(a) Suppose we have a site where there is 30 m of sandstone (density of 2600 kg/m') overlying basalt with a density of 3000 kg/m'. Calculate the total vertical compressive stress induced at 50 m depth from these rock units. (b) Suppose we take a core sample of a granite with a radius of 1.25 cm and a length of 5 cm and we load it under a uniaxial compressive force of 30 kN. At that force we find the core is now 4.995 cm long. What is the modulus of elasticity for this granite?

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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(a) Suppose we have a site where there is 30 m of sandstone (density of 2600 kg/m³) overlying basalt with a
density of 3000 kg/m³. Calculate the total vertical compressive stress induced at 50 m depth from these
rock units.
(b) Suppose we take a core sample of a granite with a radius of 1.25 cm and a length of 5 cm and we load it
under a uniaxial compressive force of 30 kN. At that force we find the core is now 4.995 cm long.
What is the modulus of elasticity for this granite?
Transcribed Image Text:(a) Suppose we have a site where there is 30 m of sandstone (density of 2600 kg/m³) overlying basalt with a density of 3000 kg/m³. Calculate the total vertical compressive stress induced at 50 m depth from these rock units. (b) Suppose we take a core sample of a granite with a radius of 1.25 cm and a length of 5 cm and we load it under a uniaxial compressive force of 30 kN. At that force we find the core is now 4.995 cm long. What is the modulus of elasticity for this granite?
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