Materials Science And Engineering Properties
1st Edition
ISBN: 9781111988609
Author: Charles Gilmore
Publisher: Cengage Learning
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Chapter 10, Problem 19CQ
To determine
The method in which the metal is deposited on electrode in an electrochemical cell.
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A double-T simply supported concrete beam its cross section is shown in
Figure, is prestressed with 2 tendons each 400 mm². Determine the allowable
service load.
Use span 12 m, fse = 1300 MPa, fc = 40 MPa, y = 25 kN/m³.
=
1200 mm
>09<
*100*
As = 400
+100+
As = 400
400
1400+
A prestressed simply supported 15 m span beam with rectangular box section is post-tensioned by
straight high tensile steel wires as shown in Figure. The prestressing wires are placed at the center
line of the flanges and initially stressed to 850 N/mm². The beam is required to carry a uniformly
distributed superimposed load of 4.5 kN/m in addition to its weight. If the concrete stresses are not
to exceed 17 MPa in compression and 1 MPa in tension at service stage, calculate the range of the
total prestressing wires area required. Ignore prestressing force losses in your answer. (Ye
kN/m³).
= 24
2As
400
As
80
80;
750
A simply supported rectangular prestressed concrete beam, of span 13 m and its cross section as
shown in figure, is carrying a live load equals to 30 kN/m in addition to its weight, compute the
following stresses and compare it with ACI allowable stress:
a) Bottom fiber stress at support in initial stage.
b) Top fiber stress at mid span in final stage.
Use y = 24 kN/m³, As = 600 mm², initial stress of the prestressed steel = 1200 MPa, total losses
is 20%, fci = 22 MPa, and fo' = 28 MPa
800 mm
3 As
400 mm
As
340 mm
340 mm
Chapter 10 Solutions
Materials Science And Engineering Properties
Ch. 10 - Prob. 1CQCh. 10 - Prob. 2CQCh. 10 - Prob. 3CQCh. 10 - Prob. 4CQCh. 10 - Prob. 5CQCh. 10 - Prob. 6CQCh. 10 - Prob. 7CQCh. 10 - Prob. 8CQCh. 10 - Prob. 9CQCh. 10 - Prob. 10CQ
Ch. 10 - Prob. 11CQCh. 10 - Prob. 12CQCh. 10 - Prob. 13CQCh. 10 - Prob. 14CQCh. 10 - Prob. 15CQCh. 10 - Prob. 16CQCh. 10 - Prob. 17CQCh. 10 - Prob. 18CQCh. 10 - Prob. 19CQCh. 10 - Prob. 20CQCh. 10 - Prob. 1ETSQCh. 10 - Prob. 2ETSQCh. 10 - Prob. 3ETSQCh. 10 - Prob. 4ETSQCh. 10 - Prob. 5ETSQCh. 10 - Prob. 10.1PCh. 10 - Prob. 10.2PCh. 10 - Prob. 10.3PCh. 10 - Prob. 10.4PCh. 10 - Prob. 10.5PCh. 10 - Prob. 10.6PCh. 10 - Prob. 10.7PCh. 10 - Prob. 10.8PCh. 10 - Prob. 10.9PCh. 10 - Prob. 10.10PCh. 10 - Prob. 10.11PCh. 10 - Prob. 10.12P
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