Example 18.9: A two hinged parabolic arch has a span 30 m and a rise of 7.5 m. The M.I. of arch section is proportional to sec 0, where 0 is the slope of the arch axis at any pont with the horizontal. Calculate the horizontal thrust caused in the arch due to rise of temperature 25°F. The value of E = 2 x 10 kN/m2 and hte co-efficient of expansion 10 m. 6 x 10-6 per degree F The M.I. at crown is 1.25 x

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Example 18.9: A two hinged parabolic arch has a span 30 m and a rise of 7.5 m. The M.I. of arch
section is proportional to sec 0, where 0 is the slope of the arch axis at any pont with the horizontal.
Calculate the horizontal thrust caused in the arch due to rise of temperature 25°F. The value of E = 2
x 10$ kN/m2 and hte co-efficient of expansion
10 m.
6 x 10-6
per degree F. The M.I. at crown is 1.25 x
Transcribed Image Text:Example 18.9: A two hinged parabolic arch has a span 30 m and a rise of 7.5 m. The M.I. of arch section is proportional to sec 0, where 0 is the slope of the arch axis at any pont with the horizontal. Calculate the horizontal thrust caused in the arch due to rise of temperature 25°F. The value of E = 2 x 10$ kN/m2 and hte co-efficient of expansion 10 m. 6 x 10-6 per degree F. The M.I. at crown is 1.25 x
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