Abstract
Creep strain of plain concrete subjected to varying load can be expressed by the sum of three components, i. e., delayed elastic strain, flow creep strain and creep recovery strain. However, the Authors indicated in the previous paper that the effect of creep recovery upon the result of creep stress analysis is so small as negligible in case of prestressed or reinforced concrete member. Therefore, in this study, creep strain analysis was carried out on the member section of prestressed concrete by neglecting the effect of creep recovery. Analytical results showed that axial and rotational creep strains at arbitrary section of member can be expressed as the sum of three components, i. e., strains due to delayed elastic strain, due to flow creep and due to drying shrinkage of concrete, respectively. And further, equivalent creep factors were defined for axial and rotational creep strain of member section. Also, based on these creep strains for member section, average axial creep strain throughout the whole length of member and creep rotating displacements at both ends of member were derived in simple ex- pressions with the average axial and end rotation creep factors.
