A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Uncoupling Modulus of Elasticity and Strength
The concrete industry has made considerable progress in increasing the compressive strength of concrete. At the time of the first workshop on high-strength concrete, held in Chicago IL, in 1979, the lower limit for high-strength concrete was defined as 6000 psi (42 MPa). Less than 30 years later, the maximum concrete cylinder strength f'c specified for Chicago's Trump Tower was 16,000 psi (110 MPa). While compressive strength is important for minimizing the sizes of compression elements, designers of tall buildings may also specify a high modulus of elasticity (MOE) to limit lateral deformations and ensure occupant comfort. While MOE can be raised by increasing the compressive strength, the relationship is weak-many of the empirical relationships used to estimate MOE are functions of the square root of the compressive strength. By optimizing mixture proportions and constituents, however, it is possible to make high-strength concrete with an MOE approaching 55 GPa (8,000,000 psi).
Uncoupling Modulus of Elasticity and Strength
The concrete industry has made considerable progress in increasing the compressive strength of concrete. At the time of the first workshop on high-strength concrete, held in Chicago IL, in 1979, the lower limit for high-strength concrete was defined as 6000 psi (42 MPa). Less than 30 years later, the maximum concrete cylinder strength f'c specified for Chicago's Trump Tower was 16,000 psi (110 MPa). While compressive strength is important for minimizing the sizes of compression elements, designers of tall buildings may also specify a high modulus of elasticity (MOE) to limit lateral deformations and ensure occupant comfort. While MOE can be raised by increasing the compressive strength, the relationship is weak-many of the empirical relationships used to estimate MOE are functions of the square root of the compressive strength. By optimizing mixture proportions and constituents, however, it is possible to make high-strength concrete with an MOE approaching 55 GPa (8,000,000 psi).
Uncoupling Modulus of Elasticity and Strength
Surendra P Shah (author) / Maria S Konsta-Gdoutos
2017
Article (Journal)
English
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