流速法による引張クリープの定式化に対する一検討

The rate of flow method is one of the creep theories that are used in analysing thermal stress within concrete structure. The characteristic of this method is the capability to determine a creep by an arbitrary experimental result. This paper describes the examination result of the characteristic in tension experimentally.
The tests were carried out to the fly-ash cement concrete of type C with changing the loaded age and the stress level; the loaded ages were 5th, 15th and 25th day; the stress levels were 40% and 60% of the tensile strength. Only the long period test results were used to determine the creep by the rate of flow method. In case of the 40% stress level, the creep that was gained at the loaded age 15th day, is as same as the creep at the loaded age 25th day. In case of the 60% stress level, however, the creep at the loaded age 5th day is different from those.
Considering the above mentioned, the d．etermination of a creep by an arbitrary expermentalresult, thatis the characteristic of the rate of How method, is capable if creepis stationary creep On the other hand, if creep is non-stationary creep, which is generated at high stress level, the result need not be used.
Anyway, tbe charactenstic of the rate of flow method can be proved by the stationary creep at low stress level.