Question

A.) A highway is made of concrete slabs that are 17.1 m long at 20.0°C. Expansion coefficient of concrete is α = 12.0 × 10⁻⁶ K⁻¹.

f the temperature range at the location of the highway is from −20.0°C to +41.9°C, what size expansion gap should be left (at 20.0°C) to prevent buckling of the highway?

*Answer in mm

B.)

The George Washington Bridge crosses the Hudson River between New York and New Jersey. The span of the steel bridge is about 1.60 km. What might be the difference between the maximum span and minimum span over the course of a year, if the temperature can vary from a low of −15.0°F in winter to a high of 103°F in summer? Expansion coefficient of steel is α = 12.0 × 10⁻⁶ K⁻¹.

C.) In which equation did temperature have a greater impact

Answer 1

C) Actually it all depends on Temperature difference and expansion coefficient. In previous case it around 12.5mm in comparison with 17.1m while in second case it is only 1.288m in comparison with 1.6Km.

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