若材令コンクリートの熱及び乾燥による応力解析法

抄録

The purpose of this paper is to suggest an analytical method of thermal and shrinkage stresses in concrete at early age. Two phenomena, hydration reaction and desiccation occur in concrete at early age. The desiccation changes physical constants on the differential equation of heat conduction which obtains thermal stresses and the differential equation of diffusion which obtains shrinkage stresses. So thermal stresses and shrinkage stresses should be analyzed together. This paper proposes an analytical method of thermal stresses and shrinkage stresses which arise together in concrete at early age, basing on some assumptions as follows. (1) Concrete regards as homogeneous and isotropic. (2) Stresses and strains by creep is neglected. (3) The flow of heat is indicated by the differential equation of heat conduction and the flow of water is indicated by the differential equation of diffusion. (4) The variation of heat is related linear to thermal strains and the variation of desiccation is related linear to shrinkage strains.