A 1.8 m high square concrete column with b = 220 mm (Ec ac = 9.9 × 10-6/° C) is reinforced with six 30 mm steel bars (E, 25 GPa and = 200 GPa and as 11.7 x 10-6/°C). The tensile strength of the concrete is 2 MPa. Cracks will begin to form in the concrete when the axial stress in the concrete reaches this level. ΔΤ X Determine the change in temperature AT necessary to cause cracks to develop O in the concrete of this column. Report your answer in C with one decimal place of accuracy. Indicate an increase in temperature as positive and a decrease as negative. = O s = = What is the axial stress in the reinforcing steel when these cracks develop? Report your answer in units of MPa with two decimal places of accuracy. Tension is positive and compression is negative. 1.8 m Check = MPa
A 1.8 m high square concrete column with b = 220 mm (Ec ac = 9.9 × 10-6/° C) is reinforced with six 30 mm steel bars (E, 25 GPa and = 200 GPa and as 11.7 x 10-6/°C). The tensile strength of the concrete is 2 MPa. Cracks will begin to form in the concrete when the axial stress in the concrete reaches this level. ΔΤ X Determine the change in temperature AT necessary to cause cracks to develop O in the concrete of this column. Report your answer in C with one decimal place of accuracy. Indicate an increase in temperature as positive and a decrease as negative. = O s = = What is the axial stress in the reinforcing steel when these cracks develop? Report your answer in units of MPa with two decimal places of accuracy. Tension is positive and compression is negative. 1.8 m Check = MPa
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A 1.8 m high square concrete column with b = 220 mm (Ec = 25 GPa and
9.9 × 10-6/°C) is reinforced with six 30 mm steel bars (E = 200 GPa
11.7 × 10-6/°C). The tensile strength of the concrete is 2 MPa.
Cracks will begin to form in the concrete when the axial stress in the concrete
reaches this level.
ac
and as
=
O s
=
Determine the change in temperature AT necessary to cause cracks to develop
in the concrete of this column. Report your answer in C with one decimal place
of accuracy. Indicate an increase in temperature as positive and a decrease as
negative.
AT: =
What is the axial stress in the reinforcing steel when these cracks develop?
Report your answer in units of MPa with two decimal places of accuracy. Tension
is positive and compression is negative.
=
1.8 m
Check
MPa
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