m
WDL, WLL
16m
A
В

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