A direct method of viscoelastic analysis for ageing concrete
| Autor: | B R Gamble, I J Jordaan |
|---|---|
| Rok vydání: | 1974 |
| Předmět: |
Materials science
Deformation (mechanics) Direct method General Engineering Young's modulus Building and Construction Mechanics Integral equation Viscoelasticity Stress (mechanics) symbols.namesake Creep Mechanics of Materials symbols General Materials Science Composite material Elastic modulus Civil and Structural Engineering |
| Zdroj: | Matériaux et Constructions. 7:37-43 |
| ISSN: | 1871-6873 0025-5432 |
| DOI: | 10.1007/bf02482678 |
| Popis: | The paper outlines a direct method of linear creep analysis of ageing concrete structures based on the classical elastic-viscoelastic analogy. The method develops from a constitutive relationship which accounts for reversible and irreversible strain components. The reversible strains include the effects of ageing, and irreversibility due to both aging and applied stress is considered. The relationship between the components allows the time variables to be replaced by corresponding functions of the irreversible compliance: the integral equation representing the creep solution of many structure problems is then invariable in form and the elastic-viscoelastic analogy can be invoked. The effects of an immediate elastic modulus that varies with time may be analysed. The method compares favourably with other analyses requiring step-by-step computations in time, and with other available direct methods which lead to considerable errors for variable stress regimes or give only steady-state solutions. |
| Databáze: | OpenAIRE |
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