A 250 mm x 500 mm prestressedbeam has a simple span of 6m. Thebeam uses stress relieved tendonswith specified strength fpy = 1350MPa and an effective an effectivestress in prestressed reinforcementafter allowable for prestress losses fse= 760 MPa. The prestressed beam is%3Dnot to be grouted (unbonded) afterthe application of the prestress. If thearea of prestress reinforcement intension zone is Aps = 1000 mm2applied 70 mm above the bottom ofthe beam and f'c = 35 MPa,determine the safe ultimate momentcapacity of the beam. (kN-m)

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Answered: n has a simple sp n uses stress reli

Engineering

Civil Engineering

n has a simple sp n uses stress reli

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Types and properties of steel

Steel is an alloy of iron. It is formed by heating iron and combining carbon (0.1-1.7%) with it and minor amounts of other elements such sulfur, chromium, manganese, nickel, etc. Thousands of steel grades have been published, registered, or regulated around the world, each with its chemical composition, and special numbering systems have been devised in various countries to classify the vast number of alloys.

Question

A 250 mm x 500 mm prestressed
beam has a simple span of 6m. The
beam uses stress relieved tendons
with specified strength fpy = 1350
MPa and an effective an effective
stress in prestressed reinforcement
after allowable for prestress losses fse
= 760 MPa. The prestressed beam is
%3D
not to be grouted (unbonded) after
the application of the prestress. If the
area of prestress reinforcement in
tension zone is Aps = 1000 mm2
applied 70 mm above the bottom of
the beam and f'c = 35 MPa,
determine the safe ultimate moment
capacity of the beam. (kN-m)

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